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AD9843A
–11–
REV. 0
Table II. Operation Register Contents (Default Value x000)
Optical Black Clamp Reset Power-Down Modes Channel Selection
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
*
0
*
0
*
1
**
0
*
0 Enable Clamping 0 Normal 0 0 Normal Power 0 0 CCD-Mode
1 Disable Clamping 1 Reset All 0 1 Fast Recovery 0 1 AUX1-Mode
Registers 1 0 Standby 1 0 AUX2-Mode
to Default 1 1 Total Power-Down 1 1 Test Only
*Must be set to zero. **Set to one.
Table III. VGA Gain Register Contents (Default Value x096)
MSB LSB
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Gain (dB)
X00 010111112.0
••
••
••
11 1111111035.965
11 1111111136.0
Table IV. Clamp Level Register Contents (Default Value x080)
MSB LSB
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Clamp Level (LSB)
XXX0000 0000 0
0000 0001 0.25
0000 0010 0.5
••
••
••
11111110 63.5
11111111 63.75
Table V. Control Register Contents (Default Value x000)
Data Out DATACLK CLP/PBLK SHP/SHD CDS Gain
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
X 0 Enable 0* 0* 0 Rising Edge Trigger 0 Active Low 0 Active Low 0 Disabled** 0* 0* 0*
1 Three-State 1 Falling Edge Trigger 1 Active High 1 Active High 1 Enabled
*Must be set to zero.
**When D3 = 0 (CDS Gain Disabled), the CDS Gain Register is fixed at 4 dB (Code 63 dec).
Table VI. CDS Gain Register Contents (Default Value x000)
MSB LSB
D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0 Gain (dB)
*
XXXXX000000+4.3
• •
• •
• •
011110+10.0
100000–2.0
• •
• •
• •
111111+4.0
*Control Register Bit D3 must be set high for the CDS Gain Register to be used.