REQ: secondary serial port on P89C51RD2 (Phillips)

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ZeRoN

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p89c51rd2 baud rate setting

Dear all,

Does anyone have any idea to create 2nd. serial port
on P89C51RD2 at any baudrate?

Regards,
 

Hi ZeRoN,

What you are looking for, is a software UART. It's an application note on Philips web site wrote jun 1993 by Greg Goodhue. Read carefuly the limitations for maximum baud rate and very good explanation concerning to theory of operation.
**broken link removed**

Or this one:
How to Get a Second Asynchronous Interface on a 80C51
Microcontroller Family http://www.atmel.com/atmel/acrobat/doc3ab877f2ec329.pdf

Alternatively you can type bit-bang 8051 on google.

However, there are a lot of MCS51's derivative with second serial port, hardware implemented.

Silvio
 

I got them, Thankyou so much.
 

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