bq20z45
SLUS800–MARCH 2009 .................................................................................................................................................................................................. www.ti.com
T
LOW
T
HD:STA
SCLK
T
R
T
F
T
T
T
HIGH
T
SU:STA
HD:STA
SU:STO
T
SU:DAT
T
HD:DAT
SDATA
T
BUF
P
S
S
P
Start
Stop
T
LOW:SEXT
†
†
SCLK
SCLK
ACK
ACK
T
T
T
LOW:MEXT
LOW:MEXT
LOW:MEXT
SCLK
SDATA
A. SCLKACK is the acknowledge-related clock pulse generated by the master.
Figure 1. SMBus Timing Diagram
10
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