REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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X15
System Reference Manual
Revision B1
July 22, 2016
Author:
Gerald Coley Gcoley1@emprodesign.com
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 2 of 88
THIS DOCUMENT
This work is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported
License. To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/
or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco,
California, 94105, USA.
All derivative works are to be attributed to Gerald Coley of BeagleBoard.org.
For more information, see
http://creativecommons.org/license/results-one?license_code=by-sa
For any questions, concerns, or issues submit them to gerald@BeagleBoard.org
DESIGN
These design materials referred to in this document are
*NOT SUPPORTED* and DO NOT constitute a
reference design. Only “community” support is allowed via
resources at BeagleBoard.org/discuss.
THERE IS NO WARRANTY FOR THE DESIGN MATERIALS,
TO THE EXTENT PERMITTED BY APPLICABLE LAW.
EXCEPT WHEN OTHERWISE STATED IN WRITING THE
COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE DESIGN MATERIALS “AS IS” WITHOUT
WARRANTY OF ANY KIND, EITHER EXPRESSED OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE
RISK AS TO THE QUALITY AND PERFORMANCE OF THE
DESIGN MATERIALS IS WITH YOU. SHOULD THE DESIGN
MATERIALS PROVE DEFECTIVE, YOU ASSUME THE COST
OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.
We mean it; these design materials may be totally
unsuitable for any purposes.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 3 of 88
UNITED STATES FCC AND CANADA IC REGULATORY COMPLIANCE
INFORMATION
The BeagleBone is annotated to comply with Part 15 of the FCC Rules.
Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation. Changes or
modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
This Class A or B digital apparatus complies with Canadian ICES-003. Changes or
modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment. Cet appareil numérique de la
classe A ou B est conforme à la norme NMB-003 du Canada. Les changements ou
les modifications pas expressément approuvés par la partie responsible de la
conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement.
BeagleBoard.org provides the enclosed product(s) under the
following conditions:
This evaluation board/kit is intended for use for ENGINEERING DEVELOPMENT,
DEMONSTRATION, OR EVALUATION PURPOSES ONLY and is not considered by
BeagleBoard.org to be a finished end-product fit for general consumer use. Persons
handling the product(s) must have electronics training and observe good engineering
practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective
considerations, including product safety and environmental measures typically found in
end products that incorporate such semiconductor components or circuit boards. This
evaluation board/kit does not fall within the scope of the European Union directives
regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of
these directives or other related directives.
Should this evaluation board/kit not meet the specifications indicated in the User’s
Guide, the board/kit may be returned within 30 days from the date of delivery for a full
refund to the distributor form which you purchased the board. THE FOREGOING
WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER AND IS
IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY,
INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY
PARTICULAR PURPOSE.
The user assumes all responsibility and liability for proper and safe handling of the
goods. Further, the user indemnifies BeagleBoard.org from all claims arising from the
handling or use of the goods. Due to the open construction of the product, it is the user’s
responsibility to take any and all appropriate precautions with regard to electrostatic
discharge.
EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER
PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL,
INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
BeagleBoard.org currently deals with a variety of customers for products, and therefore
our arrangement with the user is not exclusive. BeagleBoard.org assumes no liability
for applications assistance, customer product design, software performance, or
infringement of patents or services described herein.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Page 4 of 88
Please read the System Reference Manual and, specifically, the Warnings and
Restrictions notice in the User’s Guide prior to handling the product. This notice contains
important safety information about temperatures and voltages. For additional information
on BeagleBoard.org environmental and/or safety programs, please visit
BeagleBoard.org.
No license is granted under any patent right or other intellectual property right of
BeagleBoard.org covering or relating to any machine, process, or combination in which
such BeagleBoard.org products or services might be or are used.
Mailing Address:
BeagleBoard.org
4467 Ascot Ct.
Oakland TWP, MI 48306 U.S.A
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 5 of 88
WARRANTY: The BeagleBoard is warranted against defects in materials and
workmanship for a period of 90 days from purchase. This warranty does not cover
any problems occurring as a result of improper use, modifications, exposure to
water, excessive voltages, abuse, or accidents. All boards will be returned via
standard mail if an issue is found. If no issue is found or express return is needed,
the customer will pay all shipping costs.
Before returning the board, please visit
BeagleBoard.org/support
For up to date SW images and technical information refer to
http://circuitco.com/support/index.php?title=BeagleBone
Please refer to Section 9 of this document for the board checkout procedures.
To return a defective board, please request an RMA at
http://BeagleBoard.org/support/rma
Please DO NOT return the board without approval from the
RMA team first.
All boards received without RMA approval will not be worked
on.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 6 of 88
Table of Contents
FIGURES ...................................................................................................................................................... 8
TABLES .......................................................................................................................................................10
1.0 INTRODUCTION..............................................................................................................................11
2.0 CHANGE HISTORY .........................................................................................................................11
3.0 QUICK START SECTION ...............................................................................................................12
3.1 WHAT’S THE IN THE BOX ..................................................................................................................12
3.2 BOARD DETAILS ..............................................................................................................................13
3.2.1 TOP Side and BOTTOM Edge ...............................................................................................13
3.2.2 Top Side Connector Details ...................................................................................................14
3.2.3 TOP Edge and Bottom Side ...................................................................................................16
3.2.4 Bottom Side Details ...............................................................................................................17
3.2.5 Top Side Major Components .................................................................................................19
3.2.6 Top Side Major Component Details ......................................................................................20
3.3 CHECK IT OUT ..............................................................................................................................22
3.3.1 What is needed .......................................................................................................................22
3.3.2 SETUP INSTRUCTIONS ..............................................................................................................25
3.4 PLUG IN YOUR CABLES .............................................................................................................26
3.4.1 ETHERNET ...........................................................................................................................26
3.4.2 HDMI .....................................................................................................................................26
3.4.3 eSATA ....................................................................................................................................26
3.4.4 Keyboard and Mouse .............................................................................................................27
3.4.5 AUDIO ...................................................................................................................................27
3.4.6 Micro SD Card ......................................................................................................................28
3.4.7 USB Client .............................................................................................................................28
3.4.8 Serial Debug ..........................................................................................................................28
3.4.9 Terminal Setup .......................................................................................................................29
3.4.10 Plug in Power Cable .........................................................................................................29
3.4.11 Power LEDS .....................................................................................................................30
3.4.12 Turn ON HDMI monitor ...................................................................................................30
3.4.13 Turn ON X15 Power .........................................................................................................31
3.4.14 User LEDS ........................................................................................................................31
3.4.15 BOOTING .........................................................................................................................32
3.4.16 Boot Strapping ..................................................................................................................32
3.4.17 FAN Connection ...............................................................................................................33
3.4.18 FAN Mounting ..................................................................................................................33
3.5 TESTING ........................................................................................................................................34
3.5.1 DEBUG ..................................................................................................................................35
3.5.2 ETHERNET ...........................................................................................................................36
3.5.3 SPEAKERS ............................................................................................................................37
3.5.4 eSATA ....................................................................................................................................41
3.5.5 POWER ON and RESET ........................................................................................................42
3.5.6 HIGH TEMP CAUTION ........................................................................................................44
4.0 HARDWARE DESIGN OVERVIEW ..............................................................................................45
4.1 FEATURES ........................................................................................................................................46
4.2 BLOCK DIAGRAM .............................................................................................................................47
4.3 POWER SUBSYSTEM .........................................................................................................................48
4.3.1 Input Power and Conditioning ..............................................................................................48
4.3.2 PMIC .....................................................................................................................................49
4.3.3 Indicators ...............................................................................................................................51
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4.3.4 Voltage Clamp Circuits .........................................................................................................51
4.3.5 USB Power Bus .....................................................................................................................52
4.4 AM5728 PROCESSOR .......................................................................................................................53
4.5 MEMORY BLOCK DIAGRAM .............................................................................................................54
4.6 DDR3L ............................................................................................................................................55
4.6.1 DDR3 Terminations Regulator ..............................................................................................55
4.6.2 DDR3 Terminations Resistors ...............................................................................................56
4.6.3 Processor Interface ................................................................................................................57
4.6.4 DDR3L Connections ..............................................................................................................58
4.7 4G EMMC .......................................................................................................................................59
4.8 EEPROM ........................................................................................................................................59
4.9 USD CONNECTOR ............................................................................................................................60
4.10 BOOT MODES ..............................................................................................................................60
4.11 I2C1 BUS ....................................................................................................................................62
4.12 ETHERNET ...................................................................................................................................63
4.12.1 Ethernet 0 Processor Interface .........................................................................................64
4.12.2 Ethernet PHY Power .........................................................................................................65
4.12.3 Ethernet 0 RJ45 Connections ............................................................................................66
4.12.4 Ethernet 1 RJ45 Connections ............................................................................................67
4.13 HDMI .........................................................................................................................................68
4.1 AUDIO ..............................................................................................................................................69
4.1.1 Processor Interface ................................................................................................................69
4.1.2 Power Circuitry .....................................................................................................................70
4.1.3 Audio In/Out ..........................................................................................................................71
4.2 USB 2.0 CLIENT PORT .....................................................................................................................72
4.3 USB 3.0 AND HUB ..........................................................................................................................74
4.3.1 Processor and HUB Interface ...............................................................................................74
4.3.2 USB3 Port Power Control .....................................................................................................75
4.3.3 USB3 Port Connectors ..........................................................................................................76
4.4 ESATA/SATA .................................................................................................................................77
4.5 SERIAL DEBUG PORT .......................................................................................................................79
4.6 JTAG CONNECTOR ..........................................................................................................................80
4.7 TEMPERATURE SENSOR....................................................................................................................80
4.8 REAL TIME CLOCK ...........................................................................................................................81
4.9 USER LEDS ......................................................................................................................................82
4.10 FORGOTTEN PINS ........................................................................................................................83
5.0 EXPANSION CONNECTORS .........................................................................................................84
5.1 EXPANSION HEADER PINOUTS .........................................................................................................84
5.1 CREATING AND EXPANSION BOARD .................................................................................................85
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 8 of 88
Figures
Figure 1. BeagleBoard-X15 ......................................................................................... 12
Figure 2. X15 Top Side View ...................................................................................... 13
Figure 3. X15 Front Edge View ................................................................................... 14
Figure 4. BAT1 Location ............................................................................................. 15
Figure 5. X15 Top Edge View ..................................................................................... 16
Figure 6. Bottom Side of X15 ...................................................................................... 17
Figure 7. Location of Major ICs ................................................................................... 19
Figure 8. Desktop Configuration .................................................................................. 25
Figure 9. Ethernet Ports ................................................................................................ 26
Figure 10. HDMI Ports ............................................................................................... 26
Figure 11. eSATA/USB Port ...................................................................................... 26
Figure 12. Keyboard Transmitter ............................................................................... 27
Figure 13. Audio Jacks ............................................................................................... 27
Figure 14. MicroSD Card Cage .................................................................................. 28
Figure 15. USB Client Connector .............................................................................. 28
Figure 16. Serial Debug Port ...................................................................................... 28
Figure 17. Terminal Window Setup ........................................................................... 29
Figure 18. DC Jack Into P1 ........................................................................................ 29
Figure 19. DC 12V LED ............................................................................................ 30
Figure 20. Monitor Power Button .............................................................................. 30
Figure 21. Power LEDs .............................................................................................. 31
Figure 22. User LEDs ................................................................................................. 31
Figure 23. Terminal Window Showing Boot ............................................................. 32
Figure 24. Boot Strap Resistors .................................................................................. 32
Figure 25. Fan Connector ........................................................................................... 33
Figure 26. Fan Installation.......................................................................................... 33
Figure 27. X15 test Setup ........................................................................................... 34
Figure 28. Terminal Window ..................................................................................... 35
Figure 29. Debian Desktop ......................................................................................... 36
Figure 30. Open Web Browser ................................................................................... 36
Figure 31. Default Home Page ................................................................................... 37
Figure 32. Insert USB Flash Drive ............................................................................. 37
Figure 33. Adjacent USB Devices ............................................................................. 38
Figure 34. Media Insertion Notice ............................................................................. 39
Figure 35. Open And Play Sound File ....................................................................... 39
Figure 36. Volume Adjust .......................................................................................... 40
Figure 37. eSATA Cable and Drive ........................................................................... 41
Figure 38. Attached eSATA Drive Notice ................................................................. 42
Figure 39. Powering Off Using Shutdown Command ............................................... 43
Figure 40. Reset Button S2......................................................................................... 43
Figure 41. X15 Heat Zone .......................................................................................... 44
Figure 42. System Block Diagram ............................................................................. 47
Figure 43. System Power Management Block Diagram ............................................ 48
Figure 44. TPS650374 Block Diagram ...................................................................... 49
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Page 9 of 88
Figure 45. Voltage Clamps ......................................................................................... 51
Figure 46. USB 5V Switcher ...................................................................................... 52
Figure 47. AM5728 Block Diagram........................................................................... 53
Figure 48. System Memory Block Diagram .............................................................. 54
Figure 49. DDR3 Termination Voltages .................................................................... 55
Figure 50. DDR3 Termination Resistors .................................................................... 56
Figure 51. DDR3 Processor Interface ........................................................................ 57
Figure 52. DDR3L Memory Device connections ...................................................... 58
Figure 53. eMMC Circuitry........................................................................................ 59
Figure 54. EEPROM Circuitry ................................................................................... 59
Figure 55. uSD Circuitry ............................................................................................ 60
Figure 56. Boot Pin Settings....................................................................................... 61
Figure 57. I2C1 Bus ................................................................................................... 62
Figure 58. Ethernet System Block Diagram ............................................................... 63
Figure 59. Ethernet 0 Processor Interface .................................................................. 64
Figure 60. Ethernet Power Diagram ........................................................................... 65
Figure 61. Ethernet RJ45 Interface............................................................................. 66
Figure 62. Ethernet 1 RJ45 Interface .......................................................................... 67
Figure 63. HDMI Interface Circuitry ......................................................................... 68
Figure 64. Stereo CODEC Processor Interface .......................................................... 69
Figure 65. AIC3104 Power Circuitry ......................................................................... 70
Figure 66. Stereo CODEC Audio Connections .......................................................... 71
Figure 67. USB Client Port ........................................................................................ 72
Figure 68. Alternate VBUS Detect Circuitry ............................................................. 73
Figure 69. USB3 and HUB Processor Interface ......................................................... 74
Figure 70. USB3 Power Control ................................................................................ 75
Figure 71. USB Port 1 Connectors ............................................................................. 76
Figure 72. USB Port 2 and 3 Connectors ................................................................... 76
Figure 73. eSATA Block Diagram ............................................................................. 77
Figure 74. eSATA Circuitry ....................................................................................... 78
Figure 75. Debug Serial Port ...................................................................................... 79
Figure 76. FTDI USB to Serial Adapter ..................................................................... 79
Figure 77. JTAG Port ................................................................................................. 80
Figure 78. Temperature Sensor Circuitry ................................................................... 80
Figure 79. Real Time Clock Circuitry ........................................................................ 81
Figure 80. User LEDs Circuitry ................................................................................. 82
Figure 81. Forgotten Pins ........................................................................................... 83
Figure 82. Expansion Connector ................................................................................ 84
Figure 83. Expansion Board Measurements............................................................... 85
Figure 84. Expansion Mating Expansion Connector.................................................. 86
Figure 85. X15 Top Side View .................................................................................. 87
Figure 86. X15 Bottom Side View ............................................................................. 88
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 10 of 88
Tables
Table 1. Change History ............................................................................................. 11
Table 2. List of Needed Accessories ........................................................................... 22
Table 3. BeagleBoard –X15 Features ......................................................................... 46
Table 4. Power, Current, Sequencing and Distribution .............................................. 50
Table 5. Boot Options ................................................................................................. 60
Table 6. I2C1 Device Address .................................................................................... 62
Table 7. User LED GPIO Mapping ............................................................................ 82
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 11 of 88
1.0 Introduction
This document is the System Reference Manual for the BeagleBoard X15 which is
based on the TI AM5728 processor. This document covers the features and design of the
board.
