m48t12 STMicroelectronics, m48t12 Datasheet - Page 11

• Manufacturer Part Number: m48t12
• Description: 5.0v, 16 Kbit 2kb X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

M48T02, M48T12
Operation modes
Figure 7.
Checking the BOK flag status
POWER-UP
READ DATA
AT ANY ADDRESS
WRITE DATA
COMPLEMENT BACK
TO SAME ADDRESS
READ DATA
AT SAME
ADDRESS AGAIN
IS DATA
NO
(BATTERY LOW)
COMPLEMENT
OF FIRST
READ?
NOTIFY SYSTEM
(BATTERY OK)
YES
OF LOW BATTERY
(DATA MAY BE
CORRUPTED)
WRITE ORIGINAL
DATA BACK TO
SAME ADDRESS
CONTINUE
AI00607
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