P4080DS UART No Output

[yyurtcan]

Hi,

I have board based on p4080ds. When I power on board, there is no output from uart. I checked duart registers and I found that BI status is interrupted in the ULSR1 register and RXRDY status is not ready in the UDSR1 register.  I could not find what are the reasons for that?

Best regards.

[alexander_yakov]

BI means break condition - Rx line was held in logic "zero" for more than character time.

The reason, why RXRDY is cleared is specified in Table 17-106 "UDSR[RXRDY] Cleared Conditions" of P4080 Reference Manual.

P4080 Reference Manual (P4080RM) is available from P4080 product page, "Documentation" tab:

QorIQ® P4080|NXP 

Have a great day,
Alexander
TIC

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