Micron M25P20 2Mb 3V Serial Flash
Embedded Memory
Features
SPI bus compatible serial interface
2Mb Flash memory
75 MHz clock frequency (maximum)
2.3V to 3.6V single supply voltage
Page program (up to 256 bytes) in 0.8ms (TYP)
Erase capability
Sector erase: 512Kb in 0.6s (TYP)
Bulk erase: 3s (TYP)
Hardware write protection: protected area size de-
fined by non-volatile bits BP0 and BP1
Deep power down: 1µA (TYP)
Electronic signature
JEDEC standard 2-byte signature (2012h)
Unique ID code (UID) and 16 bytes read-only,
available upon customer request
READ ELECTRONIC SIGNATURE command, one-
byte signature (11h), for backward compability
More than 20 years data retention
Automotive grade parts available
Packages (RoHS compliant)
SO8N (MN) 150 mils
V-PDFN8 (MP) MLP8 6mm x 5mm
M25P20 Serial Flash Embedded Memory
Features
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Products and specifications discussed herein are subject to change by Micron without notice.
Contents
Important Notes and Warnings ......................................................................................................................... 5
Functional Description ..................................................................................................................................... 6
Signal Descriptions ........................................................................................................................................... 8
SPI Modes ........................................................................................................................................................ 9
Operating Features ......................................................................................................................................... 11
Page Programming ..................................................................................................................................... 11
Sector Erase, Bulk Erase .............................................................................................................................. 11
Polling during a Write, Program, or Erase Cycle ............................................................................................ 11
Active Power, Standby Power, and Deep Power-Down .................................................................................. 11
Status Register ............................................................................................................................................ 12
Data Protection by Protocol ........................................................................................................................ 12
Software Data Protection ............................................................................................................................ 12
Hardware Data Protection .......................................................................................................................... 12
Hold Condition .......................................................................................................................................... 12
Configuration and Memory Map ..................................................................................................................... 14
Memory Configuration and Block Diagram .................................................................................................. 14
Memory Map – 2Mb Density ........................................................................................................................... 15
Command Set Overview ................................................................................................................................. 16
WRITE ENABLE .............................................................................................................................................. 18
WRITE DISABLE ............................................................................................................................................. 19
READ IDENTIFICATION ................................................................................................................................. 20
READ STATUS REGISTER ................................................................................................................................ 21
WIP Bit ...................................................................................................................................................... 22
WEL Bit ...................................................................................................................................................... 22
Block Protect Bits ....................................................................................................................................... 22
SRWD Bit ................................................................................................................................................... 22
WRITE STATUS REGISTER .............................................................................................................................. 23
READ DATA BYTES ......................................................................................................................................... 25
READ DATA BYTES at HIGHER SPEED ............................................................................................................ 26
PAGE PROGRAM ............................................................................................................................................ 27
SECTOR ERASE .............................................................................................................................................. 28
BULK ERASE .................................................................................................................................................. 29
DEEP POWER-DOWN ..................................................................................................................................... 30
RELEASE from Deep Power-Down ................................................................................................................... 31
Power-Up/Down and Supply Line Decoupling ................................................................................................. 32
Power-Up Timing and Write Inhibit Voltage Threshold Specifications ............................................................... 34
Maximum Ratings and Operating Conditions .................................................................................................. 35
Electrical Characteristics ................................................................................................................................ 36
AC Characteristics .......................................................................................................................................... 38
Package Information ...................................................................................................................................... 42
Device Ordering Information .......................................................................................................................... 44
Standard Parts ............................................................................................................................................ 44
Automotive Parts ........................................................................................................................................ 45
Revision History ............................................................................................................................................. 46
Rev. C – 06/18 ............................................................................................................................................. 46
Rev. B – 10/13 ............................................................................................................................................. 46
Rev. A – 02/13 ............................................................................................................................................. 46
M25P20 Serial Flash Embedded Memory
Features
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List of Figures
Figure 1: Logic Diagram ................................................................................................................................... 6
Figure 2: Pin Connections: SO8 and MLP8 ........................................................................................................ 7
Figure 3: SPI Modes Supported ........................................................................................................................ 9
Figure 4: Bus Master and Memory Devices on the SPI Bus ............................................................................... 10
Figure 5: Hold Condition Activation ............................................................................................................... 13
Figure 6: Block Diagram ................................................................................................................................ 14
Figure 7: WRITE ENABLE Command Sequence .............................................................................................. 18
Figure 8: WRITE DISABLE Command Sequence ............................................................................................. 19
Figure 9: READ IDENTIFICATION Command Sequence ................................................................................. 20
Figure 10: READ STATUS REGISTER Command Sequence .............................................................................. 21
Figure 11: Status Register Format ................................................................................................................... 21
Figure 12: WRITE STATUS REGISTER Command Sequence ............................................................................. 23
Figure 13: READ DATA BYTES Command Sequence ........................................................................................ 25
Figure 14: READ DATA BYTES at HIGHER SPEED Command Sequence ........................................................... 26
Figure 15: PAGE PROGRAM Command Sequence ........................................................................................... 27
Figure 16: SECTOR ERASE Command Sequence ............................................................................................. 28
Figure 17: BULK ERASE Command Sequence ................................................................................................. 29
Figure 18: DEEP POWER-DOWN Command Sequence ................................................................................... 30
Figure 19: RELEASE from Deep Power-Down Sequence .................................................................................. 31
Figure 20: Power-Up Timing .......................................................................................................................... 33
Figure 21: AC Measurement I/O Waveform ..................................................................................................... 38
Figure 22: Serial Input Timing ........................................................................................................................ 40
Figure 23: Write Protect Setup and Hold during WRSR when SRWD = 1 Timing ................................................ 40
Figure 24: Hold Timing .................................................................................................................................. 41
Figure 25: Output Timing .............................................................................................................................. 41
Figure 26: SO8N 150 mils Body Width ............................................................................................................ 42
Figure 27: V-PDFN8 6mm x 5mm ................................................................................................................... 43
M25P20 Serial Flash Embedded Memory
Features
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List of Tables
Table 1: Signal Names ...................................................................................................................................... 7
Table 2: Signal Descriptions ............................................................................................................................. 8
Table 3: Protected Area Sizes .......................................................................................................................... 12
Table 4: Sectors 3:0 ........................................................................................................................................ 15
Table 5: Command Set Codes ........................................................................................................................ 17
Table 6: READ IDENTIFICATION Data Out Sequence ..................................................................................... 20
Table 7: Status Register Protection Modes ...................................................................................................... 24
Table 8: Power-Up Timing and VWI Threshold ................................................................................................. 34
Table 9: Absolute Maximum Ratings .............................................................................................................. 35
Table 10: Operating Conditions ...................................................................................................................... 35
Table 11: Data Retention and Endurance ........................................................................................................ 35
Table 12: DC Current Specifications (Device Grade 6) ..................................................................................... 36
Table 13: DC Current Specifications (Device Grade 3) ..................................................................................... 36
Table 14: DC Voltage Specifications ................................................................................................................ 36
Table 15: Instruction Times, Process Technology (Device Grade 6) .................................................................. 37
Table 16: Instruction Times (Device Grade 3)1, 2 .............................................................................................. 37
Table 17: AC Measurement Conditions ........................................................................................................... 38
Table 18: Capacitance .................................................................................................................................... 38
Table 19: AC Specifications (75 MHz, Device Grade 6, VCCmin = 2.7V) ............................................................. 39
Table 20: Part Number Information Scheme ................................................................................................... 44
Table 21: Part Number Information Scheme ................................................................................................... 45
M25P20 Serial Flash Embedded Memory
Features
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Important Notes and Warnings
Micron Technology, Inc. ("Micron") reserves the right to make changes to information published in this document,
including without limitation specifications and product descriptions. This document supersedes and replaces all
information supplied prior to the publication hereof. You may not rely on any information set forth in this docu-
ment if you obtain the product described herein from any unauthorized distributor or other source not authorized
by Micron.
