Texas Instruments BQ24765 Evaluation Module for SMBus Controlled Battery Charger with Integrated FETs BQ24765EVM BQ24765EVM 데이터 시트
제품 코드
BQ24765EVM
a) Write-Word Format
S
SLAVE
ADDRESS
W
ACK
COMMAND
BYTE
ACK
LOW DATA
BYTE
ACK
HIGH DATA
BYTE
ACK
P
7 BITS
1b
1b
8 BITS
1b
8 BITS
1b
8 BITS
1b
MSB LSB
0
0
MSB LSB
0
MSB LSB
0
MSB L SB
0
Preset to 0b0001001
ChargeCurrent() = 0x14
D7
D0
D15
D8
ChargeVoltage() = 0x15
InputCurrent()
InputCurrent()
= 0x3F
b) Read-Word Format
S
SLAVE
ADDRESS
W
ACK
COMMAND
BYTE
ACK
S
SLAVE
ADDRESS
R
ACK
LOW DATA
BYTE
ACK
HIGH DATA
BYTE
NACK
P
7 BITS
1b
1b
8 BITS
1b
7 BITS
1b
1b
8 BITS
1b
8 BITS
1b
MSB LSB
0
0
MSB LSB
0
MSB
LSB
1
0
MSB
LSB
0
MSB
LSB
1
Preset to 0b0001001
Register
Preset to
D7
D0
D15
D8
ChargerMode() = 0x12
0b0001001
ChargeMode() = 0x14
ChargeMode() = 0x15
ChargeMode() = 0x3F
ChargeMode() = 0x15
ChargeMode() = 0x3F
LEGEND:
S = START CONDITION OR REPEATED START CONDITION
ACK = ACKNOWLEDGE (LOGIC-LOW)
W = WRITE BIT (LOGIC-LOW)
ACK = ACKNOWLEDGE (LOGIC-LOW)
W = WRITE BIT (LOGIC-LOW)
MASTER TO SLAV
E
SLAVE TO MASTE
R
P = STOP CONDITIO
N
NACK = NOT ACKNOWLEDGE (LOGIC-HIGH
)
R = READ BIT (LOGIC-HIGH
)
ChargerMode() = 0x12
tSU:STA tHD:STA tSU:DAT tHD:DAT tHD:DAT tSU:STO tBUF
www.ti.com
SLUS999 – NOVEMBER 2009
Figure 28. SMBus Write-Word and Read-Word Protocols
Figure 29. SMBus Write Timing
Copyright © 2009, Texas Instruments Incorporated
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