DS1340 Maxim, DS1340 Datasheet - Page 13

• Manufacturer Part Number: DS1340
• Description: The DS1340 is a real-time clock (RTC)/calendar that is pin compatible and functionally equivalent to the ST M41T00, including the software clock calibration
• Manufacturer: Maxim

Figure 8. Data Write—Slave Receiver Mode
Figure 9. Data Read—Slave Transmitter Mode
Figure 10. Data Write/Read (Write Pointer, Then Read)—Slave Receive and Transmit
S - START
A - ACKNOWLEDGE (ACK)
P - STOP
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
S - START
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
S
S
ADDRESS> <R/W>
ADDRESS> <R/W>
1101000
1101000
<SLAVE
<SLAVE
S - START
Sr - REPEATED START
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
______________________________________________________________________________________
XXXXXXXX
<DATA (n)>
0
1
S
A
A
ADDRESS>
<WORD ADDRESS (n)>
1101000
<SLAVE
A
MASTER TO SLAVE
MASTER TO SLAVE
XXXXXXXX
<DATA (n)>
XXXXXXXX
<R/W>
0
<DATA (n + 1)>
XXXXXXXX
A
MASTER TO SLAVE
<WORD ADDRESS (n)>
A
A
I
XXXXXXXX
2
<DATA (n + 1)>
C RTC with Trickle Charger
A
<DATA (n)>
XXXXXXXX
XXXXXXXX
SLAVE TO MASTER
SLAVE TO MASTER
<DATA (n + 2)>
XXXXXXXX
A
SLAVE TO MASTER
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
Sr
A
A
ADDRESS>
(X + 1 BYTES + ACKNOWLEDGE)
1101000
<SLAVE
(X + 1 BYTES + ACKNOWLEDGE)
<DATA (n + 1)>
<DATA (n + 2)>
A
XXXXXXXX
XXXXXXXX
DATA TRANSFERRED
DATA TRANSFERRED
...
<R/W>
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
1
<DATA (n + X)>
XXXXXXXX
A
(X + 1 BYTES + ACKNOWLEDGE)
A
A
DATA TRANSFERRED
...
...
<DATA (n + X)>
<DATA (n + X)
A
XXXXXXXX
XXXXXXXX
P
A
A
P
P
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