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SN65DP149:SN65DP149能否替代PS8402A?

Part Number: SN65DP149

 第一次来TI的论坛,来试试下,最近想用SN65DP149来替代PS8402A的芯片,看了两者规格书和PIN脚定义,SN65DP149工作需要用到3.3V和1.1V,VSADJ的下拉电阻6.5K。PS8402A工作需要用到3.3V和1.5V,REXT的下拉电阻为4.99K,那么我调整后应该是能正常工作的,但是发现只是偶尔出图,并且出图也是1080P@60Hz,达不到4K@30Hz。不知道什么原因,请大神帮忙分析下原因,谢谢了。