PixArt Imaging Inc.
PAS005B
CMOS Image Sensor IC
5.3 I2C Bus Timing
SDA
tBUF
tHD;STA
tr
tf
tSP
tf
tr
tSU;DAT
tLOW
SCL
tSU;STO
P
S
S
Sr
tHD;STA
tSU;STA
tHD;DAT
tHIGH
Fig 5.4 I2C Bus Timing
5.4 I2C Bus Timing Specification
STANDARD-MODE
UNIT
PARAMETER
SYMBOL
MIN.
10
MAX.
400
-
SCL clock frequency
kHz
us
f
scl
Hold time (repeated) START condition.
After this period, the first clock pulse is generated.
4.0
t
HD:STA
Low period of the SCL clock
4.7
0.75
4.7
0
-
us
us
us
us
ns
t
t
t
t
t
t
t
t
t
LOW
HIGH
SU;STA
HD;DAT
SU;DAT
r
HIGH period of the SCL clock
-
Set-up time for a repeated START condition
Data hold time. For I2C-bus device
Data set-up time
-
3.45
250
30
-
Rise time of both SDA and SCL signals
Fall time of both SDA and SCL signals
Set-up time for STOP condition
Bus free time between a STOP and START
Capacitive load for each bus line
N.D.
ns(note1)
30
N.D.
ns(note1)
f
4.0
4.7
1
-
-
us
us
pF
V
SU;STO
BUF
15
-
C
V
b
Noise margin at LOW level for each connected
device (including hysteresis)
Noise margin at HIGH level for each connected
device (including hysteresis)
nL
nH
0.1 VDD
0.2 VDD
-
V
V
Note: It depends on the "high" period time of SCL.
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PixArt Imaging Inc.
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