HCS101T-I/SN - Microchip Technology



2001 Microchip Technology Inc. Preliminary DS41115C-page 1

HCS101

FEATURES

Operating

• 2 Programmable 32-bit serial numbers

• 10-bit serial number

• 66-bit transmission code length

• Non-volatile 16-bit counter

• 3.5V -13.3V operation

• 3 inputs, 7 functions available

• Selectable baud rate

• Automatic code word completion

• Battery low signal transmitted to receiver

Other

• Pin-out compatible with most KEELOQ®Encoders

• Simple programming interface

• On-chip EEPROM

• On-chip oscillator and timing components

• Button inputs have internal pull-down resistors

• Minimum External Components required

Typical Applications

The HCS101 is ideal for remote control applications.

These applications include:

• Low-end automotive alarm systems

• Low-end automotive immobilizers

• Gate and garage door openers

• Identity tokens

• Low-end burglar alarm systems

• Fan and lighting controls

•Toys

DESCRIPTION

The HCS101 from Microchip Technology Inc. is a fixed

code encoder designed for remote control systems. It

provides a small package outline and low cost to make

this device a perfect solution for unidirectional remote

control systems.

It is also pin compatiblewith Microchip’s HCS201 Code

Hopping Encoder allowing easy upgrading to a more

secure remote keyless entry (RKE) system.

The 8-pin HCS101 operates over a wide voltage range

of 3.5V to 13.3V and has three button inputs allowing

the system designerthe freedomto utilize up to 7 func-

tions. The only components required for device opera-

tion are the buttons andRF circuitry, allowing a verylow

system cost.

PACKAGE TYPES

HCS101 BLOCK DIAGRAM

VDD

DATA

VSS

PDIP, SOIC

HCS101

VSS

VDD

Power

latching

and

switching

Button input port

Transmit register

EEPROM

DATA

S2 S1 S0

Oscillator

RESET Circuit Controller

Fixed Code Encoder

HCS101

DS41115C-page 2 Preliminary

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2001 Microchip Technology Inc.

1.0 SYSTEM OVERVIEW

As indicated in the block diagram in Figure 1-1, the

HCS101 has a small EEPROM array, which must be

loaded with several parameters before use. These

parameters include:

• Two 32-bit serial numbers

• 16-bit counter value

• Additional 10-bit serial number

• Configuration data

The EEPROM data for each transmitter is programmed

by the manufacturer at the time of production.

Any type of controller may be used as a receiver, but it

is typically a microcontroller with compatible firmware

that allows the receiver to operate in conjunction with a

transmitter, based on the HCS101.

FIGURE 1-1: BASIC OPERATION OF TRANSMITTER ENCODER

EEPROM Array

Serial Number 1

Transmitted Information

Serial Number 3

Counter

Serial

Number 3 Function

Bits

Function

Bits

Serial Number 1



2001 Microchip Technology Inc. Preliminary DS41115C-page 3

HCS101

2.0 DEVICE OPERATION

As shown in the typical application circuits in Figure 2-

1, the HCS101 is easy to use. It requires only the addi-

tion of buttons and RF circuitry for use as the transmit-

ter in your application.A descriptionof each pin is given

in Table 2-1.

FIGURE 2-1: TYPICAL CIRCUITS

TABLE 2-1: PIN DESCRIPTIONS

The HCS101 will wake-up upon detecting a switch clo-

sure and then delay for a debounce delay (TDB)as

shown in Figure 2-2. The device will then update the

16-bit counter before it loads the transmit register. The

data is then transmitted serially on the DATA pin in

Pulse Width Modulation (PWM) format.

If additionalbuttons are pressed during a transmission,

the current transmission is terminated. The HCS101

restarts and the new transmission will contain the latest

button information. When all buttons are released, the

device completes the current code word and then pow-

ers down. Released buttons do not terminate and/or

restart transmissions.

FIGURE 2-2: ENCODER OPERATION

Name Pin

Number Description

S0 1 Switch input 0

S1 2 Switch input 1

S2 3 Switch input2/Clockpin for

Programming mode

NC 4 No connection

VSS 5 Ground reference connection

DATA 6 Pulse Width Modulation (PWM)

output pin/Data pin for

Programming mode

NC 7 No connection

VDD 8 Positive supply voltage connection

VDD

Tx out

VDD

DATA

VSS

2 button remote control

Tx out

VDD

DATA

VSS

4buttonremotecontrol

B3 B2 B1 B0

Note: Upto7functionscanbeimplemented

by pressing more than one button

simultaneously or by using a suitable

diode array.

