[OpenWrt-Devel] [PATCH v2 1/2] ramips: second spi device on rt5350
Álvaro Fernández Rojas
noltari at gmail.com
Tue Aug 19 15:48:09 EDT 2014
El 19/08/2014 21:43, jonsmirl at gmail.com escribió:
> How is the clock speed wrong?
The lowest speed the RT5350 SPI controller can achieve is System Clock / 128.
System Clock = 120MHz
Lowest SPI Clock = 120MHz / 128 = 937.5KHz
However, the MMC/SD cards need to be initialized at 100-400KHz.
openwrt-devel mailing list
openwrt-devel at lists.openwrt.org
More information about the openwrt-devel