M41ST85 View Datasheet(PDF) - STMicroelectronics

Part Name

Description

MFG CO.

M41ST85

3.0/3.3V I²C combination serial RTC, NVRAM supervisor and microprocessor supervisor

STMicroelectronics 

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Operating modes

Figure 6. Serial bus data transfer sequence

DATA LINE

STABLE

DATA VALID

CLOCK

M41ST85W

DATA

START

CONDITION

CHANGE OF

DATA ALLOWED

Figure 7. Acknowledgement sequence

START

SCL FROM

MASTER

1

2

DATA OUTPUT

BY TRANSMITTER

MSB

DATA OUTPUT

BY RECEIVER

STOP

CONDITION

AI00587

CLOCK PULSE FOR

ACKNOWLEDGEMENT

8

9

LSB

AI00601

Figure 8. Write cycle timing: RTC & external SRAM control signals

EX

ECON

tEXPD

tEXPD

AI03663

14/41

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