BQ2023 Datasheet, PDF (14/27 Pages) Texas Instruments – SINGLE-WIRE ADVANCED BATTERY MONITOR IC FOR CELLULAR AND PDA APPLICATIONS

bq2023
SINGLEĆWIRE ADVANCED BATTERY MONITOR IC
FOR CELLULAR AND PDA APPLICATIONS
SLUS480B – MAY 2001
APPLICATION INFORMATION
Selected
State
Read Memory
No
Page CRC Command?
(C3H)
Yes
bq2023 Receives Low Byte
Address (LSB First) AD7 – AD0
bq2023 Receives High Byte
Address (LSB First) AD15 – AD8
bq2023 Loads Address
Into Address Counter
bq2023 Calculates and
Transmits CRC of Write
Command and Address
bq2023 Transmits 1 Byte of
Data From Data Memory
Pointed to by Address Counter
Selected
State
bq2023 Increments Address Counter
No
End of Data
Memory 32-Byte
Page?
Yes
bq2023 Calculates and
Transmits CRC Byte of
Preceding Page of Data
No
End of Data
Memory?
Yes
Wait for
Reset
Pulse
Figure 9. Read Memory and Generate PAGE CRC Command Flow
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