PAS302BCW-22S Datasheet, PDF (9/15 Pages) Pixart Imaging Inc. – CMOS VGA DIGITAL IMAGE SENSOR

PAS302BCW-22S
CMOS Image Sensor IC
DATA and Am cycles are repeated until the last byte read. After last byte read, Am is no longer
generated by master but instead of keeping SDA line as high. The slave (PAS302BCW-22S)
must releases SDA line back to master to generate STOP condition. (Please refer to Figure
5.3.)
4%"
4$-






4
4UBSU
$POEJUJPO
"EESFTT
38
"$,
GSPN
%BUB
"$,
GSPN
3FDFJWFS
3FDFJWFS
Figure 5.3 Data Transfer Format
5.3 I²C^TM Bus Timing


%BUB

1
"$, 4UPQ
GSPN $POEJUJPO
3FDFJWFS
4%"
UG
4$-
4
U-08
US
UG
U46%"5
U)%45"
U)%45"
U)%%"5
U)*()
U4645"
4S
Figure 5.4 I²C^TM Bus Timing
U41
US
U#6'
U46450
1
4
5.4 I²C^TM Bus Timing Specification
PARAMETER
SYMBOL
SCL clock frequency
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
Set-up time for a repeated START condition
Data hold time. For I²C^TM bus device
Data set-up time
Rise time of both SDA and SCL signals(note)
Fall time of both SDA and SCL signals(note)
Set-up time for STOP condition
Bus free time between a STOP and START
Capacitive load for each bus line
fscl
tHD:STA
tLOW
tHIGH
tSU;STA
tHD;DAT
tSU;DAT
tr
tf
tSU;STO
tBUF
Cb
STANDARD-MODE
MIN.
10
4.0
MAX.
400
-
4.7
-
0.75
-
4.7
-
0
3.45
250
-
30
N.D.
30
N.D.
4.0
-
4.7
-
1
15
UNIT
kHz
µs
µs
µs
µs
µs
ns
ns
ns
µs
µs
pF
Version 2.4, 20 Sep. 2005
PixArt Imaging Inc.
9
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