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AD9949 датащи(PDF) 17 Page - Analog Devices |
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AD9949 датащи(HTML) 17 Page - Analog Devices |
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17 / 36 page ![]() AD9949 Rev. B | Page 17 of 36 Table 14. AFE Operation Register Detail Address Data Bit Content Default Value Name Description 00 [1:0] 0 PWRDOWN 0 = Normal Operation. 1 = Reference Standby. 2/3 = Total Power-Down [2] 1 CLPENABLE 0 = Disable OB Clamp. 1 = Enable OB Clamp. [3] 0 CLPSPEED 0 = Select Normal OB Clamp Settling. 1 = Select Fast OB Clamp Settling. [4] 0 FASTUPDATE 0 = Ignore VGA Update. 1 = Very Fast Clamping when VGA Is Updated. [5] 0 PBLK_LVL DOUT Value during PBLK. 0 = Blank to Zero. 1 = Blank to Clamp Level. [7:6] 0 TEST MODE Test Operation Only. Set to zero. [8] 0 DCBYP 0 = Enable DC restore circuit. 1 = Bypass DC Restore Circuit during PBLK. [9] 0 TESTMODE Test Operation Only. Set to zero. [11:10] 0 CDSGAIN Adjustment of CDS Gain. 0 = 0 dB. 01 = −2 dB. 10 = −4 dB. 11 = 0 dB. Table 15. AFE Control Register Detail Address Data Bit Content Default Value Name Description 03 [1:0] 0 COLORSTEER 0 = Off. 1 = Progressive. 2 = Interlaced. 3 = Three Field. [2] 1 PxGAENABLE 0 = Disable PxGA. 1 = Enable PxGA. [3] 0 DOUTDISABLE 0 = Data Outputs Are Driven. 1 = Data Outputs Are Three-Stated. [4] 0 DOUTLATCH 0 = Latch Data Outputs with DOUT Phase. 1 = Output Latch Transparent. [5] 0 GRAYENCODE 0 = Binary Encode Data Outputs. 1 = Gray Encode Data Outputs. |
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