ST7 Maximum Baud Rate ?

nirn · ‎2003-11-06

Posted on November 06, 2003 at 13:45

nirn · ‎2003-11-04

Posted on November 05, 2003 at 04:42

Hi,

I'm looking for a ST7 chip with the maximum Baud rate (SCI) For RS232 communication - So far I saw only 500k - does any one know on any other chip with faster UART ?

Thanks

itsmejatinus · ‎2003-11-05

Posted on November 06, 2003 at 04:30

What i know is Maximum baud rate possible is 38.4 Kbps. Where have you found 500k?

nirn · ‎2003-11-05

Posted on November 06, 2003 at 05:43

Well....I'm working with the ST72321 and according to the Data Sheet you can reach 500k baud rate in the SCI.

sjo · ‎2003-11-05

Posted on November 06, 2003 at 05:47

500k is available will the following config @ 8MHz cpu:

TR & RR=1, PR=1

Regards

sjo

shermantec · ‎2003-11-06

Posted on November 06, 2003 at 12:16

Hello

Can i get 1M or even more ?

Latino

sjo · ‎2003-11-06

Posted on November 06, 2003 at 12:17

I'm afraid as per the datasheet - 500k max for the sci

Regards

sjo

nirn · ‎2003-11-06

Posted on November 06, 2003 at 12:23

I've checked - According to the Data Sheet in my hands - using 16MHz osc can give you SCI with a 1M maximum.

Take a look on the Formula:

Fcpu

Tx = ------

16 * ETPR*(PR*TR)

Fcpu

Rx =--------

16 * ERPR*(PR*RR)

So if ERPR=PR=RR = 1 and Fcpu=16Mhz => you can get 1M Baud Rate !!!!

BUT !!! I've checked and tried it --- and you can't !!!! the Max is 500K

[ This message was edited by: TeaMaker on 06-11-2003 16:54 ]

sjo · ‎2003-11-06

Posted on November 06, 2003 at 13:45

Remember the maximum fcpu for the st7 is 8MHz not 16MHz.

Regards

sjo