VDD

Power-Up

RESET and Debounce Delay

Sample Inputs

Update Counter

Load Transmit Register

Buttons

Added

All

Buttons

Released

(A button has been pressed)

Transmit

Stop

Yes

Complete Code

Word Transmission

HCS101

DS41115C-page 4 Preliminary

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2001 Microchip Technology Inc.

3.0 TRANSMITTED WORD

3.1 Transmission Format (PWM Mode)

The HCS101 transmission is made up of several code

words as shown in Figure 3-1. Each code word starts

with a preamble and a header, followed by the data.

The code word is followed by a guard period before the

next code word begins. The same code word is trans-

mitted as long as the button is pressed. Refer to

Table 7-3 for transmission timing requirements.

3.2 Code Word Organization

The HCS101 transmits a 66-bit code word. The 66-bit

word is constructed from the serial numbers, counter

and function information. The code word format is

showninFigure3-2.

Under normal conditions, serial number 1istransmitted

with the counter and serial number 3. If all the buttons

are pressed, serial number 2 is transmitted in place of

the counter and serial number 3.

FIGURE 3-1: CODE WORD TRANSMISSION FORMAT

FIGURE 3-2: CODE WORD ORGANIZATION

LOGIC ‘0’

LOGIC ‘1’

Bit

Period

Preamble Header Counter, SER_3

and Function

Guard

Time

Tp Th Tg

Start Pulse

(Te)

SER_1

and Function

Serial Number 3

(10 bits)

Transmission Direction

Serial Number 1Function**

(0/4 bits) (32/28 bits)**

* See Section 4.3.6, S3 Setting (S3SET)

** See Section 4.3.7 Extended Serial Number (XSER)

*** Serial Number 2 is transmitted when all buttons are pressed LSb first

S2 S1 S0 S3*

(16 bits)

Counter ‘00’

(2 bits)

Function

(4 bits)

‘1’

(1 bit) VLOW

(1 bit)

Serial Number 2***

(32 bits)

MSb LSb



2001 Microchip Technology Inc. Preliminary DS41115C-page 5

HCS101

4.0 EEPROM MEMORY

ORGANIZATION

The HCS101 contains 192 bits (12 x 16-bit words) of

EEPROM memory as shown in Table 4-1. Further

descriptions of the memory array are given in the fol-

lowing sections.

TABLE 4-1: EEPROM MEMORY MAP

4.1 CNTR (Counter)

This is the 16-bit gray code counter value that can be

used to track the number of times a transmitter has

been activated.

4.2 SER_1, SER_2, SER_3 (Encoder

Serial Number)

SER_1, and SER_2 are the 32-bit device serial num-

bers.SER_3 is an additional 10-bitserial number trans-

mitted with every transmission. The most significant 6

bits of the 16-bit SER_3 word are reserved and should

be set to zero.

4.3 Configuration Word

The configuration word is a 16-bit word stored in the

EEPROM array that is used by the device to store the

status configuration options. Further explanations of

each of the bits are described in the following sections.

TABLE 4-2: CONFIGURATION WORD

4.3.1 OSCILLATOR TUNING BITS

(OSC0 TO OSC3)

These bits are used to tune the nominal frequency of

the HCS101 to within ±10% of its nominal value over

temperature and voltage.

4.3.2 LOW VOLTAGE TRIP POINT

SELECT (VLOWS)

The low voltage trip point selectbit (VLOWS) and the S3

setting bit (S3SET) are used to determine the voltage

level for the low voltage detector.

* See also Section 4.3.6

4.3.3 BAUDRATE SELECT BITS (BRS)

BRS selects the speed of transmission and the code

word blanking. Table 4-3 shows how the bit is used to

selectthe different baud rates and Section 5.2 provides

a detailed explanation of code word blanking.

