Datasheet

LTC2941-1
12
29411f
applicaTions inFormaTion
SCL
SDA
START
CONDITION
STOP
CONDITION
ADDRESS R/W ACK DATA ACK DATA ACK
1 - 7 8 9
29411 F04
a6 - a0 b7 - b0 b7 - b0
1 - 7 8 9 1 - 7 8 9
P
S
Figure 4. Data Transfer Over I
2
C or SMBus
FROM MASTER TO SLAVE
S W
ADDRESS REGISTER DATA
FROM SLAVE TO MASTER
29411 F05
A: ACKNOWLEDGE (LOW)
A: NOT-ACKNOWLEDGE (HIGH)
R: READ BIT (HIGH)
W: WRITE BIT (LOW)
S: START CONDITION
P: STOP CONDITION
A A A
0
1100100 01h FCh
0 0 0
P
Figure 5. Writing FCh to LTC2941-1 Control Register (B)
S W
ADDRESS REGISTER DATA
29411 F06
A A A
0
1100100 02h F0h 01h
0 0 0
0
P
DATA
A
Figure 6. Writing F001h to the LTC2941-1 Accumulated Charge Registers (C, D)
S W
ADDRESS REGISTER S
29411 F07
A A ADDRESS
0
1100100 00h 1
0 0 1100100
0
P
R
1
A
81h
DATA
A
Figure 7. Reading the LTC2941-1 Status Register (A)
S W
ADDRESS REGISTER S
29411 F08
A A ADDRESS
0
1100100 02h 1
0 0 1100100
0
P
R
0
A
80h
DATA
01h
DATA
A
1
A
Figure 8. Reading the LTC2941-1 Accumulated Charge Registers (C, D)
S R
ALERT RESPONSE ADDRESS DEVICE ADDRESS
29411 F09
A
1
0001100 11001001
0 1
P
A
Figure 9. LTC2941-1 Serial Bus SDA Alert Response Protocol