DS1340U Datasheet, PDF (13/16 Pages) Maxim Integrated Products – I2C RTC with Trickle Charger

DS1340
I²C RTC with Trickle Charger
<SLAVE
ADDRESS> <R/W>
<WORD ADDRESS (n)>
S 1101000 0 A
XXXXXXXX
A
S - START
A - ACKNOWLEDGE (ACK)
MASTER TO SLAVE
P - STOP
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
<DATA (n)>
XXXXXXXX
<DATA (n + 1)>
<DATA (n + X)
A
XXXXXXXX
A ... XXXXXXXX
SLAVE TO MASTER
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
AP
Figure 8. Data Write—Slave Receiver Mode
<SLAVE
ADDRESS> <R/W>
<DATA (n)>
S 1101000 1 A
XXXXXXXX
A
S - START
MASTER TO SLAVE
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
<DATA (n + 1)>
<DATA (n + 2)>
<DATA (n + X)>
XXXXXXXX
A
XXXXXXXX
A ...
XXXXXXXX
SLAVE TO MASTER
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
AP
Figure 9. Data Read—Slave Transmitter Mode
<SLAVE
ADDRESS> <R/W>
<WORD ADDRESS (n)>
<SLAVE
ADDRESS> <R/W>
S 1101000 0 A
XXXXXXXX
A Sr 1101000 1 A
<DATA (n)>
<DATA (n + 1)>
<DATA (n + 2)>
<DATA (n + X)>
XXXXXXXX
A
XXXXXXXX
A
XXXXXXXX
A ... XXXXXXXX
AP
S - START
Sr - REPEATED START
MASTER TO SLAVE
A - ACKNOWLEDGE (ACK)
P - STOP
A - NOT ACKNOWLEDGE (NACK)
R/W - READ/WRITE OR DIRECTION BIT ADDRESS
SLAVE TO MASTER
DATA TRANSFERRED
(X + 1 BYTES + ACKNOWLEDGE)
NOTE: LAST DATA BYTE IS FOLLOWED BY A NACK.
Figure 10. Data Write/Read (Write Pointer, Then Read)—Slave Receive and Transmit
Maxim Integrated
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