TABLE 4-3: BAUDRATE SELECT

WORD

ADDRESS MNEMONIC DESCRIPTION

0 RESERVED Set to 0000H

1 RESERVED Set to 0000H

2 RESERVED Set to 0000H

3 RESERVED Set to 0000H

4 CNTR Counter

5 RESERVED Set to 0000H

6 SER_1 Device Serial Number 1

(word0)16LSb’s

7 SER_1 Device Serial Number 1

(word1)16MSb’s

8 SER_2 Device Serial Number 2

(word0)16LSb’s

9 SER_2 Device Serial Number 2

(word1)16MSb’s

10 SER_3 Device Serial Number 3

11 CONFIG Config Word

Bit Number Bit Name

0OSC0

1OSC1

2OSC2

3OSC3

LOWS

5BRS

6MTX4

7 TXEN

8 S3SET

9 XSER

10 RESERVED

11 RESERVED

12 RESERVED

13 RESERVED

14 RESERVED

15 RESERVED

VLOWS S3SET* Trip Point

004.4

014.4

109

116.75

BRS Basic Pulse

Element Code Words

Transmitted

0 400µs All

1 200µs 1 out of 2

HCS101

DS41115C-page 6 Preliminary

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2001 Microchip Technology Inc.

4.3.4 MINIMUM FOUR TRANSMISSIONS

(MTX4)

If this bitiscleared, atleast one code word is completed

when the HCS101 is activated. If this bit is set, at least

four complete code words are transmitted.

4.3.5 TRANSMIT PULSE ENABLE (TXEN)

If this bit is cleared, no start pulse occurs before a

transmission. If the bit is set, a start pulse (1 TElong) is

transmitted before the first code word’s preamble.

4.3.6 S3 SETTING (S3SET)

This bit determinesthe value of S3 in the function code

during a transmission and the high trip point selected

by VLOWS in Section 4.3.2. If this bit is cleared, S3 mir-

rors S2 during a transmission. If the S3SET bit is set,

S3 in the function code is always set, independent of

the value of S2.

4.3.7 EXTENDED SERIAL NUMBER

(XSER)

If this bit is cleared, the most significant four bits of the

32-bit Serial Number 1 are replaced with the function

code. If this bit is set, the full 32-bit Serial Number 1 is

transmitted.

5.0 SPECIAL FEATURES

5.1 Code Word Completion

Code word completion is an automatic feature that

ensures the entire code word is transmitted, even if the

button is released before the transmission is complete.

If the button is held down beyond the time for one code

word, multiple code words will result. If another button

is activated during a transmission, the active transmis-

sion will be aborted and a new transmission will begin

using the new button information.

5.2 Blank Alternate Code Word

Federal Communications Commission (FCC) Rules,

Part 15 specify the limits on fundamental power and har-

monics that can be transmitted. Power is calculated on

the worst case average power transmitted in a 100 ms

window. It is therefore advantageous to minimize the

duty cycle of the transmission by minimizing the duty

cycle of the individual bits and by blanking out consecu-

tive words. The transmission duty cycle can be lowered

by setting BRS. This reduces the average power trans-

mitted and hence, assists in FCC approval of a transmit-

ter device. Shortening the code word length and

transmitting only every other code word (Figure 5-1) also

may allow a higher amplitude transmission for greater

range.

5.3 Auto-Shutoff

The auto-shutoff function automatically stops the

device from transmitting if a button inadvertently gets

pressed for longer than the time-out period, TTO.This

will prevent the device from draining the battery if a but-

ton gets pressed while the transmitter is in a pocket or

purse.

5.4 VLOW: Voltage LOW Indicator

The VLOW bit is included in every transmission and will

be transmitted as a one if the operating voltage has

dropped below the low voltage trip point. Refer to

Figure 3-2. The trip point is selectable based on the

battery voltage being used. See Section 4.3.2 for a

description of how the low voltage select option is set.

FIGURE 5-1: CODE WORD TRANSMISSIONS

One Code Word

BRS = 0

BRS = 1

100ms 100ms 100ms 100ms

Amplitude

Time



2001 Microchip Technology Inc. Preliminary DS41115C-page 7

HCS101

6.0 PROGRAMMING THE HCS101

When using the HCS101 in a system, the user will have

to program some parameters into the device, including

the serial number and the counter, before it can be

used. The programming cycle allows the user to input

a 192-bit serial data stream which is then stored inter-

nally in EEPROM. Programming will be initiated by

forcing the DATA line high after the S2 line has been

held high for the appropriate length of time. Refer to

Table 6-1 and Figure 6-1.

