AT88SC102 datasheet(6/11 Pages) ATMEL

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Table 5.

AT88SC101/102 Micro Instructions

Instruction

Bit

Word

Application Zone

Global

(When Fuse 2 =

READ

RESET

n INC;position counter

on bit

——

—

WRITE ( WRITE 0)

RESET

n INC; position counter

on bit

WRITE0

INC; go to next bit

WRITE0;...

——

RESET

n INC; n = 1392 (101)

n = 1440 (102)

WRITE 0

ERASE (WRITE 1)

—

RESET

n INC;position counter on

first bit in word

WRITE 1

n INC;position counter on

first bit in next word

WRITE 1...

verify erase keys

AT88SC101 Zone 1/88SC102 Zone 2:

RESET

32 CMP

n INC; n = 1232 (101), n = 1280 (102)

VERIFY 1; verify 1 in EC

WRITE 0; write 0 in EC

WRITE 1; erase application zone

AT88SC102 Zone 1:

RESET

48 CMP

n INC; n = 736

WRITE 1; erase application zone

RESET

n INC; n = 1392 (101)

n = 1440 (102)

WRITE 1

CMP

• SECURITY

CODE

—

RESET

79 INC; position counter on

bit preceding SC

16 CMP; verify security code

n INC;If none of the 1st

4 bits of the SCAC is 1,

then 4 unsuccessful

attempts have been

made to verify SC,

and the device is

inoperable. If any of the

1st 4 bits is a 1, then:

WRITE 0

WRITE 1; Reset the SCAC

——

CMP

• ERASE KEYS

—

RESET

n INC;position counter on bit

preceding access

code or erase key

n CMP;verify access code or

erase key

; n = 32 or 48 bits

——

AT88SC101/102

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