C5505 allowable receive baud rate error

AndMan

Hello, is there any data related to the allowable error on the receive baud rate for the C5505's UART? We have the C5505 running at 2.048 Mbaud, and the device it is communicating with is 2 Mbaud.

I did notice datasheet table 5-31 "Timing Requirements for UART Receive", however these values seem very restrictive (bit width +3/-3.5 ns); especially restrictive for low baud rates. Is it possible the units on this table were supposed to be "%" instead of "ns"?

Thanks - AM

over 11 years ago

0 Vasantha K over 11 years ago

TI__Genius 12575 points

Hi,

Regarding units refered in the datasheet, These data ( -3.5/+3ns) are based on the characterization for the supported baud rates, and do not have the % values instead of ns.

Regards

Vasanth

0 Bill Finger over 11 years ago

Genius 3735 points

AndMan,

A good error margin is +/-2%. A good analysis is here:

http://pdfserv.maximintegrated.com/en/an/AN2141.pdf

Bear in mind that both ends of your link may have error.

Regards,

Bill

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C5505 allowable receive baud rate error