Max Herman

What is the max SPI clock imx28 can handle in slave mode?

Discussion created by Max Herman on Nov 3, 2011
Latest reply on Jun 12, 2014 by yongki min

Hello, I'm trying to make imx28 work at 20Mhz in slave mode.

 

I modified the mxs_spi driver, so it works in slave mode. And, it seems to work well at 4-10 Mhz, But when I'm trying to send the data at 12.5Mhz, SPI receives nothing, It doesn't even generate interrupts. 

 

I'm having a hard time figuring out what is the max SPI clock imx28's spi peripheral could handle in a slave mode. According to the datasheet, it could handle up to 50us min clock phase => 20Mhz total. 

 

Any suggestions?

 

Thanks!

Outcomes