After the Program mode is entered, a delay must be

provided to the device for the automatic bulk write cycle

to complete. This willwrite all locations in the EEPROM

to all zeros. The device can then be programmed by

clocking in 16 bits at a time, using S2 as the clock line

and DATA as the data in line. After each 16-bit word is

loaded,a programmingdelay is required for the internal

program cycle to complete. This delay can take up to

Twc.

The HCS101 will signal that the write is complete by

sending out a train of ACK pulses, TACKH high, TACKL

low on DATA. The ACK pulses will continue until S2 is

dropped. These times can be used to calculate the

oscillator calibration value. The first pulse’s width

should NOT be used for calibration.

At theend of the programming cycle, the device can be

verified as shown in Figure 6-2 by reading back the

EEPROM. Reading is done by clocking the S2 line and

reading the data bits on the DATA pin.A verify opera-

tion can only be done once, immediately following

the program cycle.

FIGURE 6-1: PROGRAMMING WAVEFORMS

FIGURE 6-2: VERIFY WAVEFORMS

Note: To ensure that the device does not acci-

dentally enter Programming mode, DATA

should never be pulled high by the circuit

connected to it. Special care should be

taken when driving PNP RF transistors.

DATA

Enter Program

Mode

(Data)

(Clock)

Note: S0 and S1 button inputs to be held to ground during the entire programming sequence.

Bit0 Bit1 Bit2 Bit3 Bit14 Bit15 Bit 16 Bit 17

TPH1

TPBW

TPS

Repeat 12 times for each word

TPH2

TCLKH

TCLKL TWC

TDS

Data for Word 1

TDH

TCLKL

Initiate DataPolling Here

Write Cycle

Complete Here

TACLKL

TACLKH

Calibration Pulses

TPHOLD

DATA

(Clock)

(Data)

Note: If a Verify operation is to be done, then it must immediately follow the Program cycle.

End of

Programming Cycle Begin Verify Cycle Here

Bit1 Bit2 Bit3 Bit15

Bit 14 Bit 16 Bit 17 Bit190Bit191

TWC

Data in Word 0

TDV

Bit 0Bit191Bit190

HCS101

DS41115C-page 8 Preliminary

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2001 Microchip Technology Inc.

TABLE 6-1: PROGRAMMING/VERIFY TIMING REQUIREMENTS

Note 1: Typical values - not tested in production

VDD = 5.0V ± 10%

25° C±5°C

Parameter Symbol Min. Max. Units

Program mode setup time TPS 2.0 5.0 ms

Hold time 1 TPH14.0 — ms

Hold time 2 TPH250 — µs

Bulk Write time TPBW 4.0 — ms

Program delay time TPROG 4.0 — ms

Program cycle time TWC 50 — ms

Clock low time TCLKL 50 — µs

Clock high time TCLKH 50 — µs

Data setup time TDS 0—µs

Data hold time TDH 30 — µs

Data out valid time TDV —30µs

Hold time TPHOLD 100 — µs (1)

Acknowledge low time TACKL 800 — µs (1)

Acknowledge high time TACKH 800 — µs (1)



2001 Microchip Technology Inc. Preliminary DS41115C-page 9

HCS101

7.0 ELECTRICAL CHARACTERISTICS FOR HCS101

Absolute Maximum Ratings†

VDD Supply voltage .....................................................................................................................................-0.3 to 13.5 V

VIN Input voltage ................................................................................................................................-0.3 to VDD +0.3V

VOUT Output voltage .......................................................................................................................... -0.3 to VDD +0.3V

IOUT Max output current......................................................................................................................................... 50 mA

TSTG Storage temperature (Note).............................................................................................................. -55 to +125°C

TLSOL Lead soldering temp (Note)......................................................................................................................... 300°C

VESD ESD rating ....................................................................................................................................................2000 V

TABLE 7-1: DC CHARACTERISTICS

†NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the

device. This is a stress rating only and functional operation of the device at those or any other condi-

tions above those indicated in the operation listings of this specification is not implied. Exposure to

maximum rating conditions for extended periods may affect device reliability.

