DS250DF230: Retimer Configuration and test for 10G

Vinay Kumar

Part Number: DS250DF230

Hi,

We have integrated the DS250 Retimer with the LX2160 NXP Network Processor in one our design. We wanted to configure and test the Retimer for 10G.

Please let us know how to configure and test the said Retimer to 10G.

Thanks & Regards

Vinay

over 4 years ago

0 Rodrigo Natal over 4 years ago

TI__Mastermind 19235 points

Hi,

Please confirm the exact 10G rate you are using (e.g. 10.3125Gbps) and whether you are using CAL_CLK_IN = 25MHz.

Thanks,

Rodrigo Natal

0 Vinay Kumar over 4 years ago in reply to Rodrigo Natal

Prodigy 10 points

Hi,

Yes we are intending to use 10.3125Gbps and clock in is 25MHz.

Thanks,

Vinay

0 Rodrigo Natal over 4 years ago in reply to Vinay Kumar

TI__Mastermind 19235 points

In that case, please refer to the table below taken from retimer programming guide with values for the relevant channel registers to configure CDR for 10.3125Gbps.

Table. Register Settings for Common Data Rates using 25-MHz Calibration Clock

DATA RATE	REG_0x60 VALUE [HEX]	REG_0x61 VALUE [HEX]	REG_0x62 VALUE [HEX]	REG_0x63 VALUE [HEX]	REG_0x18[6:4] VALUE [HEX]
25.78125 Gbps (1)	74	C0	74	C0	0
25.0 Gbps (1)	80	BE	80	BE	0
20.625 Gbps	90	B3	90	B3	0
12.5 Gbps (1)	80	BE	80	BE	1
10.3125 Gbps (1)	90	B3	90	B3	1

Thanks,

Rodrigo Natal

0 Vinay Kumar over 4 years ago in reply to Rodrigo Natal

Prodigy 10 points

Hi,

Unable to find programming guide, Can you please share.

Thanks,

Vinay

0 Rodrigo Natal over 4 years ago in reply to Vinay Kumar

TI__Mastermind 19235 points

You may request access to this document via the TI.com product page. See link below.

https://www.ti.com/drr/opn/DS250DF230-DESIGN

Thanks,

Rodrigo Natal

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DS250DF230: Retimer Configuration and test for 10G