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參數資料
| 型號： | AD9945 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Complete 12-Bit 40 MHz CCD Signal Processor |
| 中文描述： | 完整的12位40 MHz的CCD信號處理器 |
| 文件頁數： | 8/16頁 |
| 文件大小： | 217K |
| 代理商： | AD9945 |
REV. A
–8–
AD9945
INTERNAL REGISTER DESCRIPTION
Table I. Internal Register Map
Register
Name
Address Bits
A2
A1
A0
Data Bits
Function
Operation
0
0
0
D0
D2, D1
D3
D5, D4
D6
D8, D7
D11 to D9
Software Reset (0 = Normal Operation, 1 = Reset all registers to default)
Power-Down Modes (00 = Normal Power, 01 = Standby, 10 = Total Shutdown)
OB Clamp Disable (0 = Clamp ON, 1 = Clamp OFF)
Test Mode. Should always be set to 00.
PBLK Blanking Level (0 = Blank Output to Zero, 1 = Blank to OB Clamp Level)
Test Mode 1. Should always be set to 00.
Test Mode 2. Should always be set to 000.
Control
0
0
1
D0
D1
D2
D3
D4
D5
D6
D11 to D7
SHP/SHD Input Polarity (0 = Active Low, 1 = Active High)
DATACLK Input Polarity (0 = Active Low, 1 = Active High)
CLPOB Input Polarity (0 = Active Low, 1 = Active High)
PBLK Input Polarity (0 = Active Low, 1 = Active High)
Three-State Data Outputs (0 = Outputs Active, 1 = Outputs Three-Stated)
Data Output Latching (0 = Latched by DATACLK, 1 = Latch is Transparent)
Data Output Coding (0 = Binary Output, 1 = Gray Code Output)
Test Mode. Should always be set to 00000.
Clamp Level
0
1
0
D7 to D0
OB Clamp Level (0 = 0 LSB, 255 = 255 LSB)
VGA Gain
0
1
1
D9 to D0
VGA Gain (0 = 6 dB, 1023 = 40 dB)
NOTE: All register values default to 0x000 at power-up except clamp level, which defaults to 128 decimal (128 LSB clamp level).
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