Commercial (C):TAMB =0°Cto+70°C Industrial (I):TAMB =-40°Cto+85°C

3.5V < VDD < 5.0V 5.0V < VDD < 13.3V

Parameter Sym. Min. Typ1Max. Min. Typ1Max. Unit Conditions

Operating Current

(avg)(2) ICC —0.5 —2

Standby Current ICCS 0.1 1.0 0.1 1.0 µA

Auto-shutoff

Current(3,4) ICCS 40 75 160 300 µA

High Level Input

Voltage VIH 0.55VDD VDD+0.3 2.75 VDD+0.3 V

Low Level Input

Voltage VIL -0.3 0.15VDD -0.3 0.75 V

High Level Output

Voltage VOH 0.6VDD 3.3 V

VIOH =-1.0mAVDD =3.5V

IOH =-2.0mAVDD =10V

Low Level Output

Voltage VOL 0.08VDD 0.4 V

VIOL =1.0mAVDD =3.5V

IOL =2.0mAVDD = 10V

Pull-down Resistance;

S0-S2 RSO-240 60 80 40 60 80 kΩVDD =4.0V

Pull-down Resistance;

DATA RDATA 80 120 160 80 120 160 kΩVDD =4.0V

Note 1: Typical values are at 25°C.

2: No load.

3: Auto-shutoff current specification does not include the current through the input pulldown resistors.

4: Auto-shutoff current is periodically sampled and not 100% tested.

HCS101

DS41115C-page 10 Preliminary

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2001 Microchip Technology Inc.

FIGURE 7-1: POWER-UP AND TRANSMIT TIMING

TABLE 7-2: POWER-UP AND TRANSMIT TIMING(2)

FIGURE 7-2: PREAMBLE/HEADER FORMAT

FIGURE 7-3: DATA WORD FORMAT (XSER = 0)

Standard Operating Conditions (unless otherwise specified):

Commercial (C): 0°C ≤TA ≤+70°C

Industrial (I):-40°C ≤TA ≤+85°C

Symbol Parameters Min. Typ. Max. Units Conditions

TBP Time to second button press 10 + Code

Word Time — 26 + Code

Word Time ms (Note 1)

TTD Transmit delay from button detect 12 — 26 ms

TDB Debounce delay 6 — 20 ms

TTO Auto-shutoff time-out period — 27 — s

Ts Start pulse delay — 4.5 — ms

Note 1: TBP is the time in which a second button can be pressed without completion of the first code word and the

intention was to press the combination of buttons.

2: Typical values - not tested in production.

Button Press Detect

TDB

DATA

TTD

Code Word Transmission

TTO

Code

Word

Code

Word

Code

Word

Code

Word

TBP

Preamble Header

P1 P12

23 TE10 TE

Data Word

Transmission

Bit 0 Bit 1

Header

Bit 30 Bit 31 Bit 32 Bit 33 Bit 58 Bit 59

Guard

LSBLSB MSB MSB S3* S0 S1 S2 Vlow

Time

Serial Number 1 Function Code Status

Bit 60 Bit 61 Bit 62 Bit 63 Bit 64 Bit 65

* See S3SET

Counter & Serial Number 3

& Function Code



2001 Microchip Technology Inc. Preliminary DS41115C-page 11

HCS101

TABLE 7-3: CODE WORD TRANSMISSION TIMING REQUIREMENTS

VDD = +3.5 to 13.3V

Commercial (C):TAMB =0°Cto+70°C

Industrial (I):TAMB =-40°Cto+85°C

Code Words Transmitted

All 1 out of 2

Symbol Characteristic Number of TEMin. Typ. Max. Min. Typ. Max. Units

TEBasic pulse element 1 360 400 440 180 200 220 µs

TBP PWM bit pulse width 3 — 3 — — 3 — ms

TPPreamble duration 24 8.64 9.6 10.56 4.32 4.8 5.28 ms

THHeader duration 10 3.6 4.0 4.4 1.8 2.0 2.2 ms

THOP Hopping code duration 96 34.56 38.4 42.24 17.28 19.2 21.12 ms

TFIX Fixed code duration 102 36.72 40.8 44.88 18.36 20.4 22.44 ms

TGGuard Time 39 14.04 15.6 17.16 7.02 7.8 8.58 ms

Total Transmit Time 271 97.56 108.4 119.24 48.78 54.2 59.62 ms

PWM data rate 925 833 757 1851 1667 1515 bps

Note: The timing parameters are not tested but derived from the oscillator clock.

