Datasheet

17
Serial Communication Timing Specification (T
A
=T
OPR
)
Symbol Parameter Minimum Typical Maximum Unit Notes
t
CYCH
Cycle time, host to bq2010
3--ms
See note
t
CYCB
Cycle time, bq2010 to host
3-6ms
t
STRH
Start hold, host to bq2010
5--ns
t
STRB
Start hold, bq2010 to host
500 - -
µ
s
t
DSU
Data setup
- - 750
µ
s
t
DH
Data hold
750 - -
µ
s
t
DV
Data valid
1.50 - - ms
t
SSU
Stop setup
- - 2.25 ms
t
SH
Stop hold
700 - -
µ
s
t
SV
Stop valid
2.95 - - ms
t
B
Break
3--ms
t
BR
Break recovery
1--ms
Note: The open-drain DQ pin should be pulled to at least V
CC
by the host system for proper DQ operation. DQ
may be left floating if the serial interface is not used.
TD201002.eps
DQ
(R/W
V
1
V
)
t
STRH
t
STRB
t
DSU
t
DH
t
DV
t
SV
t
SSU
t
SH
t
CYCH,
t
CYCB,
t
B
t
BR
DQ
(R/W
V
0
V
)
DQ
(BREAK)
Serial Communication Timing Illustration
bq2010