Hello,
We are using the SJA1110 in a project.
Unfortunately, the design was implemented before the SJA1110 errata sheet was published. We disregard the PowerUp sequencing, in our case the VDD11 is booted with the VDD33.
Erata point ES_SJA1110: 100BASE-TX power-up sequence
Contrary to the assertion in section 12.3 of the data sheet that no special sequencing is
needed during supply ramp-up, the SJA1110 must follow a defined power-up sequence
when the 100BASE-TX port is used.
If VDDA33_100BTX is switched on before VDD11_CORE, the performance of the
100BASE-TX port may be degraded (higher BER).
Can you specify the effect on the 100Base-TX interface in more detail?
Functional restriction of the interface, ....
Best regards and thank you
Albrecht
