SPI speed

[bexizuo]

Hi,

anybody knows what is maximum speed limitation on SPI on A13 ?

is there OLinuxino that supports up to 60MHz on SPI clk ?

Kind regards,

[vinifr]

20MHz: https://github.com/linux-sunxi/linux-sunxi/blob/sunxi-3.0/arch/arm/mach-sun5i/include/mach/spi.h#L230

[JohnS]

Odd - the comment says 20MHz but the constant is 80MHz.  Maybe an outdated comment.

Worth trying 60MHz, I guess.

Please post back whether it works or not.

John

[bexizuo]

JohnS, i don't have it now, but i'm looking for the device that supports at least 50MHz on SPI, but if you found out that the frequency is higher then i will order it, but now i have to finish some other things,

Thank You and vinifr for the reply,

Kind regards

[BJFreeman]

been digging, the A13 User Manual - v1.2 (2013-01-08).pdf @ http://dl.linux-sunxi.org/A13/  page 72 (SPI 0_SCLK_CFG_REG) says the max is 200mhz
drivers-sunxi\spi_bus