Communicate with Basic Stamp at 38400 Baud!

electrosys

Hello,
Here I have find a IC, that can communicates with a microctroller like BS2·at 38400 Baud rates! The IC is RSB6505, and has a typical communicates rate with host of 38400, 19200, 9600 or 4800 baud,·IC·buffers up to 64 bytes of·RS232 serial data.

For those who don't know the RSB6505, here is·data sheet of RSB6505, there is schema of Basic Stamp to RSB6505 and some code too.




Post Edited (electrosys) : 4/11/2010 6:56:23 PM GMT

Mike Green

Yes, Protean Logic has been making serial buffers for quite a few years and the RSB6505 is their latest. The BS2 can communicate with it at Bauds up to 9600 and the RSB6505 can communicate to the outside world at higher speeds. The BS2 can transmit at 19200, but really can't transmit at 38400 Baud. Other Stamp models like the BS2px can transmit faster. Remember that the BS2 is marginal at 9600 Baud for receiving. Some SERIN statements will work and some will not work reliably. The formatters like DEC are the most problematic because of their setup time.

electrosys

Hello Mike,

Something that I can't understand is the connection of MAX232A and D9, here the pin14 of MAX232A which is RS232 output, is connect to D9 pin3=TX
and pin13 of MAX232A which is RS232 input, is connect to D9 pin2=RX ! Shouldn't it changes the places of D9 pin3 to D9 pin2 ?

Look at the above post: imag attachment or RSB6505.pdf data sheet.

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