Hello
I know 0x54[7] is Signal Detect observation bit.
can I get the link speed? 10G or 1G status?
thanks.
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Hello
I know 0x54[7] is Signal Detect observation bit.
can I get the link speed? 10G or 1G status?
thanks.
Hi Paddy,
The DS110DF111 does not have a method to readback the data rate of the incoming signal. Once signal detect is observed, the CDR will attempt locking to both group 0 and group 1 programmed data rates, and will readback if CDR lock is obtained in register 0x02.
Best,
Lucas
thanks.
Another problem
I know "Standard Rate Modes Configurable from Reg_0x2F"
The default data rates are Group 0 = 1.25 Gbps and Group 1 = 10.3125 Gbps.
The means is, I can use 1G or 10G SFP.
If setting 0x2F[7:4] to 0xC0 , than 1G is out of service.
But, Is it possible? only support 1G, than 10G is out of service?
Hi Paddy,
DS110DF111 can be configured to support 1.25 Gbps only through manual data rate configuration. Please perform the following register writes.
Best,
Lucas
Thank you very much for you reply.
The opposite of, If support 10 Gbps only.
Is this correct?
Hi Paddy,
This programming sequence you shared configures the retimer for 10.3125 Gbps only. To configure the retimer for 10 Gbps only, follow the same sequence I provided above for 1.25 Gbps with one change, 0x18[6:4]=0b000 (full-rate).
Best,
Lucas
You mean, don't change 0x60-0x63 register?
like this.
or just only change
0x18[6:4]=0b000 (Full-Rate)
My case is use 'DIP switch' to change speed.
To support 10G or 1G.
Hi Paddy,
- 0x60=0x00 (group 0 rate LSB)
- 0x61=0xB2 (group 0 rate MSB)
- 0x62=0x00 (group 1 rate LSB)
- 0x63=0xB2 (group 1 rate MSB)
- 0x64=0xFF (set PPM tolerance max)
- 0x09[2]=0b1 (enable override divider select)
- 0x18[6:4]=0b000 (Full-Rate)
- 0xA[3:2]=0b11 (assert CDR reset)
- 0xA[3:2]=0b00 (de-assert CDR reset)
This sequence can be used to configure the retimer for 10 Gbps.
- 0x60=0x90 (group 0 rate LSB)
- 0x61=0xB3 (group 0 rate MSB)
- 0x62=0x90 (group 1 rate LSB)
- 0x63=0xB9 (group 1 rate MSB)
- 0x64=0xFF (set PPM tolerance max)
- 0x09[2]=0b1 (enable override divider select)
- 0x18[6:4]=0b000 (Full-Rate)
- 0xA[3:2]=0b11 (assert CDR reset)
- 0xA[3:2]=0b00 (de-assert CDR reset)
This sequence can be used to configure the retimer for 10.3125 Gbps.
Note that 64b/66b encoded 10GbE has a line rate of 10.3125 Gbps. We typically see most customers use 10.3125 Gbps.
Best,
Lucas
Thanks Paddy, please let me know if you have any follow up questions, otherwise I am closing this thread.
Best,
Lucas