Datasheet

Operation M41T81S
12/32 Doc ID 10773 Rev 7
Note: This is true both in READ mode and WRITE mode.
An alternate READ mode may also be implemented whereby the master reads the
M41T81S 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 9 on page 12).
Figure 7. Slave address location
Figure 8. READ mode sequence
Figure 9. Alternative READ mode sequence
AI00602
R/W
SLAVE ADDRESS
STA RT A
0100011
MSB
LSB
AI00899
BUS ACTIVITY:
ACK
S
ACK ACK ACK
NO ACK
STOP
START
P
SDA LINE
BUS ACTIVITY:
MASTER
R/W
DATA n DATA n + 1
DATA n+X
WORD
ADDRESS (An)
SLAVE
ADDRESS
S
START R/W
SLAVE
ADDRESS
ACK
AI00895
BUS ACTIVITY:
ACK
S
ACK ACK ACK
NO ACK
STOP STA RT
PSDA LINE
BUS ACTIVITY:
MASTER
R/W
DATA n DATA n+1 DATA n+X
SLAVE
ADDRESS