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AD9689-2000EBZ 데이터시트(PDF) 86 Page - Analog Devices |
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AD9689-2000EBZ 데이터시트(HTML) 86 Page - Analog Devices |
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86 / 134 page ![]() AD9689 Data Sheet Rev. A | Page 86 of 134 YES UPDATE SETUP/HOLD DETECTOR STATUS (0x0128) INCREMENT SYSREF IGNORE COUNTER YES NO SYSREF IGNORE COUNTER EXPIRED? (0x0121) SYSREF ENABLED? (0x0120) NO CLOCK DIVIDER >1? (0x010B) YES INPUT CLOCK DIVIDER ALIGNMENT REQUIRED? CLOCK DIVIDER AUTO ADJUST ENABLED? YES NO NO NO YES ALIGN CLOCK DIVIDER PHASE TO SYSREF SYNCHRO- NIZATION MODE? (0x01FF) TIMESTAMP MODE NORMAL MODE YES SYSREF INSERTED IN JESD204B CONTROL BITS BACK TO START BACK TO START NO JESD204B LMFC ALIGNMENT REQUIRED? DDC NCO ALIGNMENT ENABLED? (0x0300) YES NO ALIGN PHASE OF ALL INTERNAL CLOCKS (INCLUDING LMFC) TO SYSREF SYNC~ ASSERTED SEND INVALID 8-BIT/ 10-BIT CHARACTERS (ALL 0s) NO YES SEND K28.5 CHARACTERS NORMAL JESD204B INITIALIZATION SYSREF ENABLED IN CONTROL BITS? (0x0559, 0x055A, 0x058F) RESET SYSREF IGNORE COUNTER START SYSREF ASSERTED? YES NO ALIGN DDC NCO PHASE ACCUMULATOR YES SIGNAL MONITOR ALIGNMENT ENABLED? (0x026F) ALIGN SIGNAL MONITOR COUNTERS YES NO NO SYSREF RESETS RAMP TEST MODE GENERATOR RAMP TEST MODE ENABLED? (0x0550) YES NO INCREMENT SYSREF COUNTER (0x012A) SYSREF TIMESTAMP DELAY (0x0123) SYSREF MODE (0x0120) N-SHOT MODE CONTINUOUS MODE CLEAR SYSREF IGNORE COUNTER AND DISABLE SYSREF (CLEAR BIT 2 IN 0x0120) Figure 147. SYSREF Capture Scenarios and Multichip Synchronization |
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