.
2.0 Change History
This section describes the change history of this document.
Table 1. Change History
Rev
Changes
Date
By
0.1
Preliminary release.
7/23/2015
EPD
0.2
Added pictures, connector details, accessories list
10/19/2015
EPD
A2
Limited Production Release
5/13/2016
EPD
B1
Update pictures
7/22/2016
EPD
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Page 12 of 88
3.0 Quick Start Section
3.1 What’s the in the box
In the box you will find a BeagleBoard-X15 board inside an ESD bag.
Figure 1. BeagleBoard-X15
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 13 of 88
3.2 Board Details
This section calls out key connectors and components on the board and provides a brief
description of each.
3.2.1 TOP Side and BOTTOM Edge
Shown without the heatsink installed.
Figure 2. X15 Top Side View
AUDIO OUT
RESET
micro SD
USB3
USB3 x2
DEBUG HEADER
POWER BUTTON
DC IN JACK
HDMI
ESATA
ENET x2
HEATSINK
FAN POWER
Li-ION
BATTERY
(OPTIONAL)
EEPROM
ENABLE TP
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Figure 3. X15 Front Edge View
3.2.2 Top Side Connector Details
P5 ETHERNET x2
o Stacked RJ45 Jack with LEDs and integrated magnetics
o Port Location shown in Figure 4
P6 ESATA/USB
o eSATA - USB Type A Receptacle Combo
o Powered interface at 500mA
o Powers HDD or SSD drives from 5V supply
P11 HDMI
o HDMI Type A - 19 Position Surface Mount, Right Angle
P1 DC JACK
o CONN PWR JACK DC 2.5X5.5 8A T/H
S1 POWER BUTTON
o Tactile SPST-NO 0.05A Momentary Switch
o Hold 12 seconds to power OFF the board
P2-P3 CURRENT MONITOR SECTION
o Power Taps used for power measurements
o 100mil pin headers need to be installed prior to taking measurements
P10 DEBUG HEADER
o Same as used on BeagleBone Black
o See section 3.4.8 for details
P8-P9 AUDIO OUT/IN
o Standard 3.5mm jacks
USB Port 3
OUT IN USB Port 1
USB Port 2
µSD USB CLIENT
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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o Stereo Audio Connector Jacks with single switch
S2 RESET BUTTON
o Momentary Tactile SPST-NO Switch
P12 Micro SD Card Cage
o ALPS Push-Push Type – Reverse mounting – Micro SD Connector
o Insert microSD card face up
P13-P15 USB 3.0 CONNECTORS
o SuperSpeed Panel Mount USB3.0 connectors
o Port numbering shown in Figure 3.
o NOTE: Use narrower drives when plugging both Port-1 and Port-2
HEATSINK
o CPU 1.01” SQ with Vertical Fins and thermal tape adhesive backing
o Fins spaced to support 4-40 screws that can hold an added CPU FAN
J1 FAN SOCKET
o The X15 can support a CPU FAN
o The Fan can be purchased separately
o Fan Part No: X15FANKIT-ND
o Fan socket details shown in section 3.4.17
BAT1 Li-ION BATTERY
o A Li-Ion battery can be installed on the X15 PCB
o Battery Part Number: RENATA CR1220MFR FV
o Can be purchased here:
http://www.mouser.com/Search/Refine.aspx?Keyword=CR1220MFR
o NOTE: Before Installing Battery BAT1 remove R416 from bottom side of
PCB
Figure 4. BAT1 Location
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Page 16 of 88
3.2.3 TOP Edge and Bottom Side
Figure 5. X15 Top Edge View
ENET X2
eSATA
HDMI
DC JACK
PWR ON
ENET 1
ENET 2
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 17 of 88
Figure 6. Bottom Side of X15
3.2.4 Bottom Side Details
Bottom Side Major Components Details
Y1 RTC Crystal
o 32.768KHz REAL TIME CLOCK Tuning Fork Crystal
o Used in conjunction with U6 and BAT1 (top side)
U8 EEPROM
o 4KB EEPROM used to hold board information via I2C1
F1 5A FUSE
o 5A Fuse in SMT base
o Replacement Fuse: 0454005.MR
µSD CAGE
20pin JTAG
USB CLIENT
RTC XTAL
FUSE
EEPROM
REF: SRM_X15
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Reference Manual
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Page 18 of 88
Bottom Side Connector Details:
P4 20-pin JTAG Connector
o For use with TI JTAG emulators and CCS debugging tools
P7 USB Client
o USB 2.0 Client port
o USB Type B jack
P12 microSD cage
o ALPS Push-Push Type – Reverse mounting – Micro SD Connector
o Insert microSD card face up
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 19 of 88
3.2.5 Top Side Major Components
Figure 7 below shows the major IC and components on the BeagleBoard-X15.
Figure 7. Location of Major ICs
U5
U11
U18
U23
U24
U26
U25
U14 U15
U22
U17
U
AM5728
PMIC
NFBGA
eMMC
4Gx8
USB
HUB
AUDIO
CODEC
DDR
Regulator
DDR3
4Gb x4
SERDES
CLK GEN
SATA
REDRIVER
10/100/1000
ENET PHY
x2
RTCC
USER
LEDs
REF: SRM_X15
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Reference Manual
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Page 20 of 88
3.2.6 Top Side Major Component Details
U5 PMIC
o Power Management IC (PMIC)
o 13 x 13 nFBGA 0.8mm pitch
o 7-configurable converters up to 6A output current
o 7 LDOs for external use
o 32KHz RC oscillator for power sequence
o SPI or I2C control
U11 PROCESSOR
o Sitara AM5728, FCBGA 0.8mm pitch
o Dual ARM Cortex-A15 @ 1.5GHz
U7 SERDES CLOCK GENERATOR
o Reference Clock generator for PCI Express (PCIe) Gen1-Gen3
o Accepts 25MHz oscillator input
U23-U26 DDR3
o 4x 256Mb x16 DDR3L 2Gb (256MB)
o 2x 32 bit memory buses with two 16 16b devices on each bus.
U27 DDR VTT REGULATOR
o TPS51200 Sink and Source DDR Termination Regulator
o Lower Power DDR3 VTT Bus Termination
U18 AUDIO CODEC
o Low power stereo Audio DAC
o Part No
o 3D, EQ, PLL, LP Bypass, Notch Filtering
D4-D7 USER LEDs
o 4 user LEDs available
o Part No: LTST-C191KFKT
o GPIO Driven
U17 USB HUB
o 4-Port USB 3.0 HUB
U22 eMMC 4GB
o eMMC 5.0 (HS200) 153B 4GB
o HS200 Standard
U14-U15 10/100/1000 ENET PHYs
o Single chip 10/100/1000Mbps ENET Transceiver
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
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Page 21 of 88
o RGMII3.3V/2.5V/1.8V tolerant IOs.
U6 RTCC
o 8pin RTC with optional battery backup
o I2C I/F
U33 SATA REDRIVER
o 2 Ch 3-Gbps single lane redriver
o Also supports SATA 1.5-Gbps
o Hot Plug capable
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 22 of 88
3.3 CHECK IT OUT
This section provides instructions on how to check out the board after you receive it.
3.3.1 What is needed
Table shows the accessories needed to test all X15 peripherals. Some of these items
may need to be purchased if the user does not already own them. For power supply and
serial cables please observe power requirements when purchasing. The power jack on the
BEAGLEBOARD-X15 accepts a 2.5mm barrel to differentiate it from other board
supplies.
Table 2. List of Needed Accessories
DC POWER SUPPLY
12V Supply
60W (5A min)
2.5mm x 5.5mm Barrel Plug Size
Option 1: TRG70A120
Option 2: VEF65US12
Option 3: CENB1060A1203F01
Option 4: TRG70A120-02E01
TTL TO USB SERIAL CABLE
3.3V USB to SERIAL
Compatible with the one used on BBB
Can be purchased from various sources
One such cable can be purchased here:
http://www.digikey.com/product-detail/en/TTL-
232R-3V3/768-1015-ND/1836393
HDMI AUDIO-VIDEO CABLE
Type A Male to Male
Full size cable – NOT as used for
BeagleBone Black
Preferably 3ft or longer
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 23 of 88
ETHERNET CABLE
Two cables needed if both interfaces used
Use Cat6 cables
ENET PHYs have Auto MDI/MDI-x
Crossover or straight cables can be used
AUDIO CABLE
3.5mm jacks on both ends
Need two if Speakers do not come with
one
SPEAKERS
Any amplified desktop speaker system
Includes 3.5mm audio cable
HDMI MONITOR
HD monitor capable of 1080P
With integrated audio
Or Output jack for Audio
MICRO SD CARD
4GB to 16GB
Class 10
Standard Adapter
eSATA ADAPTER CABLE
eSATA to SATA cable
Combo cable
Below are two such cables:
http://www.cablesonline.com/19estosa22ex.html
http://www.monoprice.com/product?p_id=8492
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 24 of 88
SATA DRIVE
2.5” SATA HDD - Hard Disk Drive
One option available here: Newegg.com
2.5” SATA SSD - Solid State Drive
http://www.amazon.com/ADATA-Premier-2-5-
Inch-Synchronous-ASP900S3-128GM-
C/dp/B007RHT48S
USB THUMB DRIVE
USB3.0 thumb drive
Needed for file storage
Or to boot from USB3
WIRELESS KEYBOARD/MOUSE
Wireless combo will save USB ports used
Less wire clutter
Besides the accessories mentioned it is assumed the user has a PC or Laptop running
Linux or Windows.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 25 of 88
3.3.2 SETUP INSTRUCTIONS
Standalone w/Display and Keyboard/Mouse
In this configuration, the board works more like a PC, totally free from any connection to a
PC as shown in Figure 8. It allows you to create your code to make the board do whatever
you need it to do. It will however require certain common PC accessories. These accessories
and instructions are described in the following section
Figure 8. Desktop Configuration
Board is shown without the heatsink installed. Additionally, an Ethernet cable can be
connected for network access if desired.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 26 of 88
3.4 PLUG IN YOUR CABLES
3.4.1 ETHERNET
There are two ports on the Ethernet
connector off the X15. Plug the cable into
either port.
NOTE the orientation of cable insertion
between the two ports in Figure 9.
Figure 9. Ethernet Ports
3.4.2 HDMI
Plug in HMDI cable into P11 HDMI
connector on the top edge of the X15 board.
Figure 10. HDMI Ports
3.4.3 eSATA
Plug in the eSATA cable as shown in Figure 10.
The same connector P6 can be used as a
USB connector which is the 4th USB port on
the X15.
Figure 11. eSATA/USB Port
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 27 of 88
3.4.4 Keyboard and Mouse
To avoid using up multiple USB ports a
Wireless keyboard and mouse combination
is preferred. The transceiver can be installed
in any of the USB ports including P6
eSATA connector.