Automotive Applications. Products are not designed or intended for use in automotive applications unless specifi-
cally designated by Micron as automotive-grade by their respective data sheets. Distributor and customer/distrib-
utor shall assume the sole risk and liability for and shall indemnify and hold Micron harmless against all claims,
costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of
product liability, personal injury, death, or property damage resulting directly or indirectly from any use of non-
automotive-grade products in automotive applications. Customer/distributor shall ensure that the terms and con-
ditions of sale between customer/distributor and any customer of distributor/customer (1) state that Micron
products are not designed or intended for use in automotive applications unless specifically designated by Micron
as automotive-grade by their respective data sheets and (2) require such customer of distributor/customer to in-
demnify and hold Micron harmless against all claims, costs, damages, and expenses and reasonable attorneys'
fees arising out of, directly or indirectly, any claim of product liability, personal injury, death, or property damage
resulting from any use of non-automotive-grade products in automotive applications.
Critical Applications. Products are not authorized for use in applications in which failure of the Micron compo-
nent could result, directly or indirectly in death, personal injury, or severe property or environmental damage
("Critical Applications"). Customer must protect against death, personal injury, and severe property and environ-
mental damage by incorporating safety design measures into customer's applications to ensure that failure of the
Micron component will not result in such harms. Should customer or distributor purchase, use, or sell any Micron
component for any critical application, customer and distributor shall indemnify and hold harmless Micron and
its subsidiaries, subcontractors, and affiliates and the directors, officers, and employees of each against all claims,
costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of
product liability, personal injury, or death arising in any way out of such critical application, whether or not Mi-
cron or its subsidiaries, subcontractors, or affiliates were negligent in the design, manufacture, or warning of the
Micron product.
Customer Responsibility. Customers are responsible for the design, manufacture, and operation of their systems,
applications, and products using Micron products. ALL SEMICONDUCTOR PRODUCTS HAVE INHERENT FAIL-
URE RATES AND LIMITED USEFUL LIVES. IT IS THE CUSTOMER'S SOLE RESPONSIBILITY TO DETERMINE
WHETHER THE MICRON PRODUCT IS SUITABLE AND FIT FOR THE CUSTOMER'S SYSTEM, APPLICATION, OR
PRODUCT. Customers must ensure that adequate design, manufacturing, and operating safeguards are included
in customer's applications and products to eliminate the risk that personal injury, death, or severe property or en-
vironmental damages will result from failure of any semiconductor component.
Limited Warranty. In no event shall Micron be liable for any indirect, incidental, punitive, special or consequential
damages (including without limitation lost profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such damages are based on tort, warranty,
breach of contract or other legal theory, unless explicitly stated in a written agreement executed by Micron's duly
authorized representative.
M25P20 Serial Flash Embedded Memory
Important Notes and Warnings
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Functional Description
The M25P20 is a 2Mb (256Kb x 8) serial Flash memory device with advanced write pro-
tection mechanisms accessed by a high speed SPI-compatible bus. The device supports
high-performance commands for clock frequency up to 75MHz.
Note: 75 MHz operation is available only on the VCC range 2.7V–3.6V.
The memory can be programmed 1 to 256 bytes at a time, using the PAGE PROGRAM
command.
The memory is organized as 4 sectors, each containing 256 pages. Each page is 256
bytes wide. Thus, the whole memory can be viewed as consisting of 1024 pages, or
262,144 bytes.
The whole memory can be erased using the BULK ERASE command, or a sector at a
time, using the SECTOR ERASE command.
In order to meet environmental requirements, these devices RoHS-compliant.
Figure 1: Logic Diagram
S#
VCC
HOLD#
VSS
DQ1
C
DQ0
W#
M25P20 Serial Flash Embedded Memory
Functional Description
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Figure 2: Pin Connections: SO8 and MLP8
1
2
3
4
VCC
HOLD#
5
6
7
8
DQ1
VSS
S#
DQ0
C W#
Note: 1. There is an exposed central pad on the underside of the MLP8 package that is pulled in-
ternally to VSS, and must not be connected to any other voltage or signal line on the
PCB. The Package Mechanical section provides information on package dimensions and
how to identify pin 1.
Table 1: Signal Names
Signal Name Function Direction
C Serial clock Input
DQ0 Serial data input I/O
DQ1 Serial data output I/O
S# Chip select Input
W# Write protect Input
HOLD# Hold Input
VCC Supply voltage
VSS Ground
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Functional Description
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Signal Descriptions
Table 2: Signal Descriptions
Signal Type Description
DQ1 Output Serial data: The DQ1 output signal is used to transfer data serially out of the device.
Data is shifted out on the falling edge of the serial clock (C).
DQ0 Input Serial data: The DQ0 input signal is used to transfer data serially into the device. It
receives commands, addresses, and the data to be programmed. Values are latched on
the rising edge of the serial clock (C).
C Input Clock: The C input signal provides the timing of the serial interface. Commands, ad-
dresses, or data present at serial data input (DQ0) is latched on the rising edge of the
serial clock (C). Data on DQ1 changes after the falling edge of C.
S# Input Chip select: When the S# input signal is HIGH, the device is deselected and DQ1 is at
high impedance. Unless an internal PROGRAM, ERASE, or WRITE STATUS REGISTER cy-
cle is in progress, the device will be in the standby power mode (not the deep power-
down mode). Driving S# LOW enables the device, placing it in the active power mode.
After power-up, a falling edge on S# is required prior to the start of any command.
HOLD# Input Hold: The HOLD# signal is used to pause any serial communications with the device
without deselecting the device. During the hold condition, DQ1 is High-Z. DQ0 and C
are "Don’t Care." To start the hold condition, the device must be selected, with S#
driven LOW.
W# Input Write protect: The W# input signal is used to freeze the size of the area of memory
that is protected against WRITE, PROGRAM, and ERASE commands as specified by the
values in the block protect bits in the status register.
VCC Power Device core power supply: Source voltage.
VSS Ground Ground: Reference for the VCC supply voltage.
DNU Do not use.
M25P20 Serial Flash Embedded Memory
Signal Descriptions
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SPI Modes
These devices can be driven by a microcontroller with its serial peripheral interface
(SPI) running in either of the following two SPI modes:
CPOL = 0, CPHA = 0
CPOL = 1, CPHA = 1
For these two modes, input data is latched in on the rising edge of serial clock (C), and
output data is available from the falling edge of C.
The difference between the two modes is the clock polarity when the bus master is in
standby mode and not transferring data:
C remains at 0 for (CPOL = 0, CPHA = 0)
C remains at 1 for (CPOL = 1, CPHA = 1)
Figure 3: SPI Modes Supported
C
MSB
CPHA
DQ0
0
1
CPOL
0
1
DQ1
C
MSB
Because only one device is selected at a time, only one device drives the serial data out-
put (DQ1) line at a time, while the other devices are High-Z. An example of three devi-
ces connected to an MCU on an SPI bus is shown here.
M25P20 Serial Flash Embedded Memory
SPI Modes
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Figure 4: Bus Master and Memory Devices on the SPI Bus
SPI Bus Master
SPI memory
device
SDO
SDI
SCK
C
DQ1 DQ0
S#
SPI memory
device
C
DQ1 DQ0
S#
SPI memory
device
C
DQ1 DQ0
S#
CS3 CS2 CS1
SPI interface with
(CPOL, CPHA) =
(0, 0) or (1, 1)
W# HOLD# HOLD# W# HOLD#
R R R
VCC
VCC VCC VCC
VSS
VSS VSS VSS
R
W#
Notes: 1. WRITE PROTECT (W#) and HOLD# should be driven HIGH or LOW as appropriate.
2. Resistors (R) ensure that the memory device is not selected if the bus master leaves the
S# line High-Z.
3. The bus master may enter a state where all I/O are High-Z at the same time; for exam-
ple, when the bus master is reset. Therefore, C must be connected to an external pull-
down resistor so that when all I/O are High-Z, S# is pulled HIGH while C is pulled LOW.
This ensures that S# and C do not go HIGH at the same time and that the tSHCH require-
ment is met.
4. The typical value of R is 100kΩ, assuming that the time constant R × Cp (Cp = parasitic
capacitance of the bus line) is shorter than the time during which the bus master leaves
the SPI bus High-Z.
5. Example: Given that Cp = 50pF (R × Cp = 5μs), the application must ensure that the bus
master never leaves the SPI bus High-Z for a time period shorter than 5μs.
