SPI Baud Rate Settings

[rayhall]

In the MC9S12XEP100RMV1.pdf data sheet it gives the formula to calculate the baud rate for SPI.

This is...

BaudRateDivisor = (SPPR + 1) * 2(SPR + 1)

Baud Rate = BusClock / BaudRateDivisor

You have to lookup a table to find the SPPR and SPR values. This table is based on a bus of 25 Mhz.

I am using 24 Mhz bus. Where do I find a table for this speed ?

Ray.

[iggi · Accepted solution]

Use the excel sheet attached. Baud rate changes according to the value of the bus clock.

Regards,

Ivan

[rayhall]

Thank you Ivan,

Ray.