NOTE: USB 3.0 ports and devices have
been shown to radiate radio-frequency noise
that can interfere with some wireless or
Blutooth mice.
Figure 12. Keyboard Transmitter
3.4.5 AUDIO
To playback and record audio, insert speaker
cable into Audio OUT jack of the X15 and
an audio source into the Audio IN jack.
NOTE: Audio IN is not amplified. It is Line
In only and does not support microphones.
Figure 13. Audio Jacks
OUT
IN
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 28 of 88
3.4.6 Micro SD Card
On the bottom edge of the X15 board, on the
bottom side is the micro SD card cage. If
booting from the SD card, the micro SD
card is inserted as shown in Figure 14 with
the top side facing up.
Figure 14. MicroSD Card Cage
3.4.7 USB Client
The USB Client connector P7 is located on
the bottom side of the board below USB3
Port 1 and next to the uSD Card cage.
Caution when inserting and removing the
client cable as it will exert excessive pressure
on the connector jack.
Figure 15. USB Client Connector
3.4.8 Serial Debug
Plug in the USB to Serial cable into the 6
pin header P10. Observe correct orientation.
Pin1 is located at the top side of the header.
PIN NUMBER
SIGNAL
1
Ground
4
Receive
5
Transmit
Figure 16. Serial Debug Port
Pin1
Pin6
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 29 of 88
3.4.9 Terminal Setup
Plug the USB end into your PC or Laptop and invoke MINICOM or TERATERM or
your favorite Terminal emulator program.
The settings for serial communications are:
Figure 17. Terminal Window Setup
3.4.10 Plug in Power Cable
Once all the needed cables are inserted, plug
in the DC power adapter into the P1 jack.
This is a 2.5mm center contact and requires
a supply that comes with a 2.5mm jack or an
adapter to 2.5mm. See Figure 18 for more
info.
Figure 18. DC Jack Into P1
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 30 of 88
3.4.11 Power LEDS
Once the power plug is inserted in P1, the
Power LED D41 will light up.
Figure 19. DC 12V LED
3.4.12 Turn ON HDMI monitor
Once power is connected, turn on the HDMI
monitor. Change input to the HDMI port the
X15 is connected to.
Figure 20. Monitor Power Button
D41 - 12V Present LED
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 31 of 88
3.4.13 Turn ON X15 Power
Though power is plugged in and the
terminal is connected there will be no
activity observed on the terminal. LED D41
will glow.
To turn ON the X15 main power press the
blue momentary switch S1. This will cause
LED D3 to glow showing that the board
power is ON.
Figure 21. Power LEDs
3.4.14 User LEDS
The BB-X15 has four user LEDs for debug,
and status indication. During the bootting
process the user may notice that the user
LEDs will blink.
Figure 22. User LEDs
D41 - 12V Present LED
D3 - POWER ON LED
D4 D5 D6 D7
S1
D41
D3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 32 of 88
3.4.15 BOOTING
At this point the software
present in eMMC or the SD
card if installed will start to
boot and activity can be seen
on the terminal. The actual
information printed out may
vary based on the SW image
used.
Figure 23. Terminal Window Showing Boot
3.4.16 Boot Strapping
The default option ,SD followed by eMMC setting, is hardwired via soldered on resistors.
Table 3 shows the boot strap options for the BeagleBoard-X15. The default is SD then
eMMC.
NOTE: To set different boot options Resistors R442-R444 will need to be de-soldered firs
and then solder in the other options. Be careful when doing this.
Boot Strap Options
Figure 24. Boot Strap Resistors
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 33 of 88
3.4.17 FAN Connection
The X15 can support a 5V fan when a socket is
installed at J1. Digikey offers a fan kit that will fit
the X15 heatsink and plug into J1. Part number is
X15FANKIT-ND,
See Figure 25 and the next section for one FAN
option that is supported.
Figure 25. Fan Connector
3.4.18 FAN Mounting
The heatsink that comes with the X15 has a 7x7 fin
matrix that can accept 4-40 self-threading screws at
each corner. The screws will self-thread and hold
the fan in place.
Figure 26. Fan Installation
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 34 of 88
3.5 TESTING
Once the X15 interfaces are connected your system is ready to test. This section will go
through what you can quickly test on your new BB-X15
Figure 27. X15 test Setup
Using a wireless keyboard and mouse is preferred since it frees up USB ports.
However, when using a wireless combo, please know that USB 3.0 ports and devices
have been shown to radiate radio-frequency noise that can interfere with wireless mice
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 35 of 88
that rely on 2.4GHz radio-frequency dongles, as well as mice that use Bluetooth for
connectivity. This is a common warning you see particular on laptops.
3.5.1 DEBUG
The Serial debug port on the processor is UART3 via a single 1x6 pin header. In order to
use the interface a USB to TTL adapter will be required. The header is compatible with
the one provided by FTDI and can be purchased from various sources. Signals supported
are TX and RX. None of the handshake signals are supported. On the PC you will see
activity that will take you to login prompt.
Figure 28. Terminal Window
A few seconds after the board power is turned on, the image in eMMC or SD if booting
form SD, will boot and the Debian desktop will soon show up on the HDMI monitor.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 36 of 88
Figure 29. Debian Desktop
3.5.2 ETHERNET
Assuming the Ethernet cable is connected to one of the Ethernet ports on the
Beagleboard-X15 a quick test can be performed by pointing the mouse to the bottom left
corner of the Desktop and clicking the Debian menu logo.
From here point to Internet Chromium Browser.
Figure 30. Open Web Browser
The browser window will open and if there is an internet connection, the browser will go
to the default homepage.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 37 of 88
Figure 31. Default Home Page
The second Ethernet port can be similarly tested by moving the cable from ENET0 to
ENET1. See Section 3.4.1
3.5.3 SPEAKERS
To test the sound of your X15 you can open a sound file and play it back. In the example
below, a simple file is played via the Chromium Web browser. The sound file can be
present in a USB flash drive plugged into one of the USB3/2 connectors at the bottom
edge of the board or you could copy a file onto the X15 eMMC .
Figure 32. Insert USB Flash Drive
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 38 of 88
NOTE: Depending on the width of the flash drive used, two adjacent drives may not fit
well in P13 Port-1 and P15 Port-2 connectors due to the proximity of the two connectors.
If two drives will not fit, do not force but use a narrower flash drive in one of the bottom
ports.
Figure 33. Adjacent USB Devices
On the Debian Desktop a window will pop-open and ask you if you want to see the
contents of the newly installed flash drive. Also on the Tera Term console you can also
read the logs associated with the insertion of the drive.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 39 of 88
Figure 34. Media Insertion Notice
Click ‘Open in file Manager’ to see the contents of the flash drive. Proceed to open the
sound file. In case there is no music player installed yet, open the wav file with
Chromium Brower. Then click play.
Figure 35. Open And Play Sound File
To adjust volume make sure your speakers are connected and the speaker volume is
turned to a nominal volume. The X15 volume can be adjusted by clicking on the lower
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 40 of 88
right hand side left of the clock (icon missing in this example) and adjusting the volume
lever up and down.
Figure 36. Volume Adjust
Audio In can be similarly tested by using a 3.5mm to 3.5mm audio cable between a PC
playing a sound file and the X15 recording it via connector jack P9.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 41 of 88
3.5.4 eSATA
To test the eSATA interface you will need a cable and drive as described in Section
3.4.3. This drive has to be 2.5” drive since this interface will only support 3.3V drives.
Simply plug in the cable into connector P6 and the drive will be detected. The connector
also accepts a USB 2.0 flash drive or other USB 2.0 devices.
Figure 37. eSATA Cable and Drive
When plugged in, the eSATA or USB will be listed on the Debian Desktop as shown
below:
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 42 of 88
Figure 38. Attached eSATA Drive Notice
3.5.5 POWER ON and RESET
To power OFF the board you can Press-and-Hold the power button for 12 seconds.
Another way to power off the board is to use the ‘shutdown’ command at the terminal
prompt. The board will then start powering off.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 43 of 88
Figure 39. Powering Off Using Shutdown Command
To RESET the board you can press the RESET button S2. Pressing once should reboot
the board.
Figure 40. Reset Button S2
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 44 of 88
3.5.6 HIGH TEMP CAUTION
CAUTION: The BeagleBoardX15 may reach elevated temperatures.
Avoid handling the board while power is applied, especially in area shown
below. The same is true for the bottom side of the board.
Figure 41. X15 Heat Zone
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 45 of 88
4.0 Hardware Design Overview
This section provides a more detailed description of the design of the board. This is
intended to provide a more complete description of each circuit. It is intended to provide
basic knowledge of the devices used and how they interface to one another. It does not
provide details of their designs or specification. Please refer to the datasheet for each
device from their respective suppliers if this information is needed.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 46 of 88
4.1 Features
The Table 2 below provides the high level features of the BeagleBoard-X15.
Table 3. BeagleBoard –X15 Features
BeagleBoard-X15
Processor
Dual ARM Cortex-A15 @ 1.5GHz, TI Sitara AM5728
Graphics
Dual Core SGX544 3D, 532MHZ
DSP
Dual C66x, 700MHZ
Video Accelerator
IVA, 532MHZ
Graphics
GC3230 2D BTBLT
GP ARM Cores
DUAL ARM M4, 212MHZ
SDRAM
2GB DDR3L, Dual 32bit bus, Non-ECC 533MHZ
Onboard Flash
4GB, 8bit Embedded eMMC
PMIC
TPS659037
Debug Support
20-pin CTI JTAG, Serial debug header
PCB
4.2” x 4”, 12 layers
Indicators
(2) Power, (4) Ethernet, (4) User Controllable
HS USB 3.0 Host
(2) Type A 900ma (1) 1800mA (1)
USB 2.0 Host
(1) 500mA via eSATA Connector
USB 2.0 Client
(1) micro USB Type B
Ethernet
(2) 10/100/1000 RJ4
SATA
(1) eSATA Connector- Powered 500mA
LCD Ports
(2) Via Expansion
PCIe
(2) Channels via expansion
Camera Ports
(1) Via expansion
SD
(1) microSD
User Input
(1) Reset Button (1) Power Button
HDMI
(1) Full Size connector, 24b 1920x1080 60FPS, EDID
Audio
HDMI and AIC3104 (Stereo In/Out)
Expansion
(4) 60 pin dual row headers
GPIO pins
157
UARTs
7
SPI/I2C/CAN
1/1/1
PRU Pins
185
Real Time Clock
8pin RTC with optional battery backup, I2C I/F
Current Taps
(4) 5V, 3.3V, VDD_MPU, VDD_DSP, VDD_CORE
Weight
TBD
Power
12VDC@2A (3A additional if USB3 ports fully loaded)
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 47 of 88
4.2 Block Diagram
The figure below is a block diagram of the board. There are more detailed block diagrams
in some of the sections that follow along with condensed schematics for the various
circuits.
Figure 42. System Block Diagram
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 48 of 88
4.3 Power Subsystem
Figure 17 is the high level block diagram of the system power architecture of the board.
Figure 43. System Power Management Block Diagram
4.3.1 Input Power and Conditioning
The board is powered from a 12V 5A power supply using a 2.5mm x 5.5mm connector.
There are three switching regulators that are used to create the four main voltage rails
required by the system.
5V0………..Provides 5V to the PMIC, LEDS, HDMI, and the expansion headers.
PS3V3….….Provides the main 3.3V I/O rail supply, via the SW, and to the
PMIC.
VDD_3V3….Provides main I/O rail for the board and the expansion headers.
This is controlled by a power FET.
USB 5V…….The USB requires a lot of current to meet the USB3 requirements.
This switcher is dedicated to supplying the power to the USB3 ports.
There is a fuse provided to limit the current to the 5A rating of the power supply. The
fuse is replaceable.
12V to 5VDC
4A TPS54531
12VDC to 3.3V
4A TPS54531
FUSE 5A Slow
Blow
12VDC to 5V
4A TPS54531
SW
TPS22965
VDD_3V3
TPS65039
Power
Management IC
PS_3V3
System Voltages
USB_5V
Power
Button
5V0
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 49 of 88
4.3.2 PMIC
The figure below is the high level block diagram of the TPS659039-Q1 Power
management IC used on the board.
Figure 44. TPS650374 Block Diagram
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 50 of 88
The PMIC has multiple switchers and LDOs that provide power to the processors and the
overall system. The one exception to this is the VDD_3V3 rail that is used to power the
I/O rails of the processor and the other devices in the system. This rail is controlled by the
TPS65039 to insure proper power sequencing. The table below shows the distribution of
the various rails and the sequence in which they come up.
