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DS160PR410: DS160PR410 loss link or high data rate working issue

Frank Xiao
Genius 12055 points
Part Number: DS160PR410

Hi team,

My customer is using the DS160PR410 now and find some random low speed issue.

Currently we have two assumptions:

1.redriver isn't in reset condition when PCIE reset period.

2.redriver setting isn't correct.

So we want to check 1) whether we can let the redriver in reset mode until PCIE reset release.(Currrently we use the SMBUS to write redriver with host).

2)For the setting, our process are as below.(We plan to set CTLE gain to index14, DC gain to 0dB, Vod to 0dB. 
1)follow　graph 1 to set the CTLE gain, the datasheet steps are as the graph 2. Step 3 need to disable EQ1 bypass, then write0x04 0x00 with 0x01mask. but we didn't use disable EQ1 bypass step.
address: 0x30 write 0xff   value 0x01
0address: 0x30 write 0xfc  value 0x08x30（select channel）
address: 0x30 write 0x04   value 0x16 
address: 0x30 write 0x04   value 0x16 
address: 0x30 write 0x03  value 0x80  
address: 0x30 write 0x03   value 0x86   
address: 0x30 write 0x03  value 0x86 
address: 0x30 write 0x03  value 0xB6 （CTLE gain  index 14）
address: 0x30 write 0x04  value 0x16  
address: 0x30 write 0x04  value 0x16 (DC gain 0dB)
address: 0x30 write 0x06   value 0XC0  
address: 0x30 write 0x06   value 0XC0 （VOD gain 0dB）  
graph 1: index gain 14
graph 2 steps

graph 3 schematic

Thanks.