ParityBit(ODD) bugs in am3352 chip?

user3327072

< Chip Mark >
AM3352BZCZD60
4BC8L2W GI
962B ZCZ

Measuring the output signal(TXD1(ZCZ BallNumber ; D15) of the UART1 with oscilloscope.
UART Register set: Media=RS232, Parity=ODD, DataBit=8, StopBit=1, FlowControl=No, 115200Bps

Send : Simple Data 1Byte (0x80)
The error(Picture below) occurs intermittently.

The error occurs only ODD setup. (even/mark/space/none : OK)

There is no errata report.

over 10 years ago

0 Biser Gatchev-XID over 10 years ago

TI__Guru**** 393215 points

Such behavior has not been observed on AM335X. What software are you using?

0 user3327072 over 10 years ago in reply to Biser Gatchev-XID

Prodigy 20 points

I use a NucleusRTOS.
ParityBitSet "None,Even,Mark,Space" is operated normally.
ParityBitSet "ODD" the only unusual behavior.

At any rate not an error.
An error is generated in the 19200bps~115200bps. ( It is normally from 1200bps to 9600bps, and 250000bps )

0 Biser Gatchev-XID over 10 years ago in reply to user3327072

TI__Guru**** 393215 points

We do not support Nucleus RTOS on this forum. This is a third-party software, which is not supported by TI. I can confirm that the AM335X processor does not have hardware errata relating to your issue.

0 Biser Gatchev-XID over 10 years ago in reply to Biser Gatchev-XID

TI__Guru**** 393215 points

Checking further, Errata Advisory 1.0.35 may be related to your problem, but we have no way to check if this has been implemented correctly in Nucleus.

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ParityBit(ODD) bugs in am3352 chip?