On Tue, Dec 23, 2008 at 10:40 PM, Peter Stuge <[email protected]> wrote: > I wonder how easy these are to order..
I did not post this because I felt it was like advertising, but here it is: http://www.dediprog.com/SPI-flash-accessories/SPI-Flash-Socket-8pin I have contacted with the company and I am told the MOQ is 10. Shipping fee is high except for Taiwan. > I know that 1 second would be ideal, but what would be good enough? > > 30s? 1min? 2min? 3min? > > And for which flash chip size? That is also important, because double > the size will double the time. :) 4Mbit vs. 16Mbit = 4x the time. Could the words, between parentheses after "not slow" in my original post, serve as a specification of that kind? I think what I meant in the original post is I do not want to wait for more than 3 mins for any chip. Of course that is not a proper spec. Since 8Mbit chips are widely used these days (is it?), my spec would be: 3 mins - 8Mbit. > Please do. The 2232 MPSSE mode's maximum SPI clock is 6MHz, but the > problem is with turnaround time between each sequence of bytes that > are read or written. ..., this need for status reads can slow the > process down quite a lot. I did not realize that. Let's see. > Another option is to download the data to be flashed "just in time" > so that no buffering is needed. But then the PC communication link > needs more care. I think that is easier than adding RAM however. After all, a (not so) fast GPIO peripheral interface, with a simple (stupid) protocol, solves the problem. The philosophy of PC decides we do not have things of that kind. Serial and parallel ports are simple, but they are a bit slow. USB is fast, but the protocol is complicated (for SPI programming application). > I'm looking forward to hearing more about this. When your programmer > is finished we should look closer at how to make plugins for > flashrom. Sure. I am looking forward to coding again. yu ning -- coreboot mailing list: [email protected] http://www.coreboot.org/mailman/listinfo/coreboot
