LTC2941CDCB-1#PBF Linear Technology, LTC2941CDCB-1#PBF Datasheet - Page 12

• Manufacturer Part Number: LTC2941CDCB-1#PBF
• Description: IC, BATTERY FUEL GAUGE LI-ION 5.5V DFN-6
• Manufacturer: Linear Technology

Specifications of LTC2941CDCB-1#PBF

• Battery Management Function: Fuel Gauge, Charge Controller
• Battery Type: Li-Ion
• Supply Voltage Range: 2.7V To 5.5V
• Battery Ic Case Style: DFN
• No. Of Pins: 6
• Rohs Compliant: Yes

applicaTions inFormaTion
LTC2941
Alert Response Protocol
In a system where several slaves share a common inter-
rupt line, the master can use the alert response address
(ARA) to determine which device initiated the interrupt
(Figure 9).

Figure 6. Writing F001h to the LTC2941 Accumulated Charge Registers (C, D)
S
Figure 8. Reading the LTC2941 Accumulated Charge Registers (C, D)
S
ADDRESS
1100100
ADDRESS
1100100
Figure 9. LTC2941 Serial Bus SDA Alert Response Protocol
S
Figure 5. Writing FCh to LTC2941 Control Register (B)
S
Figure 7. Reading the LTC2941 Status Register (A)
ADDRESS
W
S
ALERT RESPONSE ADDRESS
1100100
0
FROM MASTER TO SLAVE
FROM SLAVE TO MASTER
ADDRESS
W
1100100
A
0
0
REGISTER
0001100
A
0
02h
W
0
REGISTER
W
0
00h
A
0
A
0
A
0
REGISTER
REGISTER
02h
S
A
0
01h
ADDRESS
R
1
1100100
A: ACKNOWLEDGE (LOW)
A: NOT-ACKNOWLEDGE (HIGH)
R: READ BIT (HIGH)
W: WRITE BIT (LOW)
S: START CONDITION
P: STOP CONDITION
S
The master initiates the ARA procedure with a START con-
dition and the special 7-bit ARA bus address (0001100)
followed by the read bit (R) = 1. If the LTC2941 is asserting
the AL/CC pin in alert mode, it acknowledges and responds
by sending its 7-bit bus address (1100100) and a 1. While
A
0
A
0
ADDRESS
1100100
A
0
DATA
DEVICE ADDRESS
F0h
DATA
R
FCh
1
11001001
A
0
A
0
R
1
A
0
DATA
DATA
01h
80h
2941 F05
A
0
P
DATA
A
0
81h
A
A
0
1
2941 F06
2941 F09
DATA
P
P
01h
A
1
2941 F07
P
A
1
2941 F08
P
2941fa