BQ25895_16 Datasheet, PDF (31/67 Pages) Texas Instruments – Adjustable Voltage 3.1-A Boost Operation

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8.2.16.6 Single Read and Write
1
7
1
1
S Slave Address 0 ACK
8
Reg Addr
bq25895
SLUSC88A – MARCH 2015 – REVISED MAY 2016
1
ACK
8
Data Addr
1
1
ACK P
Figure 21. Single 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
1
1
NCK P
Figure 22. Single Read
If the register address is not defined, the charger IC send back NACK and go back to the idle state.
8.2.16.7 Multi-Read and Multi-Write
The charger device supports multi-read and multi-write on REG00 through REG14 except REG0C.
Figure 23. Multi-Write
Figure 24. Multi-Read
REG0C is a fault register. It keeps all the fault information from last read until the host issues a new read. For
example, if Charge Safety Timer Expiration fault occurs but recovers later, the fault register REG0C reports the
fault when it is read the first time, but returns to normal when it is read the second time. In order to get the fault
information at present, the host has to read REG0C for the second time. The only exception is NTC_FAULT
which always reports the actual condition on the TS pin. In addition, REG0C does not support multi-read and
multi-write.
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