Table 4. Power, Current, Sequencing and Distribution
SEQ
MODE
SIGNAL
VOLTS
mA
DELAY
PMIC RAIL
ON
SLEEP
AM57X
1
LDO_VRTC
1.8V
250
0
LDOVRTC
ON
ON
vdda_rtc
2
VDD_1V8
1.8V
1000
550
SMPS8
Forced
PWM
OFF
vdds_mlbp
vdds18v
vdds18v_ddr1
vdds18v_ddr2
3
VDD_RTC
1.05V
50
0
LDO9
ON
ON
vdd_rtc
4
VDDA_1V8_PLL
1.8V
100
550
LDOLN
ON
OFF
vdda_abe_per
vdda_ddr
vdda_debug
vdda_dsp_eve
vdda_gmac_core
vdda_gpu
vdda_iva
vdda_video
vdda_mpu
vdda_osc
5
VDD_CORE
1.03V
2000
550
SMPS6
Forced
PWM
OFF
vdd
6
VDD_MPU
1.09V
6000
550
SMPS1&2
Forced
PWM
OFF
vdd_mpu
7
1.06V
550
SMPS4&5
Forced
PWM
OFF
vdd_dspeve
VDD_DSP
4000
vdd_gpu
vdd_iva
8
VDDA_1V8_PHY
1.8V
200
0
LDO3
ON
OFF
vdda_usb1
vdda_usb2
vdda_hdmi
vdda_pcie
vdda_pcie0
vdda_pcie1
vdda_sata
vdda_usb3
9
VDD_SHV5
3.3V
300
550
LDO2
ON
ON
vddshv5
10
VDD_3V3
3.3V
550
REGEN1
(TPS54531D
via
TPS22965
switch)
ON
OFF
vddshv1
vddshv10
vddshv11
vddshv2
vddshv3
vddshv4
vddshv6
vddshv7
vddshv9
11
VDD_DDR
1.35V
2000
550
SMPS3
ON
OFF
vdds_ddr2
vdds_ddr1
TPS51200
ON
OFF
ddr1_vref0
ddr2_vref0
12
VUSB_3V3
3.3V
100
0
LDOUSB
ON
OFF
vdda33v_usb1
vdda33v_usb2
13
VDD_SD
3.3V
300
550
LDO1
ON
OFF
vddshv8
14
RESET_OUT
ON
OFF
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 51 of 88
In order for the board to power on, you will need to press the power button one time.
Press and release and do not hold the button down.
4.3.3 Indicators
There are two orange indicators on the board for the power rails:
DC…indicates that the 12V DC supply is connected. It does not indicate that the
voltage is within specification, but only that it is connected.
POWER…indicates that the PMIC has powered on and that the voltages are then
applied to the board. It does not indicate that any voltages are within
specification, but only that it is connected.
4.3.4 Voltage Clamp Circuits
Figure 45. Voltage Clamps
During power down it should be ensured that the difference between VDDS and
VDDSHVx [1–6] during the entire power-down sequence is < 2 V. If this is violated it
can result in reliability risks for the processor.
U35
TLVH431
Q8
TRN_2N2907
VDD_3V3
VDD_1V8
R418
500,1%
R429 10K,1%
R419
DNI
R420
40K,1%
VDD_3V3
VDD_1V8
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 52 of 88
This solution was added to make sure that the difference between the 3.3-V VDDSHVx
rails and the 1.8-V VDDS rail never exceeds 2V.
4.3.5 USB Power Bus
The board is designed with a USB 3.0 HUB and supports three USB 3.0 ports. The
requirement is that each port support up to 900mA per port. For a high current charging
port, this number is raised to 1.5A. This brings the total to 3.3A max of 5V. In order to
supply this much current if needed, a dedicated 5V switcher is supplied. The figure
below shows the switcher.
Figure 46. USB 5V Switcher
The switcher is capable of supplying up to 4A. It is not expected to reach that much, but
the capacity is provided. In the event that it is required to compensate for onboard voltage
drop, the voltage level can be adjusted by changing R292 and R296 as indicated in the
datasheet for the switcher. The need for this is not expected, but a user may want to
create a little higher voltage to compensate for devices connected to the ports.
U28_6
R297
20.5K,1% R294
169K
L16
4.7uH
R296
1.91K
U28_3
C410
.001uF,50V
C409
22pF
USB_SNS
U28_RC
C401
0.1uf,25V,0805
R295
45.3K
U28_4
12V
U28_8
12VDC TO 5VDC 4A
U28_1 U28
TPS54531D
BOOT
1
VIN
2
EN
3
SS
4VSNS 5
COMP 6
PH 8
GND 7
PAD
9
D24
SK54AFL-TP
R292
10.2K,1%
C408
8.2nF,10V,0201
+C403
100uF,10V
USB_5V
C402 4.7uF,50V.LESR
C440 4.7uF,50V.LESR
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 53 of 88
4.4 AM5728 Processor
This board is designed to support the AM5728 processor. For detailed information on the
AM5728 processor you can go to http://www.ti.com/product/AM5728/compare for more
information. Figure 47 is the block diagram of the AM5728 processor.
Figure 47. AM5728 Block Diagram
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 54 of 88
4.5 Memory Block Diagram
Figure 48 below shows the block diagram of the memory system on the board.
Figure 48. System Memory Block Diagram
uSD ….The SD card cage that supports booting for the processor
EEPROM…provides board identification information
eMMC….provides boot source for the processor
DDR3L…main program space from which the processor operates.
Each of these are discussed in their own sections to follow.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 55 of 88
4.6 DDR3L
There are four 256Mb x16 DDR3L 2Gb (256MB) memory devices used in the design.
The memory used is either the MT41K256M16HA-125:E from Micron or the
D2516EC4BXGGB from Kingston. There are two 32 bit memory buses with two
devices on each bus.
4.6.1 DDR3 Terminations Regulator
Figure 22 below is the regulator that handles the VTT voltage rail. The regulator creates
the voltage for the termination circuits and the DDR_VREF level as well.
Figure 49. DDR3 Termination Voltages
This regulator supplies the required functions for both of the DDR3L banks on the board.
Q5 and Q6 are added to force a drain off of the VTT voltage after powering off the
system to bleed off any residual voltage left on that pin in order to prevent damage to the
processor.
DDR_VREF_OFFn
19
R290 0,1%
R291 0,1%
R289
10,5%
C400
10pF,NPO
U27
TPS51200_10SON
VOSNS 5
PGND 4
VO 3
PWRPAD
11
VLDOIN 2
REFIN 1
REFOUT
6EN
7GND
8PGOOD
9VIN
10
R286
100K,1% C391
.001uf,50V
C390
.001uf,50V
R285 10K,1%
C397
10uF,6.3V
C393
10uF,6.3V
C394
10uF,6.3V
C395
10uF,6.3V
VDD_3V3
VDD_DDR
DDR_VREFSTL1
DDR_VREFSTL2
VTT
VTT_PGOOD
VTT_EN
VTT_VOSNS
VTT_REFOUT
C396
10uF,6.3V
DDR_REFIN
VTT_TRAN
C389
10uF,6.3V
C399
0.1uf,16V
R288
10K,1%
R287
10K,1%
C398
0.1uf,16V
Q5
NTA4153N
Q6
BSS138
PS_3V3
C392
0.1uf,16V
R335
10K,1%
VTT
DDR_VREFSTL2 20,22
DDR_VREFSTL1 19,21
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 56 of 88
4.6.2 DDR3 Terminations Resistors
The figure below is the terminations on the control lines of the DDR3 interface. This is
the same for both busses. Only one is shown here. Refer to the schematic for more
information.
Figure 50. DDR3 Termination Resistors
DDR1_CKE
19,21
DDR1_CLK0N
19,21
DDR1_CLK0
19,21
VDD_DDR
VDD_DDR
VTT
DDR1_A519,21
DDR1_A319,21
DDR1_A119,21 DDR1_A019,21
DDR1_A1119,21
DDR1_A919,21 DDR1_A719,21 DDR1_A1319,21
DDR1_A1419,21
DDR1_A419,21
DDR1_A219,21
DDR1_A1519,21
DDR1_A1019,21
DDR1_A819,21
DDR1_A619,21
DDR1_BA219,21 DDR1_BA119,21
DDR1_BA019,21
DDR1_A1219,21
C342 0.22uF/201
C351 0.22uF/201
C353 0.22uF/201
C343 0.22uF/201
C352 0.22uF/201
C358 0.22uF/201
C362 0.22uF/201
C370 0.22uF/201
C371 0.22uF/201
C372 0.22uF/201
C379 0.22uF/201
C380 0.22uF/201
DDR1_CSN019,21 DDR1_CASn19,21 DDR1_ODT019,21 R361 47,1%
R360 47,1%
R363 47,1%
R282 49.9,1%
R362 47,1%
R365 47,1%
R364 47,1%
R366 47,1%
R367 47,1%
R283 49.9,1%
R284 49.9,1%
R368 47,1%
R369 47,1%
R371 47,1%
R370 47,1%
R373 47,1%
R372 47,1%
R375 47,1%
R374 47,1%
DDR1_WEN
19,21
DDR1_RASN
19,21
R376 47,1%
R377 47,1%
R378 47,1%
R379 47,1%
R381 47,1%
R380 47,1%
R383 47,1%
R382 47,1%
DDR1_CLK_TERM C388
0.1uf,16V
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 57 of 88
4.6.3 Processor Interface
The figure below shows the connections to the processor. This is the same for both
busses. Only one is shown here. Refer to the schematic for more information.
Figure 51. DDR3 Processor Interface
DDR_VREF_OFFn 24
R274
1K,5%
R273
1K,5%
DDR1_DQS_ECC
DDR1_DQSN_ECC
VDD_DDR
U11-5
AM572x
DDR1_A14 AE17
DDR1_A3 AB19
DDR1_A13 AF18
DDR1_RASN AF20
DDR1_BA2 AB18
DDR1_A1 AC19
DDR1_BA1 AE18
DDR1_BA0 AF17
DDR1_A2 AC20
DDR1_A12 AC21
DDR1_A15 AD18
DDR1_A10 AD21
DDR1_A0 AD20
DDR1_A7 AE21
DDR1_A5 AH22
DDR1_CASN AC18
DDR1_A11 AD22
DDR1_A8 AF22
DDR1_A9 AE22
DDR1_A6 AG23
DDR1_NCK AH24
DDR1_WEN AH21
DDR1_RST AG21
DDR1_D0
AF25
DDR1_D1
AF26
DDR1_D14
AC24
DDR1_D11
AF28
DDR1_D8
AC23
DDR1_D10
AG27 DDR1_D9
AF27
DDR1_D15
AD25
DDR1_D30
AA25
DDR1_D21
Y19
DDR1_D23
Y20
DDR1_D29
AA26
DDR1_D3
AH26
DDR1_D26
Y23
DDR1_D31
AA28
DDR1_D27
AA24
DDR1_ECC_D4
Y25
DDR1_DQM2
AC26
DDR1_DQS2
AD27
DDR1_D24
AA23
DDR1_DQSN2
AD28
DDR1_D25
Y22
DDR1_DQM3
AA27
DDR1_D2
AG26
DDR1_D22
AB27
DDR1_D18
AB28
DDR1_D4
AF24
DDR1_D5
AE24
DDR1_D6
AF23
DDR1_D7
AE23
DDR1_D13
AC25 DDR1_D12
AE26
DDR1_ECC_D7
Y26
DDR1_DQM1
AB23
DDR1_DQM0
AD23
DDR1_D28
Y24
DDR1_DQS_ECC
V27
DDR1_DQS1
AE27
DDR1_DQSN0
AG25
DDR1_DQS3
Y28
DDR1_D20
AC27
DDR1_DQSN_ECC
V28
DDR1_DQSN1
AE28
DDR1_DQS0
AH25
DDR1_DQSN3
Y27
DDR1_D19
AC28
DDR1_ECC_D1
V23
DDR1_ECC_D5
V24
DDR1_ECC_D6
V25
DDR1_DQM_ECC
V26
DDR1_D16
V20
DDR1_D17
W20
DDR1_ECC_D0
W22
DDR1_ECC_D3
W23
DDR1_CK AG24
DDR1_CKE AG22
DDR1_A4 AF21
DDR1_CS0N AH23
DDR1_VREF0 Y18
DDR1_ODT0 AE20
DDR1_ECC_D2
W19
GPIO7_11 A22
DDR1_D0
21
DDR1_D3
21 DDR1_D2
21 DDR1_D1
21
DDR1_D5
21 DDR1_D4
21
DDR1_D8
21
DDR1_D7
21 DDR1_D6
21
C273
0.1uF/201
DDR1_D11
21 DDR1_D10
21 DDR1_D9
21
DDR1_D13
21 DDR1_D12
21
DDR1_D16
21
DDR1_D15
21 DDR1_D14
21
DDR1_D19
21 DDR1_D18
21 DDR1_D17
21
DDR1_D21
21 DDR1_D20
21
DDR1_D24
21
DDR1_D23
21 DDR1_D22
21
DDR1_D27
21 DDR1_D26
21 DDR1_D25
21
DDR1_D29
21 DDR1_D28
21
DDR1_D31
21 DDR1_D30
21
DDR1_DQM1
21
DDR1_DQM2
21
DDR1_DQM3
21
DDR1_DQM0
21
R333
4.7K
DDR1_CKE
DDR_VREFSTL1
DDR1_WEN 21,24
DDR1_ODT0 21,24
DDR1_BA0 21,24
DDR1_RST 21
DDR1_A14 21,24
DDR1_BA2 21,24
DDR1_BA1 21,24
DDR1_A2 21,24
DDR1_A13 21,24
DDR1_A12 21,24
DDR1_A8 21,24
DDR1_A6 21,24
DDR1_A1 21,24
DDR1_A10 21,24
DDR1_A0 21,24
DDR1_A9 21,24
DDR1_A7 21,24
DDR1_A5 21,24
DDR1_A11 21,24
DDR1_A4 21,24
DDR1_A3 21,24
DDR1_CLK0N 21,24
DDR1_CLK0 21,24
DDR1_CSN0 21,24
DDR1_A15 21,24
DDR1_CKE 21,24
DDR1_DQS021
DDR1_RASN 21,24
DDR1_CASN 21,24
DDR1_DQSN021
DDR1_DQS221
DDR1_DQS121
DDR1_DQSN221
DDR1_DQSN121
DDR1_DQSN321 DDR1_DQS321
DDR_VREFSTL1
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 58 of 88
4.6.4 DDR3L Connections
The figure below shows the connections to the DDR3 memory device. One device has
connections to DDRD0 to D15. The other device has connections to DDRD16 to D31 as
shown below. You will notice that the DDR data pins are scrambled. This is done to
facilitate the layout of the board and provide for an optimal layout. Address line
DDR1_A15 is not used in the default configuration as shipped. If desired a 1G DDR3
part can be used, which will double the memory on the board.
