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AD9523 Datasheet(PDF) 39 Page - Analog Devices |
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AD9523 Datasheet(HTML) 39 Page - Analog Devices |
39 / 60 page ![]() Data Sheet AD9523 Rev. D | Page 39 of 60 START TIMEOUT CLOCK: TIME = 0 CAL_COUNT = 0 R0x22C[1] = 1 TIMEOUT CLOCK: TIME > 100ns TIMEOUT CLOCK: TIME >PLL2_TO1 CAL_COUNT > 1 ISSUE A PIN LEVEL RESET OR SOFT RESET NO YES NO YES NO YES RST_COUNT = RST_COUNT + 1 APPLY VDD (ALL DOMAINS) START VDD SETTLED? APPLY REFERENCE INPUT(S) SUBPROCESS: WRITE REGISTERS FROM SETUP FILE POR: WAIT 60ms CAL_COUNT = CAL_COUNT + 1 RST_COUNT >0 RAISE FLAG FOR DEBUGGING. READ: R0x22C TO R0x22D START TIMEOUT CLOCK: TIME = 0 R0x22C[0] = 1 NO YES NO YES END RST_COUNT = 0 YES NO NO YES PLL1 LOCK DETECT POLLING LOOP PLL2 LOCK DETECT POLLING LOOP PLL2 RECALIBRATION LOOP CHIP LEVEL RESET LOOP USER POWER SUPPLIES INITIALIZATION AND POWER-ON RESET WAIT 1PLL2_TO IS A CALCULATED TIMEOUT VALUE. SEE THE THEORY OF OPERATION, COMPONENT BLOCKS—INPUT PLL (PLL1) FOR ITS FORMULA. WRITE: R0x234 = 0x01 WRITE: R0x0F3[1] = 1 WRITE: R0x234 = 0x01 ISSUE VCO CALIBRATION COMMAND WRITE: R0x0F3[1] = 0 Figure 44. AD9523 Device Initialization |
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