Tool/software:
Hi
We have an issue with DAC TX Serdes Fifo errors. The JESD link is normaly up and running, no eye issues either on the TX or RX link ( Eye margin 1900). However, if we have a broken link downstream ( not the jesd link, i can not elaborate more here), the jesd links recovers in about 90% of the cases. In the rest of the cases, we get a DAC TX serdes fifo error, strangely the link seems to have recovered anyway but the error stays, even when clearing with the cafe library. (which clears register 128h, all alarms).
We clear with following functions of the cafe library:
tx-alarm:
- getJesdTxFifoErrors
- getJesdTxFifoErrors
- clearJesdTxAlarms
rx-alarm:
- getJesdRxLinkStatus
- getJesdRxAlarms
- clearJesdRxAlarms
The register map mentions in the case of serdes tx fifo errors (register: 119h and clearing register: 101h), a ti application note.
Can you please provide us this application note and tell us how to clear the serdes-fifo error.
