SCS152

DS40150B-page 12

Preliminary

© 1997 Microchip Technology Inc.

6.0

PERSONALIZATION

During the typical life of the device, it must be person-

alized. The following procedure personalizes the

device:

1.

Issue a RESET command.

2.

Issue 147 RDBIT commands.

3.

Issue 64 PUTBIT commands to present the

transport code.

4.

Issue 88 RDBIT commands.

5.

Program the SER field by issuing BITPROG

commands at the appropriate addresses.

6.

Decrement each digit in the token counter to the

proper value by issuing BITPROG and RDBIT

commands as needed.

7.

Program the USER area.

8.

Program the UKEY0 area by clocking to the first

bit of each byte (i.e., addresses 148, 156,

164, …) issuing BITPROG and ERASE com-

mands, and then programming the byte with

BITPROG commands.

9.

Check the contents via the signature function.

10. Set the device to user mode by issuing

a BITPROG commands at addresses 104 and

105.

7.0

MEMORY CONTENTS

7.1

Shipped Devices

7.2

After Personalization

Note:

The internal transport code OK status bit is

reset by the RESET command or when the

device is no longer in issuer mode (which

happens when PC0 and PC1 are pro-

grammed).

Field Name

Contents

CID

Chip identification data

SER

all 1

ISS

1

D4

all 1

D3

all 1

D2

all 1

D1

all 1

D0

all 1

CFG

PC0 = 0, PC1 = 1, LOCK0 = 1

USER0

All 1

UKEY0

Transport code

Field Name

Contents

CID

Chip identification data

SER

Device serial number

ISS

0

D4

Digit 4 of counter

D3

Digit 3 of counter

D2

Digit 2 of counter

D1

Digit 1 of counter

D0

Digit 0 of counter

CFG

PC0 = 1, PC1 = 0,

LOCK0 = 1/0 depending on application

USER0

All 1

UKEY0

Transport code