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STA011 数据表(PDF) 29 Page - STMicroelectronics |
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STA011 数据表(HTML) 29 Page - STMicroelectronics |
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29 / 38 page ![]() STA011 Programming specifications 29/38 6.1.7 PFD programming 6.1.8 Fractional spurious compensation Table 25. Frequency phase detector setting D87 D86 D85 D84 D83 Description Notes x x 1 x 1 Normal operation Default configuration x x 1 0 0 Reference divider test, available @Lock Synthesizer test reserved configuration x x 1 1 0 Loop divider test available @ Lock Synthesizer test reserved configuration 0 0 0 x x Charge pump test, high impedance state Synthesizer test reserved configuration 0 1 0 x x Charge pump test, DEC active Synthesizer test reserved configuration 1 0 0 x x Charge pump test, INC active Synthesizer test reserved configuration 1 1 0 x x Charge pump test, DEC&INC active Synthesizer test reserved configuration D82 Down ASYM 0 UP and DOWN sym Startup configuration 1 UP and DOWN asym D81 0 Down Split disabled 1 Down Split enabled Startup configuration Table 26. Fractional spurious compensation D80 Description Notes 0 DAC OFF 1 DAC ON Startup configuration Table 27. DAC current adjustment D79 D78 D77 D76 D75 Description Notes 0 0 1 1 1 N=7 startup configuration Table 28. Down Asym delay setting D74 D73 Description Notes 00 Minimum delay Startup configuration .. .. 1 1 Maximum delay |
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