BQ2023_16 Datasheet, PDF (13/32 Pages) Texas Instruments – SINGLE-WIRE ADVANCED BATTERY MONITOR IC

From Reset Pulse
Not Recommended for New Designs
bq2023
SINGLEĆWIRE ADVANCED BATTERY MONITOR IC
FOR CELLULAR AND PDA APPLICATIONS
SLUS480B – MAY 2001
APPLICATION INFORMATION
bq2023 Transmits Presence Pulse
ROM
No
Command
Issued?
Yes
Read
ROM
No
Command?
(33H)
Yes
bq2023 Transmits
64 Bit ID ROM
Yes
Starting With Bit 0
Match
ROM
Yes
Command?
(55H)
No
Skip
ROM
Command?
(CCH)
No
Search
ROM
No
Command?
(F0H)
Yes
n=0
Yes
Reset
Pulse
Received?
No
n=0
Selected
State
bq2023 Transmits Bit n,
Transmits the
Complement of Bit n,
Then Receives Bit n
Received
Bit n =
ID ROM Bit n?
Yes
n = 63?
Yes
No
No
n=n+1
bq2023 Receives Bit n
No
Received
Bit n =
ID ROM Bit n?
Yes
n = 63?
No
n=n+1
Yes
Figure 8. ROM Command Flow Chart
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
13