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Old 22 August 2014, 13:18   #13
alexh
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Join Date: Jan 2004
Location: Oxford
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Looking forward to it.

Quote:
Originally Posted by Mathesar View Post
The SPI-mod must be done however to use the 16MHz SPI mode. Without the SPI-mod done you can't go faster than 4MHz.
Where can I read about the 16MHz SPI change?

Is it this ?

Quote:
Originally Posted by jaqube
Bypassing R51 is necessary to get the SPI clock running at 24 MHz (SD and SDHC cards) or 16 MHz (MMC) instead of nominal 8 MHz. It speeds up hardfile transfer rate by about 20% (380 KB/s w/o and 460 KB/s w/ the mod and the CPU in turbo mode - w/o the mod and running the CPU @ 7 MHz the transfer speed is 240 KB/s). The easiest way is to short pads of resistors R50-R51

Last edited by alexh; 22 August 2014 at 13:23.
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