13 Jan
2004
13 Jan
'04
9:09 p.m.
In message 20415.216.110.51.8.1074021611.squirrel@www.orkun.us you wrote:
Well, there is no end to it. In my previous job, hardware engineer decided to use 64bit bus for flash so we had 4 of them to make 64bit bus(MPC755). So, the 32 bit ones is not enough to compare all 4 anyway.
It is. You can read 64 bits in two chunks of 32 bits each. There is actually little chance that the upper and the lower half of your bus will use different flash chips.
Another perfectly valid (but unusual) scheme is to map 4 devices each in byte mode. That 4 byte ID read would be different that the stored one if you wanted to compare them bus wide.
No problem. I think there are boards doing exactly this.
Best regards,
Wolfgang Denk
--
See us @ Embedded World, Nuremberg, Feb 17 - 19, Hall 12.0 Booth 440
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd@denx.de
As usual, this being a 1.3.x release, I haven't even compiled this
kernel yet. So if it works, you should be doubly impressed.
- Linus Torvalds in 199506181536.SAA10638@keos.cs.Helsinki.FI