I am trying to design a miniature USB Audio board. So, obviously I cannot use the boot flash used on the eval kit due to size constraint.
I have looked through many documents but could not find detailed boot flash hardware requirement.
Specifically, the eval board used 133MHz NOR flash. However, I have some difficulty finding small physical size NOR flash at 133MHz. My question is can I use 108MHz NOR Flash? Is there any setting in the .xn file I can use to set the QPSI to a lower speed to accommodate the 108MHz QSPI NOR flash?
requirement of the boot flash
-
- Newbie
- Posts: 1
- Joined: Wed Sep 25, 2024 5:46 am
-
Verified
- XCore Legend
- Posts: 1085
- Joined: Thu Dec 10, 2009 9:20 pm
- Location: Bristol, UK
The default frequency for the second stage loader is only ~15MHz, with the initial boot loader running slower.
(Checkout the --quad-spi-clock option to xflash to speed it up/slow it down)
(Checkout the --quad-spi-clock option to xflash to speed it up/slow it down)
Technical Director @ XMOS. Opinions expressed are my own
-
- XCore Addict
- Posts: 131
- Joined: Fri Jul 05, 2013 5:55 pm
Why not XUF208 with included flash.?
-
Verified
- Experienced Member
- Posts: 68
- Joined: Sun Dec 13, 2009 1:12 am
If only being used for boot flash then no real speed requirement.
For small size, we use the following part:
https://www.digikey.com/en/products/det ... TR/5804003
Cheers,
Joe
For small size, we use the following part:
https://www.digikey.com/en/products/det ... TR/5804003
Cheers,
Joe
XMOS hardware grey beard.