M25P20 Serial Flash Embedded Memory
SPI Modes
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Operating Features
Page Programming
To program one data byte, two commands are required: WRITE ENABLE, which is one
byte, and a PAGE PROGRAM sequence, which is four bytes plus data. This is followed by
the internal PROGRAM cycle of duration tPP. To spread this overhead, the PAGE PRO-
GRAM command allows up to 256 bytes to be programmed at a time (changing bits
from 1 to 0), provided they lie in consecutive addresses on the same page of memory. To
optimize timings, it is recommended to use the PAGE PROGRAM command to program
all consecutive targeted bytes in a single sequence than to use several PAGE PROGRAM
sequences with each containing only a few bytes.
Sector Erase, Bulk Erase
The PAGE PROGRAM command allows bits to be reset from 1 to 0. Before this can be
applied, the bytes of memory need to have been erased to all 1s (FFh). This can be ach-
ieved a sector at a time using the SECTOR ERASE command, or throughout the entire
memory using the BULK ERASE command. This starts an internal ERASE cycle of dura-
tion tSSE, tSE or tBE. The ERASE command must be preceded by a WRITE ENABLE com-
mand.
Polling during a Write, Program, or Erase Cycle
An improvement in the time to complete the following commands can be achieved by
not waiting for the worst case delay (tW, tPP, tSE, or tBE).
WRITE STATUS REGISTER
PROGRAM
ERASE (SECTOR ERASE, BULK ERASE)
The write in progress (WIP) bit is provided in the status register so that the application
program can monitor this bit in the status register, polling it to establish when the pre-
vious WRITE cycle, PROGRAM cycle, or ERASE cycle is complete.
Active Power, Standby Power, and Deep Power-Down
When chip select (S#) is LOW, the device is selected, and in the ACTIVE POWER mode.
When S# is HIGH, the device is deselected, but could remain in the ACTIVE POWER
mode until all internal cycles have completed (PROGRAM, ERASE, WRITE STATUS
REGISTER). The device then goes in to the STANDBY POWER mode. The device con-
sumption drops to ICC1.
The DEEP POWER-DOWN mode is entered when the DEEP POWER-DOWN command
is executed. The device consumption drops further to ICC2. The device remains in this
mode until the RELEASE FROM DEEP POWER-DOWN command is executed. While in
the DEEP POWER-DOWN mode, the device ignores all WRITE, PROGRAM, and ERASE
commands. This provides an extra software protection mechanism when the device is
not in active use, by protecting the device from inadvertent WRITE, PROGRAM, or
ERASE operations. For further information, see the DEEP POWER DOWN command.
M25P20 Serial Flash Embedded Memory
Operating Features
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Status Register
The status register contains a number of status and control bits that can be read or set
(as appropriate) by specific commands. For a detailed description of the status register
bits, see the READ STATUS REGISTER command.
Data Protection by Protocol
Non-volatile memory is used in environments that can include excessive noise. The fol-
lowing capabilities help protect data in these noisy environments.
Power on reset and an internal timer (tPUW) can provide protection against inadvertent
changes while the power supply is outside the operating specification.
PROGRAM, ERASE, and WRITE STATUS REGISTER commands are checked before they
are accepted for execution to ensure they consist of a number of clock pulses that is a
multiple of eight.
All commands that modify data must be preceded by a WRITE ENABLE command to set
the write enable latch (WEL) bit.
In addition to the low power consumption feature, the DEEP POWER-DOWN mode of-
fers extra software protection since all WRITE, PROGRAM, and ERASE commands are
ignored when the device is in this mode.
Software Data Protection
Memory can be configured as read-only using the block protect bits (BP1, BP0) as
shown in the Protected Area Sizes table.
Hardware Data Protection
Hardware data protection is implemented using the write protect signal applied on the
W# pin. This freezes the status register in a read-only mode. In this mode, the block pro-
tect (BP) bits and the status register write disable bit (SRWD) are protected.
Table 3: Protected Area Sizes
Status Register Content Memory Content
BP Bit 1 BP Bit 0 Protected Area Unprotected Area
0 0 none All sectors (sectors 0 to 3)
0 1 Upper 4th (sector 3) Lower 3/4ths (sectors 0 to 2)
1 0 Upper half (sectors 2 and 3) Lower half (sectors 0 and 1)
1 1 All sectors (sectors 0 to 3) none
Note: 1. 0 0 = unprotected area (sectors): The device is ready to accept a BULK ERASE command
only if all block protect bits (BP1, BP0) are 0.
Hold Condition
The HOLD# signal is used to pause any serial communications with the device without
resetting the clocking sequence. However, taking this signal LOW does not terminate
any WRITE STATUS REGISTER, PROGRAM, or ERASE cycle that is currently in progress.
M25P20 Serial Flash Embedded Memory
Operating Features
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To enter the hold condition, the device must be selected, with S# LOW. The hold condi-
tion starts on the falling edge of the HOLD# signal, if this coincides with serial clock (C)
being LOW. The hold condition ends on the rising edge of the HOLD# signal, if this co-
incides with C being LOW. If the falling edge does not coincide with C being LOW, the
hold condition starts after C next goes LOW. Similarly, if the rising edge does not coin-
cide with C being LOW, the hold condition ends after C next goes LOW.
During the hold condition, DQ1 is HIGH impedance while DQ0 and C are Don’t Care.
Typically, the device remains selected with S# driven LOW for the duration of the hold
condition. This ensures that the state of the internal logic remains unchanged from the
moment of entering the hold condition. If S# goes HIGH while the device is in the hold
condition, the internal logic of the device is reset. To restart communication with the
device, it is necessary to drive HOLD# HIGH, and then to drive S# LOW. This prevents
the device from going back to the hold condition.
Figure 5: Hold Condition Activation
HOLD#
C
HOLD condition (standard use) HOLD condition (nonstandard use)
M25P20 Serial Flash Embedded Memory
Operating Features
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Configuration and Memory Map
Memory Configuration and Block Diagram
Each page of memory can be individually programmed; bits are programmed from 1 to
0. The device is sector or bulk-erasable, but not page-erasable; bits are erased from 0 to
1. The memory is configured as follows:
262,144 bytes (8 bits each)
4 sectors (256 pages each)
1024 pages (256 bytes each)
Figure 6: Block Diagram
HOLD#
S#
W# Control Logic
High Voltage
Generator
I/O Shift Register
Address Register
and Counter
256 Byte
Data Buffer
256 bytes (page size)
X Decoder
Y Decoder
C
DQ1
DQ0
Status
Register
00000h
10000h
20000h
30000h
3FFFFh
000FFh
Size of the
read-only
memory
area
M25P20 Serial Flash Embedded Memory
Configuration and Memory Map
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Memory Map – 2Mb Density
Table 4: Sectors 3:0
Sector
Address Range
Start End
3 0003 0000 0003 FFFF
2 0002 0000 0002 FFFF
1 0001 0000 0001 FFFF
0 0000 0000 0000 FFFF
M25P20 Serial Flash Embedded Memory
Memory Map – 2Mb Density
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Command Set Overview
All commands, addresses, and data are shifted in and out of the device, most significant
bit first.
Serial data inputs DQ0 and DQ1 are sampled on the first rising edge of serial clock (C)
after chip select (S#) is driven LOW. Then, the one-byte command code must be shifted
in to the device, most significant bit first, on DQ0 and DQ1, each bit being latched on
the rising edges of C.
Every command sequence starts with a one-byte command code. Depending on the
command, this command code might be followed by address or data bytes, by address
and data bytes, or by neither address or data bytes. For the following commands, the
shifted-in command sequence is followed by a data-out sequence. S# can be driven
HIGH after any bit of the data-out sequence is being shifted out.
READ DATA BYTES (READ)
READ DATA BYTES at HIGHER SPEED
READ STATUS REGISTER
READ IDENTIFICATION
RELEASE from DEEP POWER-DOWN
For the following commands, S# must be driven HIGH exactly at a byte boundary. That
is, after an exact multiple of eight clock pulses following S# being driven LOW, S# must
be driven HIGH. Otherwise, the command is rejected and not executed.
PAGE PROGRAM
SECTOR ERASE
BULK ERASE
WRITE STATUS REGISTER
WRITE ENABLE
WRITE DISABLE
DEEP POWER-DOWN
All attempts to access the memory array are ignored during a WRITE STATUS REGISTER
command cycle, a PROGRAM command cycle, or an ERASE command cycle. In addi-
tion, the internal cycle for each of these commands continues unaffected.
