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AD9945KCPZRL7 데이터시트(PDF) 8 Page - Analog Devices |
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AD9945KCPZRL7 데이터시트(HTML) 8 Page - Analog Devices |
8 / 16 page REV. A –8– AD9945 INTERNAL REGISTER DESCRIPTION Table I. Internal Register Map Register Address Bits Name A2 A1 A0 Data Bits Function Operation 0 0 0 D0 Software Reset (0 = Normal Operation, 1 = Reset all registers to default) D2, D1 Power-Down Modes (00 = Normal Power, 01 = Standby, 10 = Total Shutdown) D3 OB Clamp Disable (0 = Clamp ON, 1 = Clamp OFF) D5, D4 Test Mode. Should always be set to 00. D6 PBLK Blanking Level (0 = Blank Output to Zero, 1 = Blank to OB Clamp Level) D8, D7 Test Mode 1. Should always be set to 00. D11 to D9 Test Mode 2. Should always be set to 000. Control 0 0 1 D0 SHP/SHD Input Polarity (0 = Active Low, 1 = Active High) D1 DATACLK Input Polarity (0 = Active Low, 1 = Active High) D2 CLPOB Input Polarity (0 = Active Low, 1 = Active High) D3 PBLK Input Polarity (0 = Active Low, 1 = Active High) D4 Three-State Data Outputs (0 = Outputs Active, 1 = Outputs Three-Stated) D5 Data Output Latching (0 = Latched by DATACLK, 1 = Latch is Transparent) D6 Data Output Coding (0 = Binary Output, 1 = Gray Code Output) D11 to D7 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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