MAX1645-MAX1645A Maxim, MAX1645-MAX1645A Datasheet - Page 15

• Manufacturer Part Number: MAX1645-MAX1645A
• Description: Advanced Chemistry-Independent / Level 2 Battery Chargers with Input Current Limiting
• Manufacturer: Maxim

ever BATTERY_PRESENT = 0 or ChargerMode() is writ-
ten with POR_RESET = 1. The ALARM_INHIBITED sta-
tus bit can also be cleared by writing a new charging
current OR charging voltage.
Figure 3. SMBus a) Write-Word and b) Read-Word Protocols
a) Write-Word Format
b) Read-Word Format
S
S
Legend:
S = Start Condition or Repeated Start Condition
ACK = Acknowledge (logic low)
W = Write Bit (logic low)
0b0001001
0b0001001
ADDRESS
MSB LSB
ADDRESS
MSB LSB
Preset to
Battery Chargers with Input Current Limiting
Preset to
SLAVE
SLAVE
7 bits
7 bits
MASTER TO SLAVE
SLAVE TO MASTER
Advanced Chemistry-Independent, Level 2
1b
W
0
______________________________________________________________________________________
1b
W
0
ACK
1b
0
ACK
1b
0
ChargerSpecInfo() =
ChargerStatus() =
ChargerMode() = 0x12
ChargingCurrent() = 0x14
ChargerVoltage() = 0x15
AlarmWarning() = 0x16
COMMAND
MSB LSB
BYTE
8 bits
0x11
0x13
COMMAND
MSB LSB
BYTE
8 bits
ACK
1b
0
P = Stop Condition
NACK = NOT Acknowledge (logic high)
R = Read Bit (logic high)
S
ACK
ADDRESS
1b
MSB LSB
0
0b0001001
SLAVE
Preset to
7 bits
D7
MSB LSB
DATA
BYTE
8 bits
LOW
1b
R
1
D0
ACK
1b
0
ACK
1b
0
MSB LSB
D7
D15
MSB LSB
DATA
BYTE
8 bits
LOW
DATA
BYTE
HIGH
8 bits
D0
D8
ACK
1b
0
ACK
1b
0
MSB LSB
D15
DATA
BYTE
HIGH
8 bits
P
D8
NACK
1b
1
P
15