Figure 52. DDR3L Memory Device connections
R275 240,1%
DDR1_RST
DDR1_A12
DDR1_A13
DDR1_BA2
DDR1_BA0
DDR1_BA1
DDR1_A6
DDR1_A2
DDR1_A1
DDR1_A8
DDR1_A14
DDR1_A9
DDR1_A5
DDR1_A10
DDR1_A0
DDR1_A7
DDR1_A11
DDR1_A4
DDR1_A3
C276
0.22uF/201
C278
0.22uF/201
DDR1_D18 19
DDR1_D23 19
DDR1_D22 19
DDR1_D17 19
DDR1_D19 19
DDR1_D21 19
DDR1_D20 19
DDR1_D28 19
DDR1_D25 19
DDR1_D16 19
DDR1_D24 19
DDR1_D29 19
DDR1_D26 19
DDR1_D27 19
DDR1_D31 19
DDR1_D30 19
DDR1_RASN
DDR1_CASN
DDR1_CSN0
DDR1_WEN
DDR1_ODT0
VDD_DDR VDD_DDR
DDR_VREFSTL1
DDR1_DQM3 19
DDR1_DQM2 19
DDR1_DQS2 19
DDR1_DQS3 19
DDR1_DQSN3 19
DDR1_DQSN2 19
ZQ1_HI
DDR1_CKE
DDR1_CLK0N
DDR1_CLK0
DDR1_A15 U24
256MBx16 DDR3L
A12
N7
A11
R7
A10
L7
A9
R3
A8
T8
A7
R2
A6
R8
A5
P2
A4
P8
A3
N2
A2
P3
A1
P7
A0
N3
BA2
M3
BA1
N8
BA0
M2
A13
T3 A14
T7
ODT
K1
CS#
L2
CAS#
K3 RAS#
J3
WE#
L3
CKE
K9
CK
J7
CK#
K7
UDQS# B7
UDQS C7
LDQS# G3
LDQS F3
UDM D3
LDM E7
VDD.1
B2
VDD.2
D9
VDD.3
G7
VDD.4
K8
VDD.5
N1
VDDQ.1
A1
VDDQ.2
A8
VDDQ.3
C1
VDDQ.4
C9
VDDQ.5
D2
VDDQ.6
E9
VDDQ.7
F1
VDDQ.8
H2
VDDQ.9
H9
VDDL
K2
VREFCA M8
DQ15 A3
DQ14 B8
DQ13 A2
DQ12 A7
DQ11 C2
DQ10 C8
DQ9 C3
DQ8 D7
DQ7 H7
DQ6 G2
DQ5 H8
DQ4 H3
DQ3 F8
DQ2 F2
DQ1 F7
DQ0 E3
VSS.1 A9
VSS.2 B3
VSS.3 E1
VSS.4 G8
VSS.5 J8
VSSQ.1 B1
VSSQ.2 B9
VSSQ.3 D1
VSSQ.4 D8
VSSQ.5 E2
VSSQ.6 E8
VSSQ.7 F9
VSSQ.8 G1
VSSQ.9 G9
VSSDL J2
VREFDQ H1
ZQ L8
RSTn
T2
VDD.6
N9
VDD.7
R1
VDD.8
R9
VSS.6 M1
VSS.7 M9
VSS.8 P1
VSS.9 P9
VSS.10 T1
VSS.11 T9
NC.M7/A15
M7
NC.L9
L9
NC.L1
L1
NC.J9
J9
NC.J1
J1
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 59 of 88
4.7 4G eMMC
A single 4GB embedded MMC (eMMC) device is on the board. The device connects to
the MMC1 port of the processor, allowing for 8bit wide access. This is the secondary
boot device but as long as a bootable uSD is not inserted, it will be the primary boot
source. The expectation is that this will be the primary boot source for the board.
Figure 21 below is the connection schematic of the eMMC to the processor.
Figure 53. eMMC Circuitry
4.8 EEPROM
The board has an EEPROM for the storing of information about the board. This
information can be used by the software to determine the board’s information such as
name and revision. When J2 is installed the EEPROM can be written to. J2 is not
installed to prevent writing over the EEPROM information.
Figure 54. EEPROM Circuitry
R259
DNI,0402
R258
DNI,0402
RSTOUTn
3,8,16,26,27
R256
DNI,0402
R257
DNI,0402
R255
DNI,0402
R254
DNI,0402
R253
DNI,0402
R251
DNI,0402
R250
DNI,0402
R252
DNI,0402
R249
0,1%
MMC2_CMD
MMC2_DAT4
MMC2_DAT1
C266
0.22uF/201
C269
0.22uF/201
U11-13
AM572x
MMC2_DAT0 J4
MMC2_DAT1 J6
MMC2_DAT2 H4
MMC2_DAT3 H5
MMC2_DAT4 K7
MMC2_DAT5 M7
MMC2_DAT6 J5
MMC2_DAT7 K6
MMC2_CLK J7
MMC2_CMD H6
U22
MEM_MNAND_4GB
DAT0
A3
DAT1
A4
DAT2
A5
DAT3
B2
DAT4
B3
DAT5
B4
DAT6
B5
DAT7
B6
VCCI C2
VSSQ4 C4
VCCQ4 C6
VCC3 E6
VSS2 E7
VSS5 N5
VCC2 F5
VSS1 G5
VSS3 H10
VSS4 K8
VCC1 K9
VCCQ5 M4
CMD
M5 CLK
M6
VSSQ1 N2
VCCQ3 N4
VCCQ1 P3
VSSQ3 P4
VCCQ2 P5
VSSQ2 P6
RST
K5
VCC0 J10
MMC2_3V3
VDD_3V3 MMC2_3V3
C268
4.7uF,6.3V
C267
2.2uF,6.3V
MMC2_CLK
EMMC_VDD1.1
VDD_3V3
MMC2_DAT3
MMC2_DAT2
MMC2_DAT0
MMC2_DAT7
MMC2_DAT6
MMC2_DAT5
C270
0.1uf,16V
WRITE ENABLE
U8
MEM_24WC256_8SOIC
A0 1
VCC
8
VSS 4
NC 3
SCL
6
SDA
5A1 2
WP
7
R37 10K,1%
C81
0.1uf,16V
I2C1_SDA
2,3,15,16 I2C1_SCL
2,3,15,16
VDD_3V3
EEWP
VDD_3V3
J2
HDR_1x1_M_.1
1 2
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 60 of 88
4.9 uSD Connector
The board is equipped with a single microSD connector to act as the primary boot source
for the board if inserted and configured as bootable. There is no boot button as on earlier
boards. The uSD is the default boot option so if it is inserted it will boot from the uSD
slot if a bootable source is present. The figure below is the circuitry for the uSD card
connector.
Figure 55. uSD Circuitry
4.10 Boot Modes
As supplied, the board is strapped to boot from the uSD card as default, followed by the
eMMC. If desired, the user can remove the resistors and add jumpers to implement an
option based boot mode scenario.
The Table 5 below shows the modes selected by the three jumpers.
Table 5. Boot Options
D21
TPD2E001DRL
IO1 3
IO2 5
VCC
1GND
4
NC.2
2
D22
TPD2E001DRL
IO1 3
IO2 5
VCC
1GND
4
NC.2
2
C271
10uF,6.3V
D23
TPD2E001DRL
IO1 3
IO2 5
VCC
1GND
4
NC.2
2
VDD_SD
VDD_SD
VDD_SD
CON_MMC1_DAT0
VDD_3V3
MMC1_DAT2
MMC1_DAT0
MMC1_CMD
MMC1_CLK
MMC1_DAT3
MMC1_DAT1 microSD
P12
SCHA5B0200
DAT2
1
CD/DAT3
2
CMD
3
VDD
4
CLOCK
5
VSS
6
DAT0
7
DAT1
8
GND 9
CD 10
GND3 11
GND4 12
GND5 13
GND6 14
GND7 15
GND8 16
CON_MMC1_CLK
CON_MMC1_DAT1
MMC1_SD_CD
CON_MMC1_DAT3
CON_MMC1_CMD
CON_MMC1_DAT2
R266 33,5%
R268 33,5%
R267 33,5%
R269 33,5%
R271 33,5%
R270 33,5%
R272
10K,1%
U11-13
AM572x
MMC1_CLK W6
MMC1_SDCD W7
MMC1_CMD Y6
MMC1_DAT3 Y3
MMC1_DAT2 AA5
MMC1_DAT0 AA6
MMC1_DAT1 Y4
R264
10K,1%
R265
10K,1%
R262
10K,1%
R263
10K,1%
R260
10K,1%
R261
10K,1%
C272
0.1uf,16V
D20
TPD2E001DRL
IO1 3
IO2 5
VCC
1GND
4
NC.2
2
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 61 of 88
The figure below is the schematic of the boot option jumpers. By default, the board does
not have the headers loaded and there are resistors that short out pins 2 and 3 of each of
the jumpers.
Figure 56. Boot Pin Settings
The boot pins are also routed to the expansion headers. In the event an expansion board
was created, the boot modes could be overridden. Care should be taken if thee pins are
used for other functions, that they not be driven during power up when they are sampled
for the boot setting.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 62 of 88
4.11 I2C1 Bus
The I2C1 bus is only connected on the board and does not appear on the expansion
headers. There are four devices connected to this bus:
Board ID EEPROM
Temperature Sensor
TPS65074 PMIC
The figure below shows the connection between the processor and the devices.
Figure 57. I2C1 Bus
The table below provides the addresses of each of the devices on the bus.
Table 6. I2C1 Device Address
DEVICE
ADDRESS
FUNCTION
TPS65039
0x58
Power Registers
TPS65039
0x59
Power resources
TPS65039
0x5A
Trimming and test
TPS65039
0x5B
OTP
TPS65039
0x12
DVS
EEPROM
0x50
Board information
TMP102
0x48
Temperature
AIC3104
0x18
Audio CODEC
U8
MEM_24WC256_8SOIC
A0 1
VCC
8
VSS 4
NC 3
SCL
6
SDA
5A1 2
WP
7
U11-7
AM572x
I2C1_SCL C20
I2C1_SDA C21
U4
TMP102AIDRLT
ADD0 4
V+
5
GND
2
ALERT 3
SCL
1
SDA
6
C15
0.1uf,16V
VDD_3V3
I2C1_SCL
2,7,15,16 I2C1_SDA
2,7,15,16
VDD_3V3
U5B
I2C1_SDA_SDI
L2
I2C1_SCL_SCK
L1
I2C2_SDA_SDO
H8
I2C2_SCL_SCE
M3
R17
2.2K,1%
R16
2.2K,1%
PMIC_SCE
PMIC_SDO
R19 DNI,0402
R18 DNI,0402
U18
TLV320AIC3104
SCL
8
SDA
9
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 63 of 88
4.12 Ethernet
There a two 10/100/1000 Ethernet ports on the board that connect to the RGMII
interfaces of the processor. They are accessible via a stacked RJ45 connector.
Figure 58 below is the block diagram Ethernet section.
Figure 58. Ethernet System Block Diagram
The external circuitry is the same for both of the Ethernet PHY devices in the following
sections only port 0 will be described.
AM57xx
Processor
Micrel
PHY
RGMII0
Micrel
PHY
RJ45
RJ45
RGMII1
INT
IN
T
10/100/1000
10/100/1000
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 64 of 88
4.12.1 Ethernet 0 Processor Interface
Figure 59 below shows the connections between the Ethernet 0 PHY and the RGMII
interface of the processor.
Figure 59. Ethernet 0 Processor Interface
Resistors R72-R77 are used to set the default modes of the PHY. You can refer to the
KSZ903RNX datasheet for more information on these settings.
The PHY uses a 25MHz crystal to generate the required clocks.
A series of 22ohm resistors are used in series with the RX signals from the PHY to the
processor to prevent reflections. Zero ohm resistors are supplied in the TX path to
provide test points if needed. They could also be used to minimize reflections if required.