M25P20 Serial Flash Embedded Memory
Command Set Overview
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Table 5: Command Set Codes
Command Name
One-Byte
Command Code
Bytes
Address Dummy Data
WRITE ENABLE 0000
0110
06h 0 0 0
WRITE DISABLE 0000
0100
04h 0 0 0
READ IDENTIFICATION 1001
1111
9Fh 0 0 1 to 20
1001
1110
9Eh 1 to 20
READ STATUS REGISTER 0000
0101
05h 0 0 1 to
WRITE STATUS REGISTER 0000
0001
01h 0 0 1
READ DATA BYTES 0000
0011
03h 3 0 1 to
READ DATA BYTES at HIGHER SPEED 0000
1011
0Bh 3 1 1 to
PAGE PROGRAM 0000
0010
02h 3 0 1 to 256
SECTOR ERASE 1101
1000
D8h 3 0 0
BULK ERASE 1100
0111
C7h 0 0 0
DEEP POWER-DOWN 1011
1001
B9h 0 0 0
RELEASE from DEEP POWER-DOWN 1010
1011
ABh 0 0 0
RELEASE from DEEP POWER-DOWN and
READ ELECTRONIC SIGNATURE
1010
1011
ABh 0 3 1 to
Note: 1. The Read Identification (RDID) instruction is available only in products with Process Tech-
nology code X and 4.
M25P20 Serial Flash Embedded Memory
Command Set Overview
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© 2012 Micron Technology, Inc. All rights reserved.
WRITE ENABLE
The WRITE ENABLE command sets the write enable latch (WEL) bit.
The WEL bit must be set before execution of every PROGRAM, ERASE, and WRITE com-
mand.
The WRITE ENABLE command is entered by driving chip select (S#) LOW, sending the
command code, and then driving S# HIGH.
Figure 7: WRITE ENABLE Command Sequence
Don’t Care
DQ[0]
01 2 4 53 76
C
High-Z
DQ1
MSB
LSB
0 0 0 0 0 011
Command bits
S#
M25P20 Serial Flash Embedded Memory
WRITE ENABLE
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WRITE DISABLE
The WRITE DISABLE command resets the write enable latch (WEL) bit.
The WRITE DISABLE command is entered by driving chip select (S#) LOW, sending the
command code, and then driving S# HIGH.
The WEL bit is reset under the following conditions:
Power-up
Completion of any ERASE operation
Completion of any PROGRAM operation
Completion of any WRITE STATUS REGISTER operation
Completion of WRITE DISABLE operation
Figure 8: WRITE DISABLE Command Sequence
Don’t Care
DQ[0]
01 2 4 53 76
C
High-Z
DQ1
MSB
LSB
0 0 0 0 0 001
Command bits
S#
M25P20 Serial Flash Embedded Memory
WRITE DISABLE
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READ IDENTIFICATION
The READ IDENTIFICATION command reads the following device identification data:
Manufacturer identification (1 byte): This is assigned by JEDEC.
Device identification (2 bytes): This is assigned by device manufacturer; the first byte
indicates memory type and the second byte indicates device memory capacity.
A Unique ID code (UID) (17 bytes,16 available upon customer request): The first byte
contains length of data to follow; the remaining 16 bytes contain optional Customized
Factory Data (CFD) content.
Table 6: READ IDENTIFICATION Data Out Sequence
Manufacturer
Identification
Device Identification UID
Memory Type Memory Capacity CFD Length CFD Content
20h 20h 12h 10h 16 bytes
A READ IDENTIFICATION command is not decoded while an ERASE or PROGRAM cy-
cle is in progress and has no effect on a cycle in progress. The READ IDENTIFICATION
command must not be issued while the device is in DEEP POWER-DOWN mode.
The device is first selected by driving S# LOW. Then the 8-bit command code is shifted
in and content is shifted out on DQ1 as follows: the 24-bit device identification that is
stored in the memory, the 8-bit CFD length, followed by 16 bytes of CFD content. Each
bit is shifted out during the falling edge of serial clock (C).
The READ IDENTIFICATION command is terminated by driving S# HIGH at any time
during data output. When S# is driven HIGH, the device is put in the STANDBY POWER
mode and waits to be selected so that it can receive, decode, and execute commands.
Figure 9: READ IDENTIFICATION Command Sequence
UIDDevice
identification
Manufacturer
identification
High-Z
DQ1
MSB MSB
DOUT DOUT DOUT DOUT
LSB
LSB
7 8 15 16 32
31
0
C
MSB
DQ0
LSB
Command
MSB
DOUT DOUT
LSB
Don’t Care
M25P20 Serial Flash Embedded Memory
READ IDENTIFICATION
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READ STATUS REGISTER
The READ STATUS REGISTER command allows the status register to be read. The status
register may be read at any time, even while a PROGRAM, ERASE, or WRITE STATUS
REGISTER cycle is in progress. When one of these cycles is in progress, it is recommen-
ded to check the write in progress (WIP) bit before sending a new command to the de-
vice. It is also possible to read the status register continuously.
Figure 10: READ STATUS REGISTER Command Sequence
Figure 11: Status Register Format
b7
SRWD 00 0 BP1 BP0 WEL WIP
b0
status register write protect
block protect bits
write enable latch bit
write in progress bit
M25P20 Serial Flash Embedded Memory
READ STATUS REGISTER
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WIP Bit
The write in progress (WIP) bit indicates whether the memory is busy with a WRITE
STATUS REGISTER cycle, a PROGRAM cycle, or an ERASE cycle. When the WIP bit is set
to 1, a cycle is in progress; when the WIP bit is set to 0, a cycle is not in progress.
WEL Bit
The write enable latch (WEL) bit indicates the status of the internal write enable latch.
When the WEL bit is set to 1, the internal write enable latch is set; when the WEL bit is
set to 0, the internal write enable latch is reset and no WRITE STATUS REGISTER, PRO-
GRAM, or ERASE command is accepted.
Block Protect Bits
The block protect bits are non-volatile. They define the size of the area to be software
protected against PROGRAM and ERASE commands. The block protect bits are written
with the WRITE STATUS REGISTER command.
When one or more of the block protect bits is set to 1, the relevant memory area, as de-
fined in the Protected Area Sizes table, becomes protected against PAGE PROGRAM and
SECTOR ERASE commands. The block protect bits can be written provided that the
HARDWARE PROTECTED mode has not been set. The BULK ERASE command is execu-
ted only if all block protect bits are 0.
SRWD Bit
The status register write disable (SRWD) bit is operated in conjunction with the write
protect (W#) signal. When the SRWD bit is set to 1 and W# is driven LOW, the device is
put in the hardware protected mode. In the hardware protected mode, the non-volatile
bits of the status register (SRWD, and the block protect bits) become read-only bits and
the WRITE STATUS REGISTER command is no longer accepted for execution.
M25P20 Serial Flash Embedded Memory
READ STATUS REGISTER
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WRITE STATUS REGISTER
The WRITE STATUS REGISTER command allows new values to be written to the status
register. Before the WRITE STATUS REGISTER command can be accepted, a WRITE EN-
ABLE command must have been executed previously. After the WRITE ENABLE com-
mand has been decoded and executed, the device sets the write enable latch (WEL) bit.
The WRITE STATUS REGISTER command is entered by driving chip select (S#) LOW,
followed by the command code and the data byte on serial data input (DQ0). The
WRITE STATUS REGISTER command has no effect on b6, b5, b4, b1, and b0 of the sta-
tus register. The status register b6, b5, and b4 are always read as ‘0’. S# must be driven
HIGH after the eighth bit of the data byte has been latched in. If not, the WRITE STATUS
REGISTER command is not executed.
Figure 12: WRITE STATUS REGISTER Command Sequence
7 8 9 10 11 12 13 14 15
0
C
MSB
DQ0
LSB
Command
MSB
LSB
DIN DIN DIN DIN DIN
DIN DIN DIN DIN
As soon as S# is driven HIGH, the self-timed WRITE STATUS REGISTER cycle is initi-
ated; its duration is tW. While the WRITE STATUS REGISTER cycle is in progress, the sta-
tus register may still be read to check the value of the write in progress (WIP) bit. The
WIP bit is 1 during the self-timed WRITE STATUS REGISTER cycle, and is 0 when the
cycle is completed. Also, when the cycle is completed, the WEL bit is reset.
The WRITE STATUS REGISTER command allows the user to change the values of the
block protect bits (BP1, BP0). Setting these bit values defines the size of the area that is
to be treated as read-only, as defined in the Protected Area Sizes table.
