VV6501C001 STMicroelectronics, VV6501C001 Datasheet - Page 38

• Manufacturer Part Number: VV6501C001
• Description: IC SENSOR COLOR VGA CMOS 36CLCC
• Manufacturer: STMicroelectronics
• Type: CMOS Imagingr

Specifications of VV6501C001

• Pixel Size: 5.6µm x 5.6µm
• Active Pixel Array: 640H x 480V
• Frames Per Second: 30
• Voltage - Supply: 3V, 5V
• Package / Case: 36-CLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3883; VV6501C001

I2C Registers
5.2.3
Note:
38/60
Register
index
Exposure control registers
There is a set of programmable registers which control the sensor sensitivity. The registers are as
follows:
The gain parameter does not affect the integration period rather it amplifies the video signal at the
output stage of the sensor core.
The external exposure (coarse, fine, clock division or gain) values do not take effect immediately.
Data from the serial interface is read by the exposure algorithm at the start of a video frame. If the
user reads an exposure value via the serial interface, then the value reported will be the data as yet
unconsumed by the exposure algorithm, because the serial interface logic locally stores all the data
written to the sensor.
Between the writing the of exposure data and the use of the data by the exposure logic, bit 0 of the
status register is set. The gain value is updated a frame later than the coarse, fine and clock division
parameters, since the gain is applied directly at the video output stage and does not require the long
set up time of the coarse, fine exposure and of the clock division.
To eliminate the possibility of the sensor array seeing only part of the new exposure and gain
settings, if the serial interface communication extends over a frame boundary, the internal re-timing
of exposure and gain data is disabled while writing data to any location in the exposure page of the
serial interface register map. Thus if the 5 bytes of exposure and gain data is sent as an auto-
increment sequence, it is not possible for the sensor to consume only part of the new exposure and
gain data.
The range of some parameter values is limited and any value programmed out of the range is
clipped to the maximum allowed.
0x2C
0x2D
0x2E
0x20
0x21
0x22
0x23
0x24
0x25
Fine exposure
Coarse exposure time
Analogue gain
Clock division
[7:0]
[7:0]
[7:0]
[3:0]
[1:0]
[7:0]
[7:0]
Bits
0
0
Fine LSB exposure value
Coarse MSB exposure value
Fine MSB exposure value
Coarse LSB exposure value
Analogue gain value
Clock divisor value
Dark offsetH
Dark offsetL
Dark offset control register
Table 12: Exposure, clock rate and gain registers
Function
Default
0x20A
0
0
0
0
0
0
Frame length dependent.
Line length dependent
Maximum for default modes:
VGA = 522
Bits[3:0] IDAC control
See
for details
Dark offset manual settings
[0x25] - Clock divider setting
Comment
VV6501