EMAC(0)_RXD2
EMAC(0)_RXD0
R_EMAC[0]_RXD3
R_EMAC[0]_RXD2
R_EMAC[0]_RXD1
E0_XO
EMAC[0]_RXC
EMAC(0)_RXD3
EMAC(0)_RXD1
ETH0_3V3 ETH0_3V3
R84 0,1%
R94
DNI,0402
R86 0,1%
R85 0,1%
R88 0,1%
R87 0,1%
R89 0,1%
ETH0_3V3
R96
0,1%
E0_RST
R9212.1K,1%
R78 22,5%
R79 22,5%
VDD_3V3
R80 22,5%
R81 22,5%
R82 22,5%
R83 22,5%
R71
1K,5% R70
1K,5%
EMAC[0]_RXCTL
R73
1K,5% R72
1K,5%
R95
100K,1%,DNI
R_EMAC[0]_RXC
C217 18pF,50V
C218 18pF,50V
R77
10K,1% R76
10K,1% R75
10K,1%
ENET0_INTn
15
KSZ9031RNX
48-pin QFN
U14
KSZ9031RNX
NC1
13
LED2 15
DVDDH5 16
LED1 / PME_N1 17
DVDDL1 14
TXD0
19
TXD1
20
TXD2
21
TXD3
22
DVDDL5 18
DVDDL4 23
GTX_CLK
24 TX_EN
25
DVDDL6 26
RXD3
27
VSS
29
DVDDL2 30
RXD1
31 RXD0
32 RX_DV
33
DVDDH3 34
RX_CLK
35
MDC
36 MDIO
37
INT_N / PME_N2
38
DVDDL3 39
DVDDH4 40
CLK125_NDO
41 RESET_N
42
LDO_O 43
XO
45 XI
46
NC
47
ISET
48
AVDDH1 1
TXRXP_A 2
TXRXM_A 3
TXRXP_B 5
TXRXM_B 6
TXRXP_C 7
TXRXM_C 8
TXRXP_D 10
TXRXM_D 11
AVDDH2 12
RXD2
28
AVDDL_PLL 44
P_GND
49
AVDDL2 4
AVDDL1 9
R74
10K,1%
E0_ISET
R_EMAC[0]_RXD0
R93
10K,1%
ENET_PORZ
8,12
R389
4.7K
ETH0_3V3
U14_41
R316
0,1%,DNI
MDIO_DATA 12
ETH_RESETn 12
MDIO_CLK 12
MDIO_CLK
MDIO_DATA
E0_XI
C219
10uF,DNI
ETH_RESETn
Y5
25MHz
12
R_EMAC[0]_TXD1
R_EMAC[0]_TXD2
R_EMAC[0]_TXD3
R_EMAC[0]_TXCTL
EMAC[0]_TXD3
EMAC[0]_TXC
EMAC[0]_TXCTL R_EMAC[0]_TXC
R_EMAC[0]_TXD0EMAC[0]_TXD0
EMAC[0]_TXD1
EMAC[0]_TXD2
MDIO_DATA
R_EMAC[0]_RXCTL
MDIO_CLK
U11-3
AM572x
RGMII0_RXD0 W2
RGMII0_RXD1 Y2
RGMII0_TXD0 U6
RGMII0_TXCTL V9
RGMII0_TXD2 U7
MDIO_MCLK V1
RGMII0_RXD2 V3
RGMII0_RXD3 V4
MDIO_D U4
GPIO3_17 U3
RGMII0_TXD3 V7
RGMII0_TXD1 V6
RGMII0_TXC W9
RGMII0_RXCTL V5
RGMII0_RXC U5
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 65 of 88
An optional reset signal, GPIO3_17 is provided if there is a need for an asynchronous
reset of the PHY from the processor. This is not enabled by default. It also connects to
Ethernet 1 port as well.
4.12.2 Ethernet PHY Power
Figure 60 shows the power connections to the KSZ9031RNX PHY.
Figure 60. Ethernet Power Diagram
An external FET is required to generate the 1.2V required by the PHY core. The FET is
controlled by the PHY itself. The FET requires some heat sink function which is
provided by the PCB layout in the form of added copper.
All power for the PHY is derived from the VDD_3V3 rail, the main board power. Filters
are provided on all rails to minimize noise.
ETH0_3V3
C209
0.1uf,16V
ETH0_3V3
C213
0.1uf,16V
C212
10uF,6.3V
C208
10uF,6.3VFB2
150OHM800mA
1 2
C210
10uF,6.3V
FB1
150OHM800mA
1 2
FB4
150OHM800mA
1 2
Q1
FDT434P
E0_DVDDL
ETH0_LDO
FB3
150OHM800mA
1 2
C205
47uF,6.3V,1206
KSZ9031RNX
48-pin QFN
U14
KSZ9031RNX
NC1
13
LED2 15
DVDDH5 16
LED1 / PME_N1 17
DVDDL1 14
TXD0
19
TXD1
20
TXD2
21
TXD3
22
DVDDL5 18
DVDDL4 23
GTX_CLK
24 TX_EN
25
DVDDL6 26
RXD3
27
VSS
29
DVDDL2 30
RXD1
31 RXD0
32 RX_DV
33
DVDDH3 34
RX_CLK
35
MDC
36 MDIO
37
INT_N / PME_N2
38
DVDDL3 39
DVDDH4 40
CLK125_NDO
41 RESET_N
42
LDO_O 43
XO
45 XI
46
NC
47
ISET
48
AVDDH1 1
TXRXP_A 2
TXRXM_A 3
TXRXP_B 5
TXRXM_B 6
TXRXP_C 7
TXRXM_C 8
TXRXP_D 10
TXRXM_D 11
AVDDH2 12
RXD2
28
AVDDL_PLL 44
P_GND
49
AVDDL2 4
AVDDL1 9
ETH0_1.2V
VDD_3V3
E0_PLL
E0_AVDDL
C214
47uF,6.3V,1206
C211
0.1uf,16V
C206
0.1uf,16V
C207
0.1uf,16V
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 66 of 88
4.12.3 Ethernet 0 RJ45 Connections
Figure 61 is the connections from the PHY to the RJ45. Each of the pairs of signals an
run as differential pairs on the board layout.
Figure 61. Ethernet RJ45 Interface
Two LEDS, one red and one green, are located in the RJ45 connector and are driven by
the LED outputs of the PHY.
P0_TRD[1]P
P0_TRD[0]N
P0_TRD[2]N
P0_TRD[2]P
P0_TRD[0]P
P0_TRD[1]N
P0_TRD[3]N
ETH0_3V3
R331 1M,1%
J3-D6
P0_TRD[3]P
R69
220,5%
J3-D8
R68
220,5%
VDD_3V3
E0_YEL
E0_GRN
KSZ9031RNX
48-pin QFN
U14
KSZ9031RNX
NC1
13
LED2 15
DVDDH5 16
LED1 / PME_N1 17
DVDDL1 14
TXD0
19
TXD1
20
TXD2
21
TXD3
22
DVDDL5 18
DVDDL4 23
GTX_CLK
24 TX_EN
25
DVDDL6 26
RXD3
27
VSS
29
DVDDL2 30
RXD1
31 RXD0
32 RX_DV
33
DVDDH3 34
RX_CLK
35
MDC
36 MDIO
37
INT_N / PME_N2
38
DVDDL3 39
DVDDH4 40
CLK125_NDO
41 RESET_N
42
LDO_O 43
XO
45 XI
46
NC
47
ISET
48
AVDDH1 1
TXRXP_A 2
TXRXM_A 3
TXRXP_B 5
TXRXM_B 6
TXRXP_C 7
TXRXM_C 8
TXRXP_D 10
TXRXM_D 11
AVDDH2 12
RXD2
28
AVDDL_PLL 44
P_GND
49
AVDDL2 4
AVDDL1 9
R90
1K,5%
R91
1K,5%
C215 0.1uf,16V
J3_SHLD
P5
LPJG17561BGNL Dual RJ45 10/100/1000
1
2
3
4
5
6
7
8
9
10
D1
D2
D3
D4
SHLD1
SHLD2
M1
M2
20
19
18
17
16
15
14
13
12
11
D5
D6
D7
D8
SHLD3
SHLD4
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 67 of 88
4.12.4 Ethernet 1 RJ45 Connections
Figure 37 is the connections from the PHY to the RJ45. Each of the pairs of signals are
run as differential pairs on the board layout.
Figure 62. Ethernet 1 RJ45 Interface
Two LEDS, one red and one green, are located in the RJ45 connector and are driven by
the LED outputs of the PHY.
P5
LPJG17561BGNL Dual RJ45 10/100/1000
1
2
3
4
5
6
7
8
9
10
D1
D2
D3
D4
SHLD1
SHLD2
M1
M2
20
19
18
17
16
15
14
13
12
11
D5
D6
D7
D8
SHLD3
SHLD4
ETH1_3V3
R116
1K,5%
R117
1K,5%
KSZ9031RNX
48-pin QFN
U15
KSZ9031RNX
NC1
13
LED2 15
DVDDH5 16
LED1 / PME_N1 17
DVDDL1 14
TXD0
19
TXD1
20
TXD2
21
TXD3
22
DVDDL5 18
DVDDL4 23
GTX_CLK
24 TX_EN
25
DVDDL6 26
RXD3
27
VSS
29
DVDDL2 30
RXD1
31 RXD0
32 RX_DV
33
DVDDH3 34
RX_CLK
35
MDC
36 MDIO
37
INT_N / PME_N2
38
DVDDL3 39
DVDDH4 40
CLK125_NDO
41 RESET_N
42
LDO_O 43
XO
45 XI
46
NC
47
ISET
48
AVDDH1 1
TXRXP_A 2
TXRXM_A 3
TXRXP_B 5
TXRXM_B 6
TXRXP_C 7
TXRXM_C 8
TXRXP_D 10
TXRXM_D 11
AVDDH2 12
RXD2
28
AVDDL_PLL 44
P_GND
49
AVDDL2 4
AVDDL1 9
P1_TRD[1]N
P1_TRD[3]N
P1_TRD[1]P
P1_TRD[0]N
P1_TRD[2]N
P1_TRD[2]P
E1_GRN
E1_YEL
P1_TRD[3]P
P1_TRD[0]P
R98
220,5%
J3_D2
R97
220,5%
J3_D4
VDD_3V3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 68 of 88
4.13 HDMI
There is a single HDMI interface present on the processor. No external framer or
circuitry other than protection circuitry is required. This interface is capable of doing
1920x180 at 60 FPS.
Figure 63 below is the HDMI interface circuitry.
Figure 63. HDMI Interface Circuitry
Each of the output pairs are filtered using chokes FL1-FL4 specifically designed for
HDMI emissions suppression. This is to help on the FCC and CE emissions testing. Also
provided is ESD protection in the form of D12-D19.
U21 provides for the level shifting interface to the HDM connector. It also provides
55mA at 5V to power the EDID EEPROM on the monitor. It is not intended to provide
power for a HDMI to VGA converter.
The two pullup resistors for the I2C are not populated because the level shifter has its
own internal pullups.
A full size HDMI connector is used as the interface to the display.
VDD_3V3
C265
4.7uF,6.3V
P11
HDMI-RA-19-TYPEA
D2 SHIELD
2D2+
1
D2-
3
D1 SHIELD
5D1+
4
D1-
6
D0 SHIELD
8D0+
7
D0-
9
CK SHIELD
11 CK+
10
CK-
12
NC.14
14 CE REMOTE
13
DDC CLK
15
DDC DATA
16
+5V
18
HP DET
19
MTG1
MTG1
MTG2
MTG2
MTG3
MTG3
MTG4
MTG4
GND
17
HDMI_CT_HPD
HDMI_LS_OE
P11_ESD
RHDMI_TX1-
RHDMI_TX1+
RHDMI_TX2-
RHDMI_TX2+
U11-15
AM572x
HDMI1_DATA0Y AH17
HDMI1_DATA1X AG18
HDMI1_DATA1Y AH18
HDMI1_CLOCKX AG16
HDMI1_CLOCKY AH16
HDMI1_DATA0X AG17
HDMI1_DATA2X AG19
HDMI1_DATA2Y AH19
VSSA_HDMI.2
AD19
VSSA_HDMI.1
AE19
HDMI_HPD B21
HDMI_CEC B20
HDMI1_DDC_SDA F17
HDMI1_DDC_SCL C25
GPIO7_10 A24
GPIO6_28 Y9
R387 1M,1%
C441 0.1uf,16V
R246
4.7K,DNI R245
4.7K,DNI
5V0
HDMI_HPD_B
HDMI_SCL_B
HDMI_SDA_B
VDD_3V3
HDMI_CEC_A
D14
TPD1E05U06
I1
G
2
D12
TPD1E05U06
I1
G
2
D13
TPD1E05U06
I1
G
2
D16
TPD1E05U06
I1
G
2
D15
TPD1E05U06
I1
G
2
D17
TPD1E05U06
I1
G
2
D19
TPD1E05U06
I1
G
2
D18
TPD1E05U06
I1
G
2
HDMI_TX1-
HDMI_TX0-
HDMI_TX0+
HDMI_TXC-
HDMI_TXC+
HDMI_TX2-
HDMI_TX2+
HDMI_TX1+
HDMI_CEC_B
HDMI_SDA_B
HDMI_SCL_B
HDMI_HPD_B
HDMI_CEC_B
VDD_3V3
HDMI_5VOUT
HDMI_CT_HPD
HDMI_LS_OE
HDMI1_DDC_SDA
HDMI1_DDC_SCL
FL1
DLW21SN900HQ2
1
4 3
2
FL2
DLW21SN900HQ2
1
4 3
2
FL3
DLW21SN900HQ2
1
4 3
2
FL4
DLW21SN900HQ2
1
4 3
2
HDMI_HPD_A
HDMI_CEC_A
R247 10K,1%,DNI
R248 10K,1%
5V0
VDD_3V3
U21
TPD12S016 24UQFN
SCL_A
1
SDA_A
2CEC_A
24 HPD_A
3
CEC_B 6
HPD_B 9
SCL_B 7
SDA_B 8
VCCA
23
LS_OE
4CT_HPD
11
5V_OUT 12
VCC_5V
10
D1+ 20
D1- 19
D2+ 22
D2- 21
D0+ 17
D0- 16
CLK+ 15
CLK- 14
GND1
5
GND3
18 GND2
13
55mA MAX
C264
0.1uf ,16V
RHDMI_TX0+
RHDMI_TX0-
RHDMI_TXC-
RHDMI_TXC+
R242
DNI,0402
HDMI_HPD_A
R241
DNI,0402
R237
DNI,0402
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 69 of 88
4.1 Audio
There are two sources of audio from the board, the HDMI interface or the stereo
CODEC. Only the CODEC will support Audio input. This section covers the stereo
CODEC.