The WRITE STATUS REGISTER command also allows the user to set and reset the status
register write disable (SRWD) bit in accordance with the write protect (W#) signal. The
SRWD bit and the W# signal allow the device to be put in the HARDWARE PROTECTED
(HPM) mode. The WRITE STATUS REGISTER command is not executed once the HPM
is entered. The options for enabling the status register protection modes are summar-
ized here.
M25P20 Serial Flash Embedded Memory
WRITE STATUS REGISTER
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Table 7: Status Register Protection Modes
W#
Signal
SRWD
Bit
Protection
Mode (PM)
Status Register
Write Protection
Memory Content
Notes
Protected
Area
Unprotected
Area
1 0 SOFTWARE
PROTECTED mode
(SPM)
Software protection Commands not
accepted
Commands
accepted
1, 2, 3
0 0
1 1
0 1 HARDWARE
PROTECTED mode
(HPM)
Hardware protection Commands not
accepted
Commands
accepted
3, 4, 5,
Notes: 1. Software protection: status register is writable (SRWD, BP1, and BP0 bit values can be
changed) if the WRITE ENABLE command has set the WEL bit.
2. PAGE PROGRAM, SECTOR ERASE, AND BULK ERASE commands are not accepted.
3. PAGE PROGRAM and SECTOR ERASE commands can be accepted.
4. Hardware protection: status register is not writable (SRWD, BP1, and BP0 bit values can-
not be changed).
5. PAGE PROGRAM, SECTOR ERASE, AND BULK ERASE commands are not accepted.
When the SRWD bit of the status register is 0 (its initial delivery state), it is possible to
write to the status register provided that the WEL bit has been set previously by a WRITE
ENABLE command, regardless of whether the W# signal is driven HIGH or LOW. When
the status register SRWD bit is set to 1, two cases need to be considered depending on
the state of the W# signal:
If the W# signal is driven HIGH, it is possible to write to the status register provided
that the WEL bit has been set previously by a WRITE ENABLE command.
If the W# signal is driven LOW, it is not possible to write to the status register even if
the WEL bit has been set previously by a WRITE ENABLE command. Therefore, at-
tempts to write to the status register are rejected, and are not accepted for execution.
The result is that all the data bytes in the memory area that have been put in SPM by
the status register block protect bits (BP1, BP0) are also hardware protected against
data modification.
Regardless of the order of the two events, the HPM can be entered in either of the fol-
lowing ways:
Setting the status register SRWD bit after driving the W# signal LOW
Driving the W# signal LOW after setting the status register SRWD bit.
The only way to exit the HPM is to pull the W# signal HIGH. If the W# signal is perma-
nently tied HIGH, the HPM can never be activated. In this case, only the SPM is availa-
ble, using the status register block protect bits (BP1, BP0).
M25P20 Serial Flash Embedded Memory
WRITE STATUS REGISTER
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READ DATA BYTES
The device is first selected by driving chip select (S#) LOW. The command code for
READ DATA BYTES is followed by a 3-byte address (A23-A0), each bit being latched-in
during the rising edge of serial clock (C). Then the memory contents at that address is
shifted out on serial data output (DQ1), each bit being shifted out at a maximum fre-
quency fR during the falling edge of C.
The first byte addressed can be at any location. The address is automatically incremen-
ted to the next higher address after each byte of data is shifted out. Therefore, the entire
memory can be read with a single READ DATA BYTES command. When the highest ad-
dress is reached, the address counter rolls over to 000000h, allowing the read sequence
to be continued indefinitely.
The READ DATA BYTES command is terminated by driving S# HIGH. S# can be driven
HIGH at any time during data output. Any READ DATA BYTES command issued while
an ERASE, PROGRAM, or WRITE cycle is in progress is rejected without any effect on
the cycle that is in progress.
Figure 13: READ DATA BYTES Command Sequence
Don’t Care
MSB
DQ[0]
LSB
Command
A[MAX]
A[MIN]
7 8 Cx
0
C
High-Z
DQ1
MSB
DOUT DOUT DOUT DOUT DOUT
LSB
DOUT DOUT DOUT DOUT
Note: 1. Cx = 7 + (A[MAX] + 1).
M25P20 Serial Flash Embedded Memory
READ DATA BYTES
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READ DATA BYTES at HIGHER SPEED
The device is first selected by driving chip select (S#) LOW. The command code for the
READ DATA BYTES at HIGHER SPEED command is followed by a 3-byte address (A23-
A0) and a dummy byte, each bit being latched-in during the rising edge of serial clock
(C). Then the memory contents at that address are shifted out on serial data output
(DQ1) at a maximum frequency fC, during the falling edge of C.
The first byte addressed can be at any location. The address is automatically incremen-
ted to the next higher address after each byte of data is shifted out. Therefore, the entire
memory can be read with a single READ DATA BYTES at HIGHER SPEED command.
When the highest address is reached, the address counter rolls over to 000000h, allow-
ing the read sequence to be continued indefinitely.
The READ DATA BYTES at HIGHER SPEED command is terminated by driving S# HIGH.
S# can be driven HIGH at any time during data output. Any READ DATA BYTES at
HIGHER SPEED command issued while an ERASE, PROGRAM, or WRITE cycle is in
progress is rejected without any effect on the cycle that is in progress.
Figure 14: READ DATA BYTES at HIGHER SPEED Command Sequence
7 8 Cx
0
C
MSB
DQ0
LSB
Command
A[MAX]
A[MIN]
MSB
DOUT DOUT DOUT DOUT DOUT
LSB
DOUT DOUT DOUT DOUT
Dummy cycles
DQ1 High-Z
Don’t Care
Note: 1. Cx = 7 + (A[MAX] + 1).
M25P20 Serial Flash Embedded Memory
READ DATA BYTES at HIGHER SPEED
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PAGE PROGRAM
The PAGE PROGRAM command allows bytes in the memory to be programmed, which
means the bits are changed from 1 to 0. Before a PAGE PROGRAM command can be ac-
cepted a WRITE ENABLE command must be executed. After the WRITE ENABLE com-
mand has been decoded, the device sets the write enable latch (WEL) bit.
The PAGE PROGRAM command is entered by driving chip select (S#) LOW, followed by
the command code, three address bytes, and at least one data byte on serial data input
(DQ0).
If the eight least significant address bits (A7-A0) are not all zero, all transmitted data that
goes beyond the end of the current page are programmed from the start address of the
same page; that is, from the address whose eight least significant bits (A7-A0) are all
zero. S# must be driven LOW for the entire duration of the sequence.
If more than 256 bytes are sent to the device, previously latched data are discarded and
the last 256 data bytes are guaranteed to be programmed correctly within the same
page. If less than 256 data bytes are sent to device, they are correctly programmed at the
requested addresses without any effects on the other bytes of the same page.
For optimized timings, it is recommended to use the PAGE PROGRAM command to
program all consecutive targeted bytes in a single sequence rather than to use several
PAGE PROGRAM sequences, each containing only a few bytes.
S# must be driven HIGH after the eighth bit of the last data byte has been latched in.
Otherwise the PAGE PROGRAM command is not executed.
As soon as S# is driven HIGH, the self-timed PAGE PROGRAM cycle is initiated; the cy-
cles's duration is tPP. While the PAGE PROGRAM cycle is in progress, the status register
may be read to check the value of the write in progress (WIP) bit. The WIP bit is 1 during
the self-timed PAGE PROGRAM cycle, and 0 when the cycle is completed. At some un-
specified time before the cycle is completed, the write enable latch (WEL) bit is reset.
A PAGE PROGRAM command is not executed if it applies to a page protected by the
block protect bits BP1, and BP0.
Figure 15: PAGE PROGRAM Command Sequence
7 8 Cx
0
C
MSB
DQ[0]
LSB
Command
A[MAX]
A[MIN]
MSB
DIN DIN DIN DIN DIN
LSB
DIN DIN DIN DIN
Note: 1. Cx = 7 + (A[MAX] + 1).
M25P20 Serial Flash Embedded Memory
PAGE PROGRAM
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SECTOR ERASE
The SECTOR ERASE command sets to 1 (FFh) all bits inside the chosen sector. Before
the SECTOR ERASE command can be accepted, a WRITE ENABLE command must have
been executed previously. After the WRITE ENABLE command has been decoded, the
device sets the write enable latch (WEL) bit.
