VS6552 Datasheet, PDF (11/26 Pages) STMicroelectronics – VGA Color CMOS Image Sensor Module

VS6552
Symbol
Parameter description
Min.
f_CLK
Clock frequency input^a
6.5 - 1%^a
a.Nominal frequencies are 6.5 to 26MHz with a 1% center frequency tolerance
Typ.
-
Max.
26 + 1%^b
Table 12. Timing Characteristics
Symbol
Parameter description
Min.
t_MSCL
t_LOW
t_HIGH
t_SP
MSCL clock frequency
0
Clock pulse width low
1.3
Clock pulse width high
0.6
Pulse width of spikes which are suppressed
by the input filter
0
t_BUF
t_HD.STA
t_SU.STA
t_HD.DAT
t_SU.DAT
t_R
t_F
t_SU.STO
Ci/o
Bus free time between transmissions
Start hold time
Start set-up time
Data in hold time
Data in set-up time
MSCL/MSDA rise time
MSCL/MSDA fall time
Stop set-up time
Input / Output capacitance (MSDA)
1.3
0.6
0.6
0
100
20+0.1C_ba
20+0.1 C_b
0.6
Cin
Input capacitance (MSCL)
a.Cb = total capacitance on the lines
Max.
400
50
0.9
300
300
8
6
Unit
kHz
µs
µs
ns
µs
µs
µs
µs
ns
ns
ns
µs
pF
pF
Figure 4. CCI AC characteristics
stop start
start stop
MSDA
...
Unit
MHz
t_BUF
t_LOW t_R
t_F
t_HD.STA
MSCL
...
t_HD.STA
t_HD.DAT t_HIGH t_SU.DAT
t_SU.STA t_SU.STO
Note: The VS6552 maximum I2C frequency of 400 kHz is only valid for external clock frequencies at or above 19.2 MHz. Due to a design
issue, for external clock frequencies below 19.2MHz, the maximum guaranteed I2C frequency is limited to 200 kHz.
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