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Altera_Forum
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11 years ago

Custom PHY 8b/10b test fails but 8b is OK

Hi, I am trying to validate my Custom PHY design with the transceiver toolkit. I am using the transceiver toolkit to generate test-patterns. My setup is very similar to the setup in The Transce...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

OK, the timing violations seem to be "harmless" as they were associated with the the pattern generator. Altera has set a false path on them in their cyclone v gs reference designs (http://www.altera.com/support/examples/on-chip-debugging/on-chip-debugging.html) as well: 


set_false_path -from 
set_false_path -from 
set_false_path -from 
set_false_path -from 
set_false_path -from 
set_false_path -from .gpll~PLL_OUTPUT_COUNTER|divclk}] -to .gen_bonded_group.av_xcvr_native_inst|inst_av_pcs|ch.inst_av_pcs_ch|inst_av_hssi_8g_rx_pcs|wys|rcvdclkpma}]
set_false_path -from .gpll~PLL_OUTPUT_COUNTER|divclk}] -to .gen_bonded_group.av_xcvr_native_inst|inst_av_pcs|ch.inst_av_pcs_ch|inst_av_hssi_8g_tx_pcs|wys|txpmalocalclk}]

(Besides, they showed up without the 8b/10b interface, and there, the test ran fine....)

So Back to the original problem: What am I doing wrong?