M41T81M6F(2006) 查看數據表（PDF） - STMicroelectronics

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M41T81M6F
(Rev.:2006)

Serial access Real-Time Clock with alarm

STMicroelectronics 

M41T81

Operation

An alternate READ Mode may also be implemented whereby the master reads the M41T81

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 8 on page 11).

Figure 6. Slave address location

R/W

START

SLAVE ADDRESS

A

11 0100 0

Figure 7. READ mode sequence

AI00602

BUS ACTIVITY:

MASTER

SDA LINE

S

WORD

ADDRESS (An)

S

BUS ACTIVITY:

SLAVE

ADDRESS

SLAVE

ADDRESS

DATA n

DATA n+1

DATA n+X P

AI00899

Figure 8. Alternative READ mode sequence

BUS ACTIVITY:

MASTER

SDA LINE

S

BUS ACTIVITY:

SLAVE

ADDRESS

DATA n

DATA n+1

DATA n+X P

AI00895

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