DS1205S 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS1205S

MultiKey Chip

Dallas Semiconductor -> Maxim Integrated 

SET SECURITY MATCH Figure 5

WRITE SET PASSWORD

IN COMMAND WORD

(SPECIFY WHICH

SECURE PARTITION)

SET SECURE DATA Figure 6

WRITE SET SECURE DATA

IN COMMAND WORD (SPECIFY

WHICH SECURE PARTITION AND

STARTING BYTE ADDRESS)

DS1205S

READ I.D. FIELD FROM

SECURE PARTITION

(64 BITS)

WRITE 64 BITS OF DATA

TO DS1205

(OLD I.D.)

READ I.D. FIELD FROM

SECURE PARTITION

(64 BITS)

WRITE 64 BITS OF DATA

TO DS1205

NO

IS DATA = I.D?

YES

ERASE I.D. AND PASSWORD

FIELD, SECURE DATA

FIELD FOR SELECTED

SECURE PARTITION.

TERMINATE

TRANSACTION

WRITE 64 BITS OF DATA

FOR NEW I.D. FIELD DATA

NO

IS DATA =

PASSWORD?

TERMINATE

TRANSACTION

YES

WRITE DATA TO SECURE

DATA FIELD (STARTING

ADDRESS SPECIFIED IN

COMMAND WORD)*

*Data is written to the DS1205S beginning

at the specified address and continuing

until either Bit 511 is written or the RST

line is brought low.

WRITE 64 BITS OF DATA

FOR NEW PASSWORD

FIELD DATA

TERMINATE TRANSACTION

TERMINATE

TRANSACTION

021798 5/17

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