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FM

31

64

FM3130 Integrated RTC/Alarm with 64Kb FRAM

Rev. 3.2

Sept. 2011

Page 16 of 22

Figure 12. Register Byte Write

* Although not required, it is recommended that A7-A4 in the Register Address byte are

zeros in order to preserve compatibility with future devices.

S

A

Slave Address

0

A

Data Byte

A

P

By Master

Start

Address & Data

Stop

Acknowledge

0 0 0

By FM3130

0

Address