The SECTOR ERASE command is entered by driving chip select (S#) LOW, followed by
the command code, and three address bytes on serial data input (DQ0). Any address in-
side the sector is a valid address for the SECTOR ERASE command. S# must be driven
LOW for the entire duration of the sequence.
S# must be driven HIGH after the eighth bit of the last address byte has been latched in.
Otherwise the SECTOR ERASE command is not executed. As soon as S# is driven HIGH,
the self-timed SECTOR ERASE cycle is initiated; the cycle's duration is tSE. While the
SECTOR ERASE cycle is in progress, the status register may be read to check the value of
the write in progress (WIP) bit. The WIP bit is 1 during the self-timed SECTOR ERASE
cycle, and is 0 when the cycle is completed. At some unspecified time before the cycle is
completed, the WEL bit is reset.
A SECTOR ERASE command is not executed if it applies to a sector that is hardware or
software protected.
Figure 16: SECTOR ERASE Command Sequence
7 8 Cx
0
C
MSB
DQ0
LSB
Command
A[MAX]
A[MIN]
Note: 1. Cx = 7 + (A[MAX] + 1).
M25P20 Serial Flash Embedded Memory
SECTOR ERASE
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BULK ERASE
The BULK ERASE command sets all bits to 1 (FFh). Before the BULK ERASE command
can be accepted, a WRITE ENABLE command must have been executed previously. Af-
ter the WRITE ENABLE command has been decoded, the device sets the write enable
latch (WEL) bit.
The BULK ERASE command is entered by driving chip select (S#) LOW, followed by the
command code on serial data input (DQ0). S# must be driven LOW for the entire dura-
tion of the sequence.
S# must be driven HIGH after the eighth bit of the command code has been latched in.
Otherwise the BULK ERASE command is not executed. As soon as S# is driven HIGH,
the self-timed BULK ERASE cycle is initiated; the cycle's duration is tBE. While the BULK
ERASE cycle is in progress, the status register may be read to check the value of the write
In progress (WIP) bit. The WIP bit is 1 during the self-timed BULK ERASE cycle, and is 0
when the cycle is completed. At some unspecified time before the cycle is completed,
the WEL bit is reset.
The BULK ERASE command is executed only if all block protect (BP1, BP0) bits are 0.
The BULK ERASE command is ignored if one or more sectors are protected.
Figure 17: BULK ERASE Command Sequence
7
0
C
MSB
DQ0
LSB
Command
M25P20 Serial Flash Embedded Memory
BULK ERASE
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DEEP POWER-DOWN
Executing the DEEP POWER-DOWN command is the only way to put the device in the
lowest power consumption mode, the DEEP POWER-DOWN mode. The DEEP POWER-
DOWN command can also be used as a software protection mechanism while the de-
vice is not in active use because in the DEEP POWER-DOWN mode the device ignores
all WRITE, PROGRAM, and ERASE commands.
Driving chip select (S#) HIGH deselects the device, and puts it in the STANDBY POWER
mode if there is no internal cycle currently in progress. Once in STANDBY POWER
mode, the DEEP POWER-DOWN mode can be entered by executing the DEEP POWER-
DOWN command, subsequently reducing the standby current from ICC1 to ICC2.
Once the device has entered the DEEP POWER-DOWN mode, all commands are ignor-
ed except the RELEASE from DEEP POWER-DOWN and READ ELECTRONIC SIGNA-
TURE (RES) commands. These commands release the device from this mode.
The RELEASE from DEEP POWER-DOWN and READ ELECTRONIC SIGNATURE (RES)
commands and the READ IDENTIFICATION (RDID) command also allow the Electronic
Signature of the device to be output on Serial Data Output (Q).
The DEEP POWER-DOWN mode stops automatically at power-down. The device always
powers up in STANDBY POWER mode.
The DEEP POWER-DOWN command is entered by driving S# LOW, followed by the
command code on serial data input (DQ0). S# must be driven LOW for the entire dura-
tion of the sequence.
S# must be driven HIGH after the eighth bit of the command code has been latched in.
Otherwise the DEEP POWER-DOWN command is not executed. As soon as S# is driven
HIGH, it requires a delay of tDP before the supply current is reduced to ICC2 and the
DEEP POWER-DOWN mode is entered.
Any DEEP POWER-DOWN command issued while an ERASE, PROGRAM, or WRITE cy-
cle is in progress is rejected without any effect on the cycle that is in progress.
Figure 18: DEEP POWER-DOWN Command Sequence
7
0
C
MSB
DQ0
LSB tDP
Command
Don’t Care
Deep Power-Down ModeStandby Mode
M25P20 Serial Flash Embedded Memory
DEEP POWER-DOWN
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RELEASE from Deep Power-Down
Once the device has entered deep power-down mode, all commands are ignored except
RELEASE from deep power-down. Executing either of these commands takes the device
out of the deep power-down mode. Except while an ERASE, PROGRAM, or WRITE STA-
TUS REGISTER cycle is in progress, the RELEASE from deep power-down command al-
ways provides access to the 8-bit electronic signature of the device, and can be applied
even if the deep power-down mode has not been entered.
Each command is executed by first driving S LOW to select the device. The command
code is followed by 3 dummy bytes, each bit being latched-in on DQ0 during the rising
edge of C. Then, the 8-bit electronic signature, stored in the memory, is shifted out on
DQ1, each bit being shifted out during the falling edge of C.
S must be driven LOW the entire duration of the sequence for the electronic signature to
be read. However, driving S# HIGH after the command code, but before the entire 8-bit
electronic signature has been output for the first time, still ensures that the device is put
into standby mode.
The RELEASE from deep power-down command is terminated by driving S# HIGH after
the electronic signature has been read at least once. Sending additional clock cycles on
C, while S is driven LOW, causes the electronic signature to be output repeatedly.
When S# is driven HIGH, the device is put in standby mode immediately unless it was
previously in deep power-down mode. If previously in deep power-down mode, the de-
vice transitions to standby mode with delay as follows:
When S# is driven HIGH before the electronic signature is read, transition to standby
mode is delayed by tRES1, as shown in the RELEASE from deep power-down com-
mand sequence. S# must remain HIGH for at least tRES1(MAX).
When S# is driven HIGH after the electronic signature is read, transition to standby
mode is delayed by tRES2. S# must remain HIGH for at least tRES2(MAX), as specified
in the AC Characteristics tables.
Once in standby mode, the device waits to be selected so that it can receive, decode,
and execute instructions. Any release from deep power-down command issued while an
ERASE, PROGRAM, or WRITE cycle is in progress is rejected and has no effect on the
cycle in progress.
Figure 19: RELEASE from Deep Power-Down Sequence
High-Z
DQ1
7
0
C
MSB
DQ0
LSB tRDP
Command
Don’t Care
Deep Power-Down Mode Standby Mode
M25P20 Serial Flash Embedded Memory
RELEASE from Deep Power-Down
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Power-Up/Down and Supply Line Decoupling
At power-up and power-down, the device must not be selected; that is, chip select (S#)
must follow the voltage applied on VCC until VCC reaches the correct value:
VCC, min at power-up, and then for a further delay of tVSL
VSS at power-down
A safe configuration is provided in the SPI Modes section.
To avoid data corruption and inadvertent write operations during power-up, a power-
on-reset (POR) circuit is included. The logic inside the device is held reset while VCC is
less than the POR threshold voltage, VWI – all operations are disabled, and the device
does not respond to any instruction. Moreover, the device ignores the following instruc-
tions until a time delay of tPUW has elapsed after the moment that VCC rises above the
VWI threshold:
WRITE ENABLE
PAGE PROGRAM
SECTOR ERASE
BULK ERASE
WRITE STATUS REGISTER
However, the correct operation of the device is not guaranteed if, by this time, VCC is still
below VCC.min. No WRITE STATUS REGISTER, PROGRAM, or ERASE instruction should
be sent until:
tPUW after VCC has passed the VWI threshold
tVSL after VCC has passed the VCC,min level
If the time, tVSL, has elapsed, after VCC rises above VCC,min, the device can be selected
for READ instructions even if the tPUW delay has not yet fully elapsed.
