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AD9543 Datasheet(PDF) 41 Page - Analog Devices |
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AD9543 Datasheet(HTML) 41 Page - Analog Devices |
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41 / 66 page ![]() Data Sheet AD9543 Rev. 0 | Page 41 of 66 START TIMEOUT CLOCK: TIME = 0 CAL_COUNT = 0 LOCK REG BIT 3 = 1 TIMEOUT CLOCK: TIME > 50ms CAL_COUNT > 1 NO YES NO YES NO YES CAL_COUNT = CAL_COUNT + 1 APLL LOCK DETECT POLLING LOOP APLL RECALIBRATION LOOP START END END (TO RST_COUNT CHECK) WRITE: CAL REG, BIT 1 = 0 WRITE: REGISTER 0x000F, BIT 0 = 1 WRITE: REGISTER 0x000F, BIT 0 = 1 WRITE: CAL REG, BIT 1 = 1 VCO CALIBRATION OPERATION WRITE: SYNC REG, BIT 3 = 1 WRITE: REGISTER 0x000F, BIT 0 = 1 WRITE: REGISTER 0x000F, BIT 0 = 1 MANUAL DISTRIBUTION SYNCHRONIZATION OPERATION WRITE: SYNC REG, BIT 3 = 0 AUTO SYNC REGISTERS[1:0] = 0 NO YES CAL REG. 0x2100 0x2200 APLL 0 1 LOCK REG. 0x3100 0x3200 SYNC REG. 0x2101 0x2201 AUTO-SYNC REG. 0x10DB 0x14DB Figure 46. AD9543 Analog PLL Initialization Subprocess |
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