VV5430 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
VV5430 Datasheet PDF : 33 Pages
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Read data from camera
VV5430
9. Read data from camera
Information describing the current configuration and the current exposure values can be read from the camera. The data is
formed into four bytes of 8 bits. Each pair of bytes is considered to be a data word and is read out msb first.
Read = 1
Camera acknowledge (valid address)
S ADDRESS[7:1]
R/W A
DATA[31:24]
A
001 0 0 x x 1
Master acknowledge
DATA[23:16]
Master acknowledge
DATA[15:8]
A
DATA[7:0]
A
AP
Figure 9 : Read Data Format
The following tables defines the information contained in the read messages. By default, the Primary Read Data is accessed;
only if a Secondary Read Select bit is set in Setup Code_2 (header code 0010) is the Secondary information read.
Primary Read Data:
Secondary Read Data:
Bit
31 - 23
22 - 14
13 - 10
9
8
7
6
5
4
3-0
Function
Coarse Exposure Value (9 bits)
Fine Exposure Value (9 bits)
Gain Value (4 bits)
Auto Exposure Control on/off
Internal Black Calibration on/off
Auto Gain Control on/off
Gamma or Linear Video Output
Normal or Backlit mode1
Undefined
Camera Type ID Code (4 bits)
Bit
31 - 18
17
16 - 0
Function
Undefined
Black Level monitor in progress
White Pixel count (17 bits)
1. Bit 5 of the Primary Read message only reflects the state
of the BKLIT pin, not the combined result of the pin and
the serial interface BKLIT control bit.
CD5430F-A
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