M25P20 Serial Flash Embedded Memory
Power-Up/Down and Supply Line Decoupling
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Figure 20: Power-Up Timing
VCC
VCC,min
VWI
RESET state
of the
device
Chip selection not allowed
PROGRAM, ERASE, and WRITE commands are rejected by the device
tVSL
tPUW
Time
READ access allowed Device fully
accessible
VCC,max
After power-up, the device is in the following state:
Standby power mode (not the deep power-down mode)
Write enable latch (WEL) bit is reset
Normal precautions must be taken for supply line decoupling to stabilize the VCC sup-
ply. Each device in a system should have the VCC line decoupled by a suitable capacitor
close to the package pins; generally, this capacitor is of the order of 0.1µF.
At power-down, when VCC drops from the operating voltage to below the POR threshold
voltage VWI, all operations are disabled and the device does not respond to any instruc-
tion.
Note: If power-down occurs while a WRITE, PROGRAM, or ERASE cycle is in progress,
some data corruption may result.
M25P20 Serial Flash Embedded Memory
Power-Up/Down and Supply Line Decoupling
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Power-Up Timing and Write Inhibit Voltage Threshold Specifications
Table 8: Power-Up Timing and VWI Threshold
Symbol Parameter Min Max Unit
tVSL VCC(min) to S# LOW 10 μs
tPUW Time delay to write instruction 1.0 10 ms
VWI Write Inhibit voltage (device grade 6) 1.0 2.1 V
VWI Write Inhibit voltage (device grade 3) 1.0 2.1 V
Note: 1. Parameters are characterized only.
M25P20 Serial Flash Embedded Memory
Power-Up Timing and Write Inhibit Voltage Threshold Specifi-
cations
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Maximum Ratings and Operating Conditions
Caution: Stressing the device beyond the absolute maximum ratings may cause perma-
nent damage to the device. These are stress ratings only and operation of the device be-
yond any specification or condition in the operating sections of this datasheet is not
recommended. Exposure to absolute maximum rating conditions for extended periods
may affect device reliability.
Table 9: Absolute Maximum Ratings
Symbol Parameter Min Max Units Notes
TSTG Storage temperature –65 150 °C
TLEAD Lead temperature during soldering See note °C 1
VIO Input and output voltage (with respect to ground) –0.6 VCC + 0.6 V 2
VCC Supply voltage –0.6 4.0 V
VESD Electrostatic discharge voltage (Human Body mod-
el)
–2000 2000 V 3
Notes: 1. The TLEAD signal is compliant with JEDEC Std J-STD-020C (for small body, Sn-Pb or Pb as-
sembly), the Micron RoHS compliant 7191395 specification, and the European directive
on Restrictions on Hazardous Substances (RoHS) 2002/95/EU.
2. The minimum voltage may reach the value of –2V for no more than 20ns during transi-
tions; the maximum may reach the value of VCC +2V for no more than 20ns during tran-
sitions.
3. The VESD signal: JEDEC Std JESD22-A114A (C1 = 100pF, R1 = 1500Ω, R2 = 500Ω).
Table 10: Operating Conditions
Symbol Parameter Min Max Unit
VCC Supply voltage 2.3 3.6 V
TAAmbient operating temperature (grade 6) –40 85 °C
Ambient operating temperature (grade 3) –40 125 °C
Table 11: Data Retention and Endurance
Symbol Condition Min Max Unit
Program/Erase
Cycles
Grade 6 100,000 Cycles per sector
Grade 3 100,000
Data Retention at 55°C 20 Years
M25P20 Serial Flash Embedded Memory
Maximum Ratings and Operating Conditions
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Electrical Characteristics
Table 12: DC Current Specifications (Device Grade 6)
Symbol Parameter Test Conditons Min Max Units
ILI Input leakage current ±2 µA
ILO Output leakage current ±2 µA
ICC1 Standby current S# = VCC, VIN = VSS or VCC 50 µA
ICC2 Deep power-down current S# = VCC, VIN = VSS or VCC 5 µA
ICC3 Operating current (READ) C = 0.1VCC / 0.9VCC at 40 MHz and 75 MHz,
DQ1 = open
8 mA
C = 0.1VCC / 0.9VCC at 20 MHz, DQ1 = open 4 mA
ICC4 Operating current
(PAGE PROGRAM)
S# = VCC 15 mA
ICC5 Operating current
(WRITE STATUS REGISTER)
S# = VCC 15 mA
ICC6 Operating current
(SECTOR ERASE)
S# = VCC 15 mA
ICC7 Operating current
(BULK ERASE)
S# = VCC 15 mA
Table 13: DC Current Specifications (Device Grade 3)
Symbol Parameter Test Conditons Min Max Units
ILI Input leakage current ±2 µA
ILO Output leakage current ±2 µA
ICC1 Standby current S# = VCC, VIN = VSS or VCC 100 µA
ICC2 Deep power-down current S# = VCC, VIN = VSS or VCC 50 µA
ICC3 Operating current (READ) C = 0.1VCC / 0.9VCC at 25 MHz, DQ1 = open 8 mA
C = 0.1VCC / 0.9VCC at 20 MHz, DQ1 = open 4 mA
ICC4 Operating current
(PAGE PROGRAM)
S# = VCC 15 mA
ICC5 Operating current
(WRITE STATUS REGISTER)
S# = VCC 15 mA
ICC6 Operating current
(SECTOR ERASE)
S# = VCC 15 mA
ICC7 Operating current
(BULK ERASE)
S# = VCC 15 mA
Table 14: DC Voltage Specifications
Symbol Parameter Test Conditons Min Max Units
VIL Input LOW voltage –0.5 0.3VCC V
M25P20 Serial Flash Embedded Memory
Electrical Characteristics
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Table 14: DC Voltage Specifications (Continued)
Symbol Parameter Test Conditons Min Max Units
VIH Input HIGH voltage 0.7 VCC VCC + 0.4 V
VOL Output LOW voltage IOL = 1.6mA 0.4 V
VOH Output HIGH voltage IOH = –100µA VCC - 0.2 V
Table 15: Instruction Times, Process Technology (Device Grade 6)
Symbol Parameter Min Typ Max Units Notes
tW WRITE STATUS REGISTER cycle time 1.3 15 ms
tPP PAGE PROGRAM cycle time (256 bytes) 0.8 5 ms 1
PAGE PROGRAM cycle time (n bytes) int (n/8) ×
0.025
tSE SECTOR ERASE cycle time 0.6 3 s
tBE BULK ERASE cycle time 2.5 6 s
Note: 1. When using the PAGE PROGRAM (PP) instruction to program consecutive bytes, opti-
mized timings are obtained with one sequence including all bytes, not several sequences
of only a few bytes (1 n 256).
Table 16: Instruction Times (Device Grade 3)1, 2
Symbol Parameter Min Typ Max Units Notes
tW WRITE STATUS REGISTER cycle time 8 15 ms
tPP PAGE PROGRAM cycle time (256 bytes) 1.5 5 ms 3
PAGE PROGRAM cycle time (n bytes) 0.4 + n ×
1.1/256
tSE SECTOR ERASE cycle time 1 3 s
tBE BULK ERASE cycle time 2.8 6 s
Notes: 1. Preliminary data; typical values are measured at 85°C.
2. See Operating Conditions and AC Measurement Conditions tables for test conditions.
3. When using the PAGE PROGRAM (PP) instruction to program consecutive bytes, opti-
mized timings are obtained with one sequence including all bytes, not several sequences
of only a few bytes (1 n 256).
M25P20 Serial Flash Embedded Memory
Electrical Characteristics
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AC Characteristics
Table 17: AC Measurement Conditions
Symbol Parameter Min Max Unit
CLLoad capacitance 30 30 pF
Input rise and fall times 5 ns
Input pulse voltages 0.2VCC 0.8VCC V
Input timing reference voltages 0.3VCC 0.7VCC V
Output timing reference voltages VCC/2 VCC/2 V
Figure 21: AC Measurement I/O Waveform
Input and output
timing reference levels
Input levels
0.8VCC
0.2VCC
0.7VCC
0.3VCC
0.5VCC
Table 18: Capacitance
Symbol Parameter Test condition Min Max Unit Notes
COUT Output capacitance (DQ1) VOUT = 0 V 8 pF 1
CIN Input capacitance (other pins) VIN = 0 V 6 pF
Note: 1. Values are sampled only, not 100% tested, at TA = 25°C and a frequency of 20 MHz.
