STC-A33A
User Guide
30
Rev 1.0
Command No.
Command Descriptions
12H:
MOD3[7…0]
[The camera function mode 3] Initial data: MOD3[7…0] = 0
This sets the following camera function modes.
D[7…0]
D7
D6
D5
D4
D3
D2
D1
D0
D7 to D5:
No function
Always set “000”
D4 to D3
Exposure start mode
00: Normal
10 to 11 reset,
01: No function (Prohibited setting. Do not set these values)
D2:
No function
Always set “0”
D1 to D0:
Gamma mode
00: 1.0
01: 0.45
10 to 11: 1.0
13H:
MOD4[7…0]
[The camera function mode 4] Initial data:
MOD4[7…0] =1
This sets the following camera function modes.
D[7…0]
D7
D6
D5
D4
D3
D2
D1
D0
D7 to D4:
No function
Set always “0000”
D3 to D0:
External sync
phase adjust
0111: 7CLK
0110: 6CLK
0101: 5CLK
0100: 4CLK
0011: 3CLK
0010:2CLK
0001: 1CLK
0000: 0CLK
1111: -1CLK,
1110:-2CLK
1101: -3CLK
1100: -4CLK
1011: -5CLK
1010:-6CLK
1001: -7CLK
1000: -8CLK
14H:
UART[7…0]
[The communication mode] Initial data: UART[7…0] = 0
This sets the following camera function modes.
D[7…0]
D7
D6
D5
D4
D3
D2
D1
D0
D7 to D2:
No function
Always set “000000”
D1 to D0:
Baud rate
00: 38,400bps
01: 9,600bps
10 to 11: No function
(Prohibited setting. Do not set these values)
20H:
SVR[7…0]
21H:
SVR[15…8]
[The exposure time (H) of the electronic shutter]
Initial data: SVR[15…0] = 0, data range: 0 to 4095
This and SHR[15…0] set the preset shutter speed (or CCD exposure time) for the electronic shutter.
The preset shutter speed is defined by the following formula:
Preset Shutter Speed = SVR[15…0] x (1H cycle time) + SHR[15…0] x (1CLK cycle time)
Notes:
1. The data in 20H through 23H reflects to the present shutter speed.
2. The camera works with the shutter off (maximum shutter speed) when both SVR[] and SHR[] are set to 0.
3. The camera works with the minimum shutter speed when this value is set to 0 and SHR[] is set between 1
and 306.
4. The value replaces by 4095 automatically when this value is set to greater than 4095.
