BQ24296_15 Datasheet, PDF (32/55 Pages) Texas Instruments – bq2429x I2C Controlled 3-A Single Cell USB Charger With Narrow VDC Power Path Management and Adjustable Voltage USB OTG

bq24296, bq24297
SLUSBP6B – SEPTEMBER 2013 – REVISED NOVEMBER 2014
Programming (continued)
9.5.1.5.2 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 27. Multi-Write
www.ti.com
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 28. 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.
REG09 is a fault register. It keeps all the fault information from last read until the host issues a new read. For
example, if there is a TS fault but gets recovered immediately, the host still sees TS fault during the first read. In
order to get the fault information at present, the host has to read REG09 for the second time. REG09 does not
support multi-read and multi-write.
32
Submit Documentation Feedback
Copyright © 2013–2014, Texas Instruments Incorporated
Product Folder Links: bq24296 bq24297