4.1.1 Processor Interface
Figure 64 below shows the interface between the processor and the AIC3104.
Figure 64. Stereo CODEC Processor Interface
The AIC3104 requires a master clock (MCLK) that is supplied by the processor using
the XREF_CLK1 pin. Depending on the requirements, this clock can be any range from
512KHz to 50MHz. The most likely frequencies to be used are 12MHZ, 13MHZ,
16MHz, 19.2MHZ or 19.68MHZ.
Connection to the processor uses the McASP3 I2S interface.
RSTOUTn signal provides a reset to the AIC3014 whenever the system is reset.
The I2C1 interface is used to change the internal registers of the AIC3104. The I2C
address is 0x18.
R224 10,5%
R225 10,5%
R227 10,5%
R229 10,5%
R223 22,5%
U18
TLV320AIC3104
RESETn
31
SCL
8
SDA
9
MCLK
1
WCLK
3
BCLK
2
DIN
4
DOUT
5
U11-17
AM572x
MCASP3_ACLKX B18
MCASP3_FSX F15
MCASP3_AXR0 B19
MCASP3_AXR1 C17
XREF_CLK1 E17 I2C1_SDA
2,3,7,15 I2C1_SCL
2,3,7,15
RSTOUTn
3,8,18,26,27
AIC_MCLK
AIC_WCLKR
AIC_BCLKR
AIC_MCLKR
AIC_DOUTR
AIC_DINR
AIC_WCLK
AIC_BCLK
AIC_DOUT
AIC_DIN
R231
20K,1%
R232
20K,1%
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 70 of 88
4.1.2 Power Circuitry
Figure 65 below is the power circuitry for the AIC3104.
Figure 65. AIC3104 Power Circuitry
The primary power source is the VDD_3V3 rail. You will notice a filter is used on the
rail in order to keep the noise down on the audio I/O. After the filter the rail becomes the
VDAC_3CV3 rail. This rail is then run through ferrite beads to create the AVDD_DAC,
IOVDD, and DRVDD rails.
The core circuitry inside the AIC3104 requires a 1.8V power rail on the DVDD pin. The
TPS77018 device generates that voltage from the VDAC_3V3 rail.
There is a separate ground plane under the CODEC that connects to the system ground at
a single point through FB9, a ferrite bead, in order to minimize any noise that might be
present in the ground plane.
AGND_AUD
AGND_AUD
U18
TLV320AIC3104
AVDD_DAC
25
DRVDD
18
IOVDD
7
DVDD
32
DVSS
6
AVSS_ADC
17
AVSS_DAC
26
DRVSS
21
DRVDD
24
PAD
33
VDAC_3V3
VDAC_3V3
VDAC_3V3
VDAC_3V3 U19
TPS77018DBV
IN
1
GND
2
ENn
3
NC/FB 4
OUT 5
FB9
150OHM800mA
1 2
C254
10uF,6.3V
C257
10uF,6.3V
C249
10uF,6.3V
VDD_3V3
C260
1uF,4V,0201
L13
BLM21PG221SN1D
L15
BLM21PG221SN1D
L14 BLM21PG221SN1D
C253
0.1uf,16V
C252
0.1uf,16V
C258
0.1uf,16V C259
0.1uf,16V
C262
0.1uf,16V
C247
0.1uf,16V
L12
FLT_HIFREQ_.47UF
1 3
2
C248
0.1uf,16V
C261
4.7uF,6.3V
AIC_IOVDD3.3
AIC_DRVDD3.3
AIC_DVDD
AIC_AVDD_DAC3.3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 71 of 88
4.1.3 Audio In/Out
Figure 66 is the audio jacks for the Audio in and out.
Figure 66. Stereo CODEC Audio Connections
Each of the connectors is a 3.5mm stereo jack. D8-D11 provides ESD protection for the
user connections. The termination signals on the interfaces are connected to a single point
ground. In the layout is a single dedicated ground for the CODEC circuitry. It is
connected to the system ground through FB9.
R230 10,5%
R233 10,5%
U18
TLV320AIC3104
RESETn
31
SCL
8
SDA
9
MCLK
1
WCLK
3
BCLK
2
DIN
4
DOUT
5
LEFT_LOP 27
LEFT_LOM 28
RIGHT_LOP 29
RIGHT_ROM 30
HPLOUT 19
HPROUT 23
HPRCOM 22
HPLCOM 20
IN2R 16
MICBIAS 15
IN2L 14
IN1LP 10
IM1LM 11
IN1RP 12
IN1RM 13
AVDD_DAC
25
DRVDD
18
IOVDD
7
DVDD
32
DVSS
6
AVSS_ADC
17
AVSS_DAC
26
DRVSS
21
DRVDD
24
PAD
33
RIGHT_IN
C255 2.2uF,6.3V
C256 2.2uF,6.3V
FB9
150OHM800mA
1 2
D8
PESD0603-240
D9
PESD0603-240
D10
PESD0603-240
D11
PESD0603-240
I2C1 ADDRESS 0X18
C251 47uF,6.3V,1206
C250 47uF,6.3V,1206
R235
20K,1%
R234
20K,1%
R226
20K,1%
R228
20K,1%
AUDIO_R RIGHT_OUT
LEFT_OUT
AUDIN_L LEFT_IN
P8
SJ1-3524NG
1
2
3
4
AUDIN_RR
AUDIN_R AUDIN_RL
AUDIO_L
P9
SJ1-3524NG
1
2
3
4
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 72 of 88
4.2 USB 2.0 Client Port
The board has a single USB OTG port that is configured as a Client port by default. The
Figure 67 shows the design of the circuit. D40 provides the ESD protection for the
signals.
If you look at the full schematic you will see an option for routing these signals to an
expansion board. You can swap R321 and R320, putting the port into a host mode. If you
want to use it as an OTG port, an ID pin would need to be provided to the processor via a
GPIO pin. There is no dedicate ID pin on the processor.
Figure 67. USB Client Port
There is a VBUS detection circuit on the board. You will notice that it is isolated and not
used.. This was put into the design to compensate for the function not working correctly
in the PMIC> Once the PMIC was fixed, the circuit was no longer needed. In future
revisions, this circuitry will be removed from the assembly. It is left there for now, just in
case the PMIC falls ill again. Figure 68 shows this circuitry and the isolation points.
The USB2_VBUS connects direct to the PMIC and the PMIC_VBUS_DET is the output
from the PMIC confirming the detection.
R21127,1% R21027,1%
P7_SHLD
P7
Micro USB-AB
D- 2
D+ 3
VB 1
ID 4
G2
S1 G3
S2
G1 5
G5 S4
G4 S3
U11-10
AM572x
USB2_DM AF11
USB2_DP AE11
GPIO7_24 E25
USB2_DP
USB2_DM
R386 1M,1%
C231 0.1uf,16V
D40
TPD2E001DRL
IO1 3
IO2 5
VCC
1
GND
4NC.2
2
USB1_VBUS
USBSP_DP
USBSP_DM
R320
10K,1%,DNI
R321
10K,1%
USB2_ID
VDD_3V3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 73 of 88
Figure 68. Alternate VBUS Detect Circuitry
R320 0,1%,DNI USB2VBUS_EXP 27
R31
0,1%,DNI
U42
SN74LVC1G06DCK
A
2Y4
GND
3VCC 5
NC
1
VDD_3V3
R408
47K,1%
R409 620K
VBUS_DET 13
R410 330K
VDD_3V3
Q7
BSS138/SOT
R413 0,1%,DNI
USB2_VBUS 3
USB2_5V
C495
1uF,30V,0402
R412 0,1%
R415
47K,1%
PMIC_VBUS_DET
3
VDD_3V3
R4140,1%
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 74 of 88
4.3 USB 3.0 and HUB
There are three USB3 ports on the board, implemented by using a USB3 HUB connected
to the processor. The processor only has one USB3 port and requires the HUB to handle
additional ports.
4.3.1 Processor and HUB Interface
Figure 69 shows the main connections between the processor and the HUB.
Figure 69. USB3 and HUB Processor Interface
The USB signals are connected between the HUB and the processor via capacitors. The
TX and RX lines are swapped between the two.
There is not a dedicated ID pin for the ID function, so GPIO7_26 is used for that
function. Pulling it low sets the port to host mode. The I2C3 port is not connected by
default and is not currently being used for processor to HUB communications.
U11-10
AM572x
USB_RXN0 AF12
USB_RXP0 AE12
USB_TXN0 AC11
USB_TXP0 AD11
USB1_DM AC12
USB1_DP AD12
USB1_DRVVBUS AB10
GPIO7_25 C27
I2C3_SDA C14
I2C3_SCL D14
USB1_DM
USB1_DRVVBUS
USB1_DP
USB_SSRXP0
USB_SSRXM0
PUSB_TXP0
PUSB_TXN0 C244 0.1uf,16V
C239 0.1uf,16V
USB_SSTXP0
USB_SSTXM0
PUSB_RXP0
PUSB_RXN0
C241 0.1uf,16V
C242 0.1uf,16V
R205
10K,1%
USB1_ID
U17
TUSB8040A
USB_VBUS
B44
USB_DP_UP
A46
USB_DM_UP
B42
USB_SSRXP_UP
A44
USB_SSRXM_UP
B40
USB_SSTXP_UP
B39
USB_SSTXM_UP
A42
SCL_SMBCLK
B17 SDA_SMBDAT
A19
R392
2.2K,1% R391
2.2K,1%
VDD_3V3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 75 of 88
4.3.2 USB3 Port Power Control
Figure 70 is the power control for the USB3 ports. Each rail is controlled by the USB
HUB. Each voltage rail has filter caps, bulk caps, and a ferrite bead for noise emissions
reduction. Resistors R293 and R298 set the current limit on each of the switches. Ports 1
and 2 are set for the 1200mA charge current. Only port one has that function enabled at
the HUB. The other USB3 port, port 3, is set for 900mA.
Figure 70. USB3 Power Control
The USB4VBUS is in support of the eSATA connector and can deliver 900mA to the
eSATA port.
USB3V
R293
25.5K,1%
C414
0.1uf,16V
+
C413
100uF,10V
USB3VBUS
BATEN0
14 BATEN1
14
OC0
14 OC1
14
BATEN2
14 BATEN3
14
OC2
14 OC3
14
USB_5V
USB4V
U29_7
U30_7
C405
0.1uf,16V
C412
0.1uf,16V
+
C411
100uF,10V
+
C404
100uF,10V
+
C406
100uF,10V
R298
63.4K,1%
L18
BLM21PG221SN1D
C407
0.1uf,16V
USB2V
USB1V USB1VBUS
L17
BLM21PG221SN1D USB2VBUS
L19
BLM21PG221SN1D
L20
BLM21PG221SN1D USB4VBUS
U30
TPS2561DRC
IN1
2
IN2
3
EN1
4
EN2
5
FAULT1
10
FAULT2
6
OUT1 9
OUT2 8
ILIM 7
GND 1
PAD 11
U29
TPS2561DRC
IN1
2
IN2
3
EN1
4
EN2
5
FAULT1
10
FAULT2
6
OUT1 9
OUT2 8
ILIM 7
GND 1
PAD 11
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 76 of 88
4.3.3 USB3 Port Connectors
Figure 71 shows connections to the connectors on the board. The port has ESD
protection on all signals. P13 is a single USB 3.0 connector.
Figure 71. USB Port 1 Connectors
Figure 72 shows the connection for USB3 ports 2 and 3. P15 is a dual stacked UBS 3.0
connector. Each pin has a dedicated ESD device.
Figure 72. USB Port 2 and 3 Connectors
P13
CONN_USB3.0_A
USBVDD
1
D+
3D-
2
RX-
5
RX+
6
GNDD 7
TX-
8
TX+
9
SHLD0 10
GND 4
SHLD1 11
C446 0.1uf,16V
C447 0.1uf,16V
USB_DM0
14 USB_DP0
14
USB_TXM0
14 USB_TXP0
14
USB_RXM0
14 USB_RXP0
14
D25
TPD2EUSB30ADR
D+
1
D-
2GND 3
D35
TPD1E10B06
IO 1
GND
2
D27
TPD2EUSB30ADR
D+
1
D-
2GND 3
D26
TPD2EUSB30ADR
D+
1
D-
2GND 3
TX-
TX+
USB1VBUS
C419
0.1uf,16V
USB2VBUS
D36
TPD1E10B06
IO 1
GND
2
D34
TPD1E10B06
IO 1
GND
2
C448 0.1uf,16V
USB3VBUS
C450 0.1uf,16V
C449 0.1uf,16V
C451 0.1uf,16V
D38
TPD2EUSB30ADR
D+
1
D-
2GND 3
D29
TPD2EUSB30ADR
D+
1
D-
2GND 3
TX2+
TX1-
TX1+
TX2-
USB_RXM1
14 USB_RXP1
14
USB_DP1
14 USB_DM1
14
USB_TXM1
14 USB_TXP1
14
USB_RXP2
14
USB_DP2
14 USB_DM2
14
USB_TXM2
14 USB_TXP2
14
USB_RXM2
14
D28
TPD2EUSB30ADR
D+
1
D-
2GND 3
D31
TPD2EUSB30ADR
D+ 1
D- 2
GND
3
D33
TPD2EUSB30ADR
D+ 1
D- 2
GND
3
D30
TPD2EUSB30ADR
D+ 1
D- 2
GND
3
P15
GSB311231HR
VBUS0
1
D0+
3D0-
2
RX0+
6RX0-
5
GNDD0 7
TX0+
9TX0-
8SHLD0 19
GND0 4
VBUS1
10
D1-
11
D1+
12
RX1-
14
RX1+
15
TX1+
18 TX1-
17
GND1 13
GNDD1 16
SHLD1 20
SHLD2 21
SHLD3 22
R300
1M,1%
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 77 of 88
4.4 eSATA/SATA
Figure 73 is the block diagram of the SATA section.
