BQ24292I Datasheet, PDF (33/42 Pages) Texas Instruments – I2C Controlled 4.5A Single Cell USB/Adapter Charger With Narrow VDC Power Path Management and USB OTG

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bq24292i
SLUSBI4 – APRIL 2013
If the register address is not defined, the charger IC send back NACK and go back to the idle state.
Multi-Read and Multi-Write
The charger device supports multi-read and multi-write on REG00 through REG08.
1
7
1
1
S Slave Address 0 ACK
8
Reg Addr
1
ACK
8
Slave Address
1
ACK
8
Data to Addr+1
1
ACK
8
Data to Addr+1
1
1
ACK P
Figure 38. Multi-Write
1
7
1
1
S Slave Address 0 ACK
8
Reg Addr
1
1
7
1
1
ACK S Slave Address 1 ACK
8
Data @ Addr
1
ACK
8
Data @ Addr+1
1
ACK
8
1
1
Data @ Addr+1 ACK P
Figure 39. Multi-Read
The fault register REG09 locks the previous fault and only clears it after the register is read. For example, if
Charge Safety Timer Expiration fault occurs but recovers later, the fault register REG09 reports the fault when it
is read the first time, but returns to normal when it is read the second time. To verify real time fault, the fault
register REG09 should be read twice to get the real condition. In addition, the fault register REG09 does not
support multi-read or multi-write.
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