[U-Boot-Users] why is USB so slow
laurent.mohin at acterna.com
Tue Jan 13 08:33:04 CET 2004
I want to submit a question about USB performance.
I'm designing a board with a 405GPr and an Intel PIIX4E Southbridge.
For upgrade purpose, I'm dowloading linux and initrd image which size is
about 9M bytes.
With a compact flash on the IDE bus, I issued the command :
fatload ide 2:0 800000 pMulti
and had the file downloaded in 10 seconds
With a memory key on the USB bus, I sent the command :
fatload usb 0:0 800000 pMulti
and had the file downloaded in 150 seconds
Has somebody else noticed this behaviour? What is the explanation?
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