ICM532B Datasheet, PDF (12/15 Pages) List of Unclassifed Manufacturers – CIF Color CMOS Sensor with USB Output

ICM532B CIF Color CMOS Sensor with USB Output
Data Sheet, V 1.1 November, 2002
C_BID
R_O
R_L
Bi-directional
Buffer
Capacitance
USB Output
6
Impedance
Input
Pull-up/down
Resistance
3
pF
18
Ω
50
KΩ
4. Electrical DC Characteristics
Symbol
V_CC
V_OH
V_UL
V_UH
Parameter
Operating
Power Supply
Output High
Voltage
USB Output
Low Voltage
USB Output
High Voltage
Minimum
3.0
2.4
2.8
Rating
Typical
3.3
Maximum
3.6
0.3
Units
V
V
V
V
6.2. Clocking
The ICM-532B clock is generated from an external low cost 6MHz crystal. The on-board PLL
generates the required USB clock and the Video Clock. The nominal Video Clock rate is 8MHz. This
rate can be altered by setting either the Fastclock ( *1.5 ) or Slowclock ( /2.0 ) register bits.
Video Timing examples:
At 8MHz, the Video clock generates 1 pixel every 250ns, a line (500 pixels) every 125us, and 8 lines
every 1ms. This produces 8 lines to be packed into 1 USB data transfer, to make a 24 fps QVGA (352
x288) transfer rate.
At 12MHz, the Video clock generates 1 pixel every 166.7ns, a line (600 pixels) every 100us, and 10
lines every 1 ms. This produces 10 lines to be packed into 1 USB data transfer, to make a 30 fps QVGA
(320x240) transfer rate.
At 12MHz, the Video clock generates 1 pixel every 166.7ns, a line (500 pixels) every 83.3us, and 12
lines every 1 ms. This produces 6 lines to be packed into 1 USB data transfer, to make a 35 fps QCIF
(176 x 144) transfer rate.
©2000, 2001,2002 IC Media Corporation & IC Media Technology Corp
11/21/2002
page 12
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