HCS101

DS41115C-page 12 Preliminary



2001 Microchip Technology Inc.

8.0 PACKAGING INFORMATION

8.1 Package Marking Information

8-Lead PDIP (300 mil)

8-Lead SOIC (150 mil)

XXXXXXXX

XXXXXNNN

YYWW

HCS101

XXXXXNNN

0025

XXXXXXX

XXXYYWW

NNN

HCS101

XXX0025

NNN

Legend: XX...X Customer specific information*

Y Year code (last digit of calendar year)

YY Year code (last 2 digits of calendar year)

WW Week code (week of January 1 is week ‘01’)

NNN Alphanumeric traceability code

Note: In the event the full Microchip part number cannot be marked on one line, it will

be carried over to the next line thus limiting the number of available characters

for customer specific information.

*Standard PICmicro device marking consists of Microchip part number, year code, week code, and

traceability code. For PICmicro device marking beyond this, certain price adders apply. Please check

with your Microchip Sales Office. For QTP devices, any special marking adders are included in QTP

price.



2001 Microchip Technology Inc. Preliminary DS41115C-page 13

HCS101

8.2 Package Details

8-Lead Plastic Dual In-line (P) - 300 mil (PDIP)

Units INCHES* MILLIMETERS

Dimension Limits MIN NOM MAX MIN NOM MAX

Number of Pins n88

Pitch p.100 2.54

Top to Seating Plane A .140 .155 .170 3.56 3.94 4.32

Molded Package Thickness A2 .115 .130 .145 2.92 3.30 3.68

Base to Seating Plane A1 .015 0.38

Shoulder to Shoulder Width E .300 .313 .325 7.62 7.94 8.26

Molded Package Width E1 .240 .250 .260 6.10 6.35 6.60

Overall Length D .360 .373 .385 9.14 9.46 9.78

Tip to Seating Plane L .125 .130 .135 3.18 3.30 3.43

Lead Thickness c.008 .012 .015 0.20 0.29 0.38

Upper Lead Width B1 .045 .058 .070 1.14 1.46 1.78

Lower Lead Width B .014 .018 .022 0.36 0.46 0.56

Overall Row Spacing § eB .310 .370 .430 7.87 9.40 10.92

Mold Draft Angle Top α51015 51015

Mold Draft Angle Bottom β51015 51015

* Controlling Parameter

Notes:

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed

JEDEC Equivalent: MS-001

Drawing No. C04-018

.010” (0.254mm) per side.

§ Significant Characteristic

HCS101

DS41115C-page 14 Preliminary



2001 Microchip Technology Inc.

8-Lead Plastic Small Outline (SN) - Narrow, 150 mil (SOIC)

Foot Angle φ048048

1512015120

Mold Draft Angle Bottom 1512015120

Mold Draft Angle Top 0.510.420.33.020.017.013BLead Width 0.250.230.20.010.009.008

Lead Thickness

0.760.620.48.030.025.019LFoot Length 0.510.380.25.020.015.010hChamfer Distance 5.004.904.80.197.193.189DOverall Length 3.993.913.71.157.154.146E1Molded Package Width 6.206.025.79.244.237.228EOverall Width 0.250.180.10.010.007.004A1Standoff § 1.551.421.32.061.056.052A2Molded Package Thickness 1.751.551.35.069.061.053AOverall Height 1.27.050

Pitch 88

Number of Pins MAXNOMMINMAXNOMMINDimension Limits MILLIMETERSINCHES*Units

45°

* Controlling Parameter

Notes:

Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed

.010” (0.254mm) per side.

JEDEC Equivalent: MS-012

Drawing No. C04-057

§ Significant Characteristic



2001 Microchip Technology Inc. Preliminary DS41115C-page 15

HCS101

ON-LINE SUPPORT

Microchip provides on-line support on the Microchip

World Wide Web (WWW) site.

The web site is used by Microchip as a means to make

files and information easily available to customers. To

view the site, the user musthave access to the Internet

and a web browser, such as Netscape or Microsoft

Explorer. Files are also available for FTP download

from our FTP site.

