Other Parts Discussed in Thread:SN65DSI86
最近新打回來的板子偶爾無畫面的現象
看0XF0~0XF8 狀態,其中的0xF5 and 0xF6 出現Error 通知
SN65DSI86 Reg[0xf0]=[0x0]
SN65DSI86 Reg[0xf1]=[0x0]
SN65DSI86 Reg[0xf2]=[0x0]
SN65DSI86 Reg[0xf3]=[0x0]
SN65DSI86 Reg[0xf4]=[0x0]
SN65DSI86 Reg[0xf5]=[0x20]
SN65DSI86 Reg[0xf6]=[0x40]
SN65DSI86 Reg[0xf7]=[0x0]
SN65DSI86 Reg[0xf8]=[0x1]
0xf5=0x20 -> PLL_UNLOCK This bit is set whenever the PLL Lock status transitions from LOCK to UNLOCK.
0xf6=0x40-> LOSS_OF_DP_SYNC_LOCK_ERR. This field is set whenever the DP sync generator has lost lock with the DSI sync stream.
請問這問題要如何解,已卡很久了,請幫忙協助,謝謝
Kailyn Chen:
您好,PLL失锁, 您是使用的REFCLK还是DSICLK作为时钟源的? REFCLK作为输入的话,是否满足datasheet P14的REFCLK的时序要求?
另外,时钟的jitter是否过大从而导致PLL unlock?