AD9821 Analog Devices, AD9821 Datasheet - Page 10

• Manufacturer Part Number: AD9821
• Description: Complete 12-Bit 40 MSPS Imaging Signal Processor
• Manufacturer: Analog Devices

AD9821
REGISTER DETAILS
D10 D9 D8 D7 D6 D5
0
NOTES
1
2
D10
X
D10
X
D10
X
*Must be set to 0.
Must be set to 0.
Set to 1.
1
0
1
0*
D9
MSB
D9
0
1
1
D9
X
0
1
D8 D7
0*
1
2
D8
0
1
1
D8
X
0*
0
1
DATACLK Polarity
D6
0 Sample on Rising Edge
1 Sample on Falling Edge
Optical Black Clamp
0 Enable Clamping
1 Disable Clamping
MSB
D7
0
0
0
1
1
D7
0
1
1
Table IV. Clamp Level Register Contents (Default Value x080)
Table III. VGA Gain Register Contents (Default Value x000)
Table II. Operation Register Contents (Default Value x000)
Table V. Control Register Contents (Default Value x000)
D6
0
0
0
1
1
D6
0
1
1
D5
0
0
0
1
1
D5
0
•
•
•
1
1
Reset
D4
0 Normal
1 Reset All Registers
to Default
D4
0
0
0
1
1
•
•
•
CLPOB/PBLK Polarity
D5
0 Active Low
1 Active High
D4
0
1
1
–10–
D3
1
1
0
0
0
D3
0
1
1
D2
0
0
0
1
1
Power-Down Modes
D3 D2
0
0
1
1
0
1
0
1
D2
0
1
1
Normal Power
Test Only
Ref-Standby
Total Power-Down
D1
0
0
1
1
1
D4
0*
D1
0
1
1
D3
0*
LSB
D0
0
1
0
0
1
D2
0*
LSB
D0
0
0
1
Channel Selection
D1 D0
0
0
1
1
Clamp Level (LSB)
0
1
2
•
•
•
254
255
D1
0*
0 Test Only
1 Test Only
0 Test Only
1 Imager Mode
Gain (dB)
0.0
•
•
•
35.965
36.0
D0
0*
REV. 0