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这二者serdes应该是不兼容的,929传输的FDPlink是35bit 格式:This device transmits a 35-bit symbol over a single serial pair operating up to 3.36Gbps line rate
而926接收的是28bit FPDlink mode:It receives 28-bits of data over a single serial FPD-Link II pair operating at the line rate of 420 Mbps to 1.82 Gbps.
谢谢Kailyn的回复
但我觉得929和926是兼容的,可以互相连接。
1. DS90UB926Q-Q1的手册第17页了:
The DS90UB926Q-Q1 deserializer receives 35 bits of data over a single serial FPD-Link III pair operating up to
2.975-Gbps application payload. The serial stream contains an embedded clock, video control signals, and the
DC-balanced video data and audio data which enhance signal quality to support AC coupling.
所以926也是支持35bits的。
2. DS90UB929-Q1的手册第1页也有应用框图,929和926相连
3. 当929配置为内部产生测试图像时,926是可以正确解串图像给我们的处理器
只是929外接Hdmi作为图像输入时,926解串后的数据线全为0,hsync,vsync都正确解串了,所以我觉得是不是929开发板要做什么配置。
我们试了信号发送器 笔记本作为929的hdmi输入都不可以,926解串后的数据线一直是0
抱歉,二者确实是兼容的,926同样也是支持35bit数据。
那么926输出除了数据为零,那么输出Pass, lock,PCLK引脚都正常吗?
926是否也disable了Pattern Generator(Reg 0X65)?
Pass和Lock都是高电平 , PCLK是40MHZ
926的0x64寄存器是0xe0, 0x65寄存器是0x00, 所以应该是关闭了926的pattern Generator
就数据线是0