M25P20 Serial Flash Embedded Memory
AC Characteristics
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Table 19: AC Specifications (75 MHz, Device Grade 6, VCCmin = 2.7V)
Symbol Alt. Parameter Min Typ Max Unit Notes
fCfC Clock frequency for all commands (except READ) D.C. 75 MHz 1
fR Clock frequency for READ command D.C. 33 MHz
tCH tCLH Clock HIGH time 6 ns 3
tCL tCLL Clock LOW time 6 ns 2
tCLCH Clock rise time (peak-to-peak) 0.1 V/ns 4, 5
tCHCL Clock fall time (peak-to-peak) 0.1 V/ns 4, 5
tSLCH tCSS S# active setup time (relative to C) 5 ns
tCHSL S# not active hold time (relative to C) 5 ns
tDVCH tDSU Data In setup time 2 ns
tCHDX tDH Data In hold time 5 ns
tCHSH S# active hold time (relative to C) 5 ns
tSHCH S# not active setup time (relative to C) 5 ns
tSHSL tCSH S# deselect time 100 ns
tSHQZ tDIS Output disable time 8 ns 4
tCLQV tV Clock LOW to output valid 8/6 ns
tCLQX tHO Output hold time 0 ns
tHLCH HOLD# setup time (relative to C) 5 ns
tCHHH HOLD# hold time (relative to C) 5 ns
tHHCH HOLD# setup time (relative to C) 5 ns
tCHHL HOLD# hold time (relative to C) 5 ns
tHHQX tLZ HOLD# to output Low-Z 8 ns 4
tHLQZ tHZ HOLD# to output High-Z 8 ns 4
tWHSL WRITE PROTECT setup time 20 ns 6
tSHWL WRITE PROTECT hold time 100 ns 6
tDP S# HIGH to deep power-down mode 3 μs 4
tRES1 S# HIGH to STANDBY without READ ELECTRONIC SIGNA-
TURE
30 μs 4
tRES2 S# HIGH to STANDBY with READ ELECTRONIC SIGNATURE 30 μs 4
Notes: 1. 75 MHz operation is available only on the VCC range 2.7V to 3.6V; the maximum fre-
quency in the extended VCC range 2.3V to 2.7V is 40 MHz.
2. Typical values given for TA = 25 °C.
3. The tCH and tCL signal values must be greater than or equal to 1/fC.
4. Value guaranteed by characterization, not 100% tested in production.
5. Expressed as a slew-rate.
6. Only applicable as a constraint for a WRSR command when SRWD is set at 1.
M25P20 Serial Flash Embedded Memory
AC Characteristics
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Figure 22: Serial Input Timing
C
DQ0
S#
MSB IN
DQ1
tDVCH
High-Z
LSB IN
tSLCH
tCHDX
tCHCL
tCLCH
tSHCH
tSHSL
tCHSHtCHSL
Figure 23: Write Protect Setup and Hold during WRSR when SRWD = 1 Timing
C
DQ0
S#
DQ1
High-Z
W#
tWHSL tSHWL
M25P20 Serial Flash Embedded Memory
AC Characteristics
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Figure 24: Hold Timing
tCHHL
tHLCH
tHHCH
tHHQXtHLQZ
S#
C
DQ0
DQ1
HOLD#
tCHHH
Figure 25: Output Timing
C
DQ0
S#
LSB OUT
DQ1 ADDRESS
LSB IN
tSHQZ
tCH
tCL
tQLQH
tQHQL
tCLQX
tCLQV
tCLQX
tCLQV
M25P20 Serial Flash Embedded Memory
AC Characteristics
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Package Information
Figure 26: SO8N 150 mils Body Width
8
1
0.25 mm
GAUGE PLANE
0.10 MIN/
0.25 MAX 0.40 MIN/
1.27 MAX
0o MIN/
8o MAX
0.28 MIN/
0.48 MAX
0.17 MIN/
0.23 MAX
x 45°
0.25 MIN/
0.50 MAX
0.10 MAX
1.75 MAX
1.27 TYP
1.04 TYP
1.25 MIN
3.90 ±0.10
6.00 ±0.20
4.90 ±0.10
Notes: 1. Drawing is not to scale.
2. All dimensions are in millimeters.
M25P20 Serial Flash Embedded Memory
Package Information
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Figure 27: V-PDFN8 6mm x 5mm
6 TYP
5 TYP
0.65 TYP
12°
0.85 TYP/
0.05 MAX
0.20 TYP
0 MIN/
0.05 MAX
4.75 TYP
Pin 1 ID
5.75 TYP
1.27 TYP
3.4 ±0.2
0.6 +0.15
-0.1
0.4 +0.08
-0.05
4.00 ±0.20
Notes: 1. Drawing is not to scale.
2. All dimensions are in millimeters.
M25P20 Serial Flash Embedded Memory
Package Information
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Device Ordering Information
Standard Parts
Micron Serial NOR Flash devices are available in different configurations and densities.
Valid part numbers are at Micron’s part catalog (www.micron.com), and feature and
specification comparisons are at www.micron.com/products. Contact your sales repre-
sentative for devices not found.
For more information on how to identify products and top side marking by the process
identification letter, refer to technical note, TN-12-24: Serial Flash Memory Device
Marking for the M25P, M25PE, M45PE,M25PX, and N25Q Product Families.
Micron recommends the use of the automotive grade device in the automotive environ-
ment, autograde 6 and grade 3. The high reliability certified flow (HRCF) is described in
the quality note QNEE9801. Ask your Micron sales office for a copy. For further informa-
tion on line items not listed here or on any aspect of this device, contact your nearest
representative.
Table 20: Part Number Information Scheme
Part Number
Category Category Details Notes
Device type M25P = Serial Flash memory for code storage
Density 20 = 2Mb (256K x 8)
Security features – = no extra security 1
S = CFD programmed with UID
Operating voltage V = VCC = 2.3V to 3.6V
Package MN = SO8N (150 mils width)
MP = V-PDFN8 6mm x 5mm (MLP8)
Device Grade 6 = Industrial temperature range: –40°C to 85°C. Device tested with standard test flow. 2
Packing Option – = Standard packing
T = Tape and reel packing
Plating technology P or G = RoHS-compliant
Lithography B = T9HX 2
Notes: 1. Secure options are available upon customer request.
2. Exposed pad of 3mm x 3mm.
Note: The category of second Level Interconnect is marked on the package and on the
inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings re-
lated to soldering conditions are also marked on the inner box label.
M25P20 Serial Flash Embedded Memory
Device Ordering Information
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Automotive Parts
Table 21: Part Number Information Scheme
Part Number
Category Category Details Notes
Device type M25P = Serial Flash memory for code storage
Density 20 = 2Mb (256K x 8)
Security features – = no extra security
Operating voltage V = VCC = 2.3V to 3.6V
Package MN = SO8N (150 mils width)
Device Grade 6 = Industrial temperature range: –40°C to 85°C. Device tested with high reliability test
flow.
3 = Automotive temperature range: –40°C to 125°C. Device tested with high reliability
test flow.
1
Packing Option – = Standard packing
T = Tape and reel packing
Plating technology P or G = RoHS-compliant 2
Lithography B = 110nm technology, Fab 2 diffusion plant
Automotive Grade A = Automotive: –40°C to 85°C part. Only with temperature grade 6. Device tested with
high reliability test flow.
1
– = Automotive: –40°C to 125°C.
Notes: 1. Micron recommends the use of the automotive grade device in the automotive environ-
ment, autograde 6 and grade 3.
2. Contact your Micron sales representative for available options.
M25P20 Serial Flash Embedded Memory
Device Ordering Information
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Revision History
Rev. C – 06/18
Added Important Notes and Warnings section for further clarification aligning to in-
dustry standards
Rev. B – 10/13
Added RELEASE from DEEP POWER-DOWN and READ ELECTRONIC SIGNATURE in-
formation.
Rev. A – 02/13
Initial Micron rebrand.
8000 S. Federal Way, P.O. Box 6, Boise, ID 83707-0006, Tel: 208-368-4000
www.micron.com/products/support Sales inquiries: 800-932-4992
Micron and the Micron logo are trademarks of Micron Technology, Inc.
All other trademarks are the property of their respective owners.
This data sheet contains minimum and maximum limits specified over the power supply and temperature range set forth herein.
Although considered final, these specifications are subject to change, as further product development and data characterization some-
times occur.
M25P20 Serial Flash Embedded Memory
Revision History
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