Figure 73. eSATA Block Diagram
A switch is used to direct the SATA signals to the onboard eSATA connector or to the
expansion header, where they can be used by add-on boards. If the signal on the
expansion header, P19-4, is left open, the signals go to the eSATA onboard connector. If
the pin is grounded, the switch is activated and the signals are routed to the expansion
headers. If the SATA signals are routed to the expansion headers, the eSATA connector
can still be used as USB port.
The Figure 74 is the detailed design of the eSATA interface. The eSATA interface is a
combination of two separate interfaces, SATA and USB. The eSATA port can be used as
an eSATA or a USB 2.0 port. Power for the eSATA is from the USB power pins, 5V.
The USB signals originate from the USB 3.0 HUB. The SATA interfaces originate from
the AM5728 processor via the switch.
Power is routed to the eSATA connector via the TPS2560 FET switch. It is capable of
providing the 5V at 900mA required by the eSATA connector.
AM57xx
Processor
SATA
SWITCH
eSATA
E
X
P
A
N
S
I
O
N
SATA_SEL
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 78 of 88
Figure 74. eSATA Circuitry
SATA_RXN0
SATA_TXP0
SATA_RXP0
SATA_TXN0
EXP_SATA_RXN
27
EXP_SATA_TXN
27 EXP_SATA_TXP
27
EXP_SATA_RXP
27
VDDA_1V8_PHY
C421
0.1uF/201
L21
FLT_HIFREQ_.47UF
1 3
2
VDD_1V8
R301 0,1%,DNI
R302 0,1%
R303
1K,5%
U31_VDDU31_1V8
U31
PI2DBS212_TQFN
GND1
1
SEL
3
A0+ 4
A0- 5
A1+ 6
A1- 7
VDD1 9
GND2
10
C1-
15 C1+
16 C0-
17 C0+
18
VDD3 13
GND6
25
B1-
21 B1+
22 B0-
23 B0+
24
NC
2NC1
8
VDD2 11
GND3
12 GND4
14 VDD4 19
GND5
20 VDD5 26
VDD6 28
GND7
27
U11-1
AM572x
SATA1_RXN0
AH9
SATA1_RXP0
AG9
SATA1_TXN0
AG10 SATA1_TXP0
AH10
VSSA_SATA
AE10
C415
0.1uf,16V
C416 0.1uf,16V
USB4VBUS
C420 0.1uf,16V
C418 0.1uf,16V
C417 0.1uf,16V
eSATA_T+
eSATA_R-
eSATA_T-
eSATA_R+
USB
SATA
P6
eSATA
VBUS0
1
D-
2
D+
3
GND1
4
GND2
5
A+
6
A-
7
GND3
8
B-
9
B+
10
GND4
11
M1 12
M2 13
S1 14
S2 15
S3 16
S4 17 P20_SHLD
R299 1M,1%
TO THE
EXPANSION
HEADER.
TUSB8040A
U17
USB_DP_DN3 B29
USB_DM_DN3 A31
PWRON3Z_BATEN3 A22
OVERCUR3Z A24
USB_5V
U30_7R298
25.5K,1%
U30
TPS2560DRC
IN1
2
IN2
3
EN1
4
EN2
5
FAULT1
10
FAULT2
6
OUT1 9
OUT2 8
ILIM 7
GND 1
PAD 11
C414
0.1uf,16V
+
C413
100uF,10V
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 79 of 88
4.5 Serial Debug Port
The Figure 75 is the serial debug port on the board. It provides TX, RX, and ground
signals. The SN74LVC2G241 is an isolation buffer to prevent the signals from being fed
back into the processor when the board is powered off.
Figure 75. Debug Serial Port
The TX and RX signals are 3.3V level. In order to connect them to a PC, a USB to serial
converter is required. A common one is the FTDI USB to TTL cable as shown in Figure
76 below. May sure you use the 3.3V version and not the 5V version.
Figure 76. FTDI USB to Serial Adapter
UART3_TXD
15 UART3_RXD
15
R236
10K,1%
B_UART0_TX
B_UART0_RX
U20
SN74LVC2G241
1A 2
2OE
71OE 1
VCC
8
GND 4
2A
52Y 3
1Y
6
C263 0.1uf,16V P10
HEADER 6
1
2
3
4
5
6
VDD_3V3
VDD_3V3
Serial Debug
Cable
Pin 1
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 80 of 88
4.6 JTAG Connector
A JTAG connector is provided for those requiring advanced debug capability. Because
the AM5728 processor has a pair of DSPs, those using the DSP may find this feature very
useful. Figure 77 below shoes the connection diagram.
Figure 77. JTAG Port
4.7 Temperature Sensor
A TMP102A temperture sensor is located nearthe processor. There is also a temperature
sensor inside the processor. This sensor is intended to measure the ambient temperature
near the processor. The sensor is connected to the I2C3 bus on the processor. The alert
pin that indicates the the temperature has exceeded th eset limit is onnected to GPIO7_16.
Figure 78 below shows the temperature sensor circuitry.
Figure 78. Temperature Sensor Circuitry
R61 22,5%
R63 22,5%
R65 22,5%
R60 22,5%
R64 22,5%
U11-14
AM572xEMU1 D24
TDI D23
EMU0 G21
RTCK E18
TCLK E20
TDO F19
TRSTN D20
TMS F18
R67 22,5%
R59
4.7K
R62
4.7K
R66
4.7K
EMU_RSTn
P4
20 Pin JTAG
SRST
15
GND.1 8
GND.2 10
GND.3 12
GND.4 16
GND.5 20
EMU0
13 EMU1 14
EMU2
17 EMU3 18
TCLK
11
EMU4
19
KEY 6
TDIS 4
TDO
7TDI
3TRSTn 2
TMS
1
TVD
5
TCKRTN
9
VDD_3V3
VDD_3V3
VDD_3V3
EMU1
RTCK
TCK
EMU0
TDO
TMS
RTCKR
EMUR
TDITDIR
TDOR
TCLK
TRSTN
EMU_RSTn
EMU1R
C15
0.1uf,16V U4
TMP102AIDRLT
ADD0 4
V+
5
GND
2
ALERT 3
SCL
1
SDA
6
I2C1_SCL
3,7,15,16 I2C1_SDA
3,7,15,16
VDD_3V3
TMP102_ALERT 15
VDD_3V3
R15
4.7K
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 81 of 88
4.8 Real Time Clock
A battery back external Real Time Clock (RTC) MCP79410 is provided to keep the
current clock active while the board is powered down. It can be used in conjunction with
the internal Real Time Clock of the processor which will reset when power is removed
from the board.
In addition to the typical RTC functions, the device has 64 bytes of battery backed RAM
and 1Kb of EEPROM.
The CR1229 non-rechargeable battery supplies 35mAh of backup power which is
sufficient to keep the RTC active for a couple of years. Make sure you do not short the
battery by placing the board on a conductive surface when not in use as you will lose the
time.
Figure 79 below is the RTC circuitry.
Figure 79. Real Time Clock Circuitry
The RTC_ALARM connects to the Wakeup3 signal on the processor.
Communication to the processor uses the I2C3 bus. Registers and settings can be found
in the RTC datasheet.
VDD_3V3
R391
2.2K,1% R392
2.2K,1%
U11-7
AM572x
I2C3_SDA C14
I2CS_SCL D14
R33
4.75K,1%
VDD_3V3
C30 0.1uf,16V
BAT1
CR-1220/FCN
+
1-2
U6
MCP79410,TFDN
X1
1
X2
2
VBAT
3
VSS
4
VCC 8
MFP 7
SCL 6
SDA 5
RTC_X2
RTC_X1 RTC_ALARM
Y1
CFS206-32.768KDZB
1 2
C31
10pF,50V C32
10pF,50V
BU_BATT
VDD_3V3
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 82 of 88
4.9 User LEDs
There are four User LEDS on the board. By setting the corresponding GPIO pin to a 1,
the LED will turn on. Figure 80 shows the User LED circuitry.
Figure 80. User LEDs Circuitry
Table 7 below gives the GPIO pins used for each LED.
Table 7. User LED GPIO Mapping
LED
GPIO PIN
USER0
GPIO7_8
USER1
GPIO7_9
USER2
GPIO7_14
USER3
GPIO7_15
USR0 USR1
USR0
LEDBC
LEDAC
LEDBA
5V0
LEDAA
USR2
USR1
LEDDC
LEDCC
USR3
USR3USR2
LEDCA
LEDDA
R215
4.7K R216
4.7K R217
4.7K R218
4.7K
U11-12
AM572x
GPIO7_15 B22
GPIO7_9 B25
GPIO7_8 F16
GPIO7_14 A26
R222
100K,1%
R221
100K,1%
R220
100K,1%
R219
100K,1%
D4
LTST-C191KFKT D5
LTST-C191KFKT D6
LTST-C191KFKT D7
LTST-C191KFKT
47k
10k
Q3A
DMC56404
16
2
47k
10k
Q3B
DMC56404
43
5
47k
10k
Q4A
DMC56404
16
2
47k
10k
Q4B
DMC56404
43
5
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 83 of 88
4.10 Forgotten Pins
If you look on page 15 of the schematics, you will see a group of pins that are not used.
Figure 81 shows those pins.
Figure 81. Forgotten Pins
These pins are useable from the AM5728 processor. The original design of the X15 was
to support both the AM5728 and the AM5718 processor with the AM5718 being the lead
for the design. In other words the plan was to make it work best of the AM5718. Along
the way things shifted toward the AM5728 as the initial processor. Those pins have
different functions on the AM5718, so they were not brought out to create a compatibility
scenario so as not to lose features when moving between the processors.
For more information on the differences between the two processor go to
http://www.ti.com/lit/an/sprabx8b/sprabx8b.pdf
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 84 of 88
5.0 Expansion Connectors
There are four expansion connectors on the board. The connector used are the Hirose
FX18 series. Figure 82 below is a picture of the connector.
Figure 82. Expansion Connector
When the alpha board was designed, .025 pins and headers were used. The insertion force
and retention force of those connectors made them impossible to use as there were too
may signals. It was impossible to get the boards pulled apart.
On the final version the Hirose connector was used to reduce the insertion and removal
force significantly and to provide for higher speed signal handing required by the PCIe
and SATA signals.
5.1 Expansion Header Pinouts
The following pages cover the functions found on the expansion headers. The actual
pinout is not covered in this document. This information can be found in the Pin Map
spreadsheet that is sortable on all columns, making it easier to search for pins across
various categories such as:
By expansion header
By function (PRU, LCD, etc.)
By name
The Pin Map spreadsheet can be found on the X15 Support Wiki.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 85 of 88
http://elinux.org/BeagleBoard:BeagleBoard-X15
5.1 Creating and Expansion Board
The expansion connectors are located on the bottom side of the board. There are three
possible options for creating your own expansion board.
Create a board that connects to one expansion connector
Create a board that connects to two of the connectors
Create a board that connects to all 4 connectors
Figure 83 below shows the dimensions of the board and the placement of the connectors.
This view is looking through the X15. This would also be the same view used for any
expansion board that were designed. The expansion board mounts on the back side of the
board. DO NOT mount the X15 under the expansion board, unless it is mounted at an
angle to where you get proper airflow, such as when used with an LCD panel.
Figure 83. Expansion Board Measurements
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 86 of 88
The mating connector is the Hirose FX18-60S-0.8SV15. If you need different heights
than this one, they are available as well. Figure 84 is a picture of this connector.
Figure 84. Expansion Mating Expansion Connector
These connectors can be purchased from the following suppliers:
http://www.digikey.com/product-search/en?keywords=FX18-60S-0.8SV15
http://www.mouser.com/ProductDetail/Hirose-Connector/FX18-60S-
08SV15/?qs=sGAEpiMZZMvffgRu4KC1R93sqY37AFrhtQh7fBPpuqI%3d
http://www.newark.com/hirose-hrs/fx18-60s-0-8sv15/connector-rcpt-60pos-2row-0-
8mm/dp/59Y7142?ost=FX18-60S-0.8SV15&categoryId=&categoryName=
http://www.sager.com/fx18-60s-0-8sv15-3614937.html
https://estore.heilind.com/FX18-60S-0.8SV15/HIRFX18-60S-0.8SV15.html
Supply will vary so leave yourself enough time when ordering the parts.
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 87 of 88
Figure 85. X15 Top Side View
REF: SRM_X15
BeagleBoard X15 System
Reference Manual
Rev B1
Page 88 of 88
Figure 86. X15 Bottom Side View