ConnectingtotheMicrochipInternetWebSite

The Microchip web site is available by using your

favorite Internet browser to attach to:

www.microchip.com

The file transfer site is available by using an FTP ser-

vice to connect to:

ftp://ftp.microchip.com

Thewebsiteandfiletransfersiteprovideavarietyof

services. Users may download files for the latest

Development Tools, Data Sheets, Application Notes,

User's Guides, Articles and Sample Programs. A vari-

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Systems Information and Upgrade Hot Line

The Systems Information and Upgrade Line provides

system users a listing of the latest versions of all of

Microchip's development systems software products.

Plus, this line provides information on how customers

can receive any currently available upgrade kits.The

Hot Line Numbers are:

1-800-755-2345 for U.S. and most of Canada, and

1-480-792-7302 for the rest of the world.

HCS101

DS41115C-page 16 Preliminary



2001 Microchip Technology Inc.

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DS41115C

HCS101

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5. What deletions from the data sheet could be made without affecting the overall usefulness?

6. Is there any incorrect or misleading information (what and where)?

7. How would you improve this document?

8. How would you improve our software, systems, and silicon products?



2001 Microchip Technology Inc. Preliminary DS41115C-page 17

HCS101

HCS101 PRODUCT IDENTIFICATION SYSTEM

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Sales and Support

Package: P = Plastic DIP (300 mil Body), 8-lead)

SN = Plastic SOIC (150 mil Body), 8-lead

Temperature Blank = 0°C to +70°C

Range: I=–40°Cto+85°C

Device: HCS101 =Code Hopping Encoder

HCS101T =Code Hopping Encoder (Tape and Reel)

HCS101 - /P

Data Sheets

Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recom-

mended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following:

1. Your local Microchip sales office.

2. The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277.

3. The Microchip Worldwide Site. (www.microchip.com)

Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using.

New Customer Notification System

HCS101

DS41115C-page 18 Preliminary



2001 Microchip Technology Inc.

NOTES:

2001 Microchip Technology Inc. Preliminary DS41115C - page 19

Information contained in this publication regarding device

applications and the like is intended through suggestion only

and may be superseded by updates. It is your responsibility to

ensure that your application meets with your specifications.

No representation or warranty is given and no liability is

assumed by Microchip Technology Incorporated with respect

to the accuracy or use of such information, or infringement of

patents or other intellectual property rights arising from such

use or otherwise. Use of Microchip’s products as critical com-

ponents in life support systems is not authorized except with

express written approval by Microchip. No licenses are con-

veyed, implicitly or otherwise, under any intellectual property

rights.

Trademarks

The Microchip name and logo, theMicrochip logo, PIC, PICmicro,

PICMASTER, PICSTART, PRO MATE, KEELOQ,SEEVAL,

MPLAB and The Embedded Control Solutions Company are reg-

istered trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

Total Endurance, ICSP, In-Circuit Serial Programming, FilterLab,

MXDEV, microID,

Flex

ROM,

fuzzy

LAB, MPASM, MPLINK,

MPLIB, PICC, PICDEM, PICDEM.net, ICEPIC, Migratable

Memory, FanSense, ECONOMONITOR, Select Mode, dsPIC,

rfPIC and microPort are trademarks of Microchip Technology

Incorporated in the U.S.A.

Serialized Quick Term Programming(SQTP) is a service mark

of Microchip Technology Incorporated in the U.S.A.

All other trademarks mentioned herein are property of their

respective companies.

Printed on recycled paper.

Microchip received QS-9000 quality system

certification for its worldwide headquarters,

design and wafer fabrication facilities in

Chandlerand Tempe,Arizonain July 1999.The

Company’s quality system processes and

procedures are QS-9000 compliant for its

PICmicro®8-bit MCUs, KEELOQ®code hopping

devices, Serial EEPROMs and microperipheral

products. In addition, Microchip’s quality

system for the design and manufacture of

development systems is ISO 9001 certified.

Note the following details of the code protection feature on PICmicro®MCUs.

• The PICmicro family meets the specifications contained in the Microchip Data Sheet.

• Microchip believes that its family of PICmicro microcontrollersis one of the mostsecure products of its kind on the market today,

when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowl-

edge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet.

The person doing so may be engaged in theft of intellectual property.

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• NeitherMicrochip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not

mean that we are guaranteeing the product as “unbreakable”.

• Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of

our product.

If you have any further questions about this matter, please contact the local sales office nearest to you.

DS41115C-page 20 Preliminary



2001 Microchip Technology Inc.

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