M48Z12 datasheet(11/21 Pages) STMICROELECTRONICS

Part #	M48Z12

Description	5 V, 16 Kbit (2 Kb x 8) ZEROPOWER짰 SRAM

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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11 / 21 page

M48Z02, M48Z12

Operation modes

Doc ID 2420 Rev 7

11/21

Figure 7.

Checking the BOK flag status

READ DATA

AT ANY ADDRESS

AI00607

IS DATA

COMPLEMENT

OF FIRST

READ?

(BATTERY OK)

POWER-UP

YES

NO

WRITE DATA

COMPLEMENT BACK

TO SAME ADDRESS

READ DATA

AT SAME

ADDRESS AGAIN

NOTIFY SYSTEM

OF LOW BATTERY

(DATA MAY BE

CORRUPTED)

WRITE ORIGINAL

DATA BACK TO

SAME ADDRESS

(BATTERY LOW)

CONTINUE

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