BQ25703A Datasheet, PDF (32/81 Pages) Texas Instruments – I2C Multi-Chemistry Battery Buck-Boost Charge Controller With System Power Monitor and Processor Hot Monitor

bq25703A
SLUSCU1 – MAY 2017
Programming (continued)
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Figure 22. Multi Read
8.5.1.8 Write 2-Byte I2C Commands
A few I2C commands combine two 8-bit registers together to form a complete value. These commands include:
• ChargeCurrent()
• MaxChargeVoltage()
• IIN_DPM()
• OTGVoltage()
• InputVoltage()
Host has to write LSB command followed by MSB command. No other command can be inserted in between
these two writes. The charger waits for the complete write to the two registers to decide whether to accept or
ignore the new value.
After the completion of LSB and MSB bytes, the two bytes will be updated at the same time. If host writes MSB
byte first, the command will be ignored. If the time between write of LSB and MSB bytes exceeds watchdog
timer, both the LSB and MSB commands will be ignored.
8.6 Register Map
I2C ADDR
(MSB/LSB)
01/00
03/02
05/04
31/30
33/32
35/34
37/36
39/38
3B/3A
21/20
23/22
25/24
27/26
Table 4. Charger Command Summary
REGISTER NAME
ChargeOption0()
ChargeCurrent()
MaxChargeVoltage()
ChargeOption1()
ChargeOption2()
ChargeOption3()
ProchotOption0()
ProchotOption1()
ADCOption()
ChargerStatus()
ProchotStatus()
IIN_DPM()
ADCVBUS/PSYS()
TYPE
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R
R
R
R
DESCRIPTION
LINKS
Charge Option 0
Go
7-bit charge current setting
Go
LSB 64 mA, Range 8128 mA
11-bit charge voltage setting
Go
LSB 16 mV, Default: 1S-4192mV, 2S-8400mV,
3S-12592mV, 4S-16800mV
Charge Option 1
Go
Charge Option 2
Go
Charge Option 3
Go
PROCHOT Option 0
Go
PROCHOT Option 1
Go
ADC Option
Go
Charger Status
Go
Prochot Status
Go
7-bit input current limit in use
Go
LSB: 50 mA, Range: 50 mA - 6400 mA
8-bit digital output of input voltage,
Go
8-bit digital output of system power
PSYS: Full range: 3.06 V, LSB: 12 mV
VBUS: Full range: 3.2 V - 19.52 V, LSB 64 mV
32
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