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CDCM6208: CDCM6208出现一会PLL lock,一会PLL unlock

Part Number: CDCM6208

我在使用 CDCM6208 进行时钟分配设计时,遇到了一个异常问题:芯片的 PLL 在运行过程中会周期性地锁定后又失锁PLL_UNLOCK 引脚状态在高低之间不断切换,表现为反复进入“锁定 → 失锁 → 再锁定”的循环。

以下是我的配置与使用情况:

Register 0: 01B7
Register 1: 0060
Register 2: 02CE
Register 3: 00F0
Register 4: 30AB
Register 5: 0001
Register 6: 0016
Register 7: 0001
Register 8: 0016
Register 9: 0003
Register 10: 0160
Register 11: 0000
Register 12: 0001
Register 13: 0160
Register 14: 0000
Register 15: 0051
Register 16: 0160
Register 17: 0000
Register 18: 0051
Register 19: 0160
Register 20: 0000
Register 21: 0000
Register 40: 0000
Inputs:
Primary Input Frequency: 25
Secondary Input Frequency: 25
Version 1
C1: 0
R2: 0
C2: 0
R3: 0
C3: 0
Charge Pump: 0

status0现象为: