PixArt Imaging Inc.
PAS6167
CMOS Image Sensor IC
I2CTM Bus Timing
I2CTM Bus Timing Specification
Standard Mode
Unit
Parameter
Symbol
fscl
Min.
Max
SCL clock frequency.
10
400
KHz
µs
Hold time ( repeated ) Start condition.
After this period, the first clock pulse is generated.
Low period of the SCL clock.
High period of the SCL clock.
tHD:STA
4.0
-
tLOW
tHIGH
4.7
0.75
4.7
0
-
µs
µs
µs
µs
ns
-
Set-up time for a repeated START condition.
Data hold time. For I2C-bus device.
Data set-up time.
tSU;STA
tHD;DAT
tSU;DAT
-
3.45
-
250
ns
( notel )
Rise time of both SDA and SCL signals.
Fall time of both SDA and SCL signals.
tr
tf
30
30
N.D.
N.D.
ns
( notel )
Set-up time for STOP condition.
tSU;STO
tBUF
Cb
4.0
4.7
1
-
-
µs
µs
pF
Bus free time between a STOP and START.
Capacitive load for each bus line.
15
Noise margin at LOW level for each connected device.
( Including hysteresis )
0.1
VDD
VnL
VnH
-
-
V
V
Noise margin at HIGH level for each connected device.
( including hysteresis )
0.2
VDD
Note : It depends on the “high” period time of SCL.
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10
PixArt Imaging Inc.
E-mail: fae_service@pixart.com.tw
V1.0, 2009/08/12
PIXART [ PIXART IMAGING INC. ]
