Speed of using LPC to write USB disk

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Speed of using LPC to write USB disk

820 次查看
canheting
Contributor I

Hi!

In my project, I need to export data to USB disk with the FatFs file system on lpc1788 platform. The real speed I tested was 400KB/s~450KB/s. 

Official documents show that the USB speed can reach 12Mb/s(1.5MB/s).

The USB device controller on the LPC178x/177x enables full-speed (12 Mb/s) data
exchange with a USB host controller.

Therefore, my question is, what is the maximum speed that lpc1788 can export data to USB disk, and how can I improve the speed?

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811 次查看
xiangjun_rong
NXP TechSupport
NXP TechSupport

Hi, Geng,

I think the Flash erasing/programing dominate the usb disk speed rather than the USB transfer speed.

BR

XiangJun Rong

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