CS7622 查看數據表（PDF） - Cirrus Logic
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CS7622 Datasheet PDF : 36 Pages
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CS7622
Operation Control 2
Default = 04h; Read/Write (address 05h)
Bit Number
Bit Name
Default
7
6
5
RESERVED
0
0
0
4
3
2
1
0
fs_lvl2
fs_lvl1
fs_lvl0 gain_cal
0
0
1
0
0
Bit
Mnemonic
Function
7:4
-
reserved
Full Scale Level: This is used to set the full scale input range of the CS7622.
3:1
fs_lvl2-0
Since CCDs have various saturation levels, it is advantageous to set the full
scale input range of the CS7622 to match the saturation level of the CCD used.
The table below shows the full scale level choices. (See Table 4)
Gain Calibration: A calibration of the gain stages is required to insure a mono-
tonic digital output. If the user wishes to initiate a calibration, he may do so by
setting this bit to ‘1’, which will invoke a gain calibration sequence immediately.
0
gain_cal
This bit automatically clears itself after a calibration has been initiated. During
the calibration sequence the output will not contain valid data. The input clocks
must be running throughout the whole calibration sequence which lasts for
~760 clocks.
fs_lvl
000
001
010
011
100
101
110
111
Full Scale Voltage
0.3 V
0.4 V
0.5 V
0.6 V
0.7 V
0.8 V
0.9 V
1.0 V
Table 4.
Black Level Control (8 LSBs)
Default = 00h; Read/Write (address 0Bh)
Bit Number
Bit Name
Default
7
6
5
4
3
2
1
0
accumulator accumulator accumulator accumulator accumulator accumulator accumulator accumulator
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
Bit
Mnemonic
Function
7:0
accumulator7-0 Black Level Accumulator: See the description of register OCh.
20
DS322PP1
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