M41T62LC6F(2019) 查看數據表（PDF） - STMicroelectronics

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M41T62LC6F
(Rev.:2019)

Low-power serial real-time clocks (RTCs) with alarm

STMicroelectronics 

M41T62, M41T64, M41T65

READ mode

The system-to-user transfer of clock data will be halted whenever the address being read is a clock address (00h

to 07h). The update will resume due to a stop condition or when the pointer increments to any non-clock address

(08h-0Fh).

Note: This is true both in READ mode and WRITE mode.

An alternate READ mode may also be implemented whereby the master reads the M41T6x slave without first

writing to the (volatile) address pointer. The first address that is read is the last one stored in the pointer (see

Figure 15. Alternative READ mode sequence).

Figure 13. Slave address location

R/W

START

SLAVE ADDRESS

A

11 01 00 0

Figure 14. READ mode sequence

BUS ACTIVITY:

MASTER

SDA LINE

S

BUS ACTIVITY:

SLAVE

ADDRESS

WORD

ADDRESS (An)

S

SLAVE

ADDRESS

DATA n

DATA n+1

DATA n+X P

Figure 15. Alternative READ mode sequence

BUS ACTIVITY:

MASTER

SDA LINE

S

BUS ACTIVITY:

SLAVE

ADDRESS

DATA n

DATA n+1

DATA n+X P

DS3840 - Rev 24

page 9/42

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