Parlane
Posts: 4
Joined: Wed Jul 18, 2012 2:39 am

Can someone please supply schematics for the Alpha board?

Tue Jul 24, 2012 9:36 pm

I am after the Alpha board schematics, the one floating on the web is far too small to read the labels on.

I am most interested in which gpios the SD interface is connected to the SoC.

Thanks,
Matt

User avatar
DexOS
Posts: 876
Joined: Wed May 16, 2012 6:32 pm
Contact: Website

Re: Can someone please supply schematics for the Alpha board

Tue Jul 24, 2012 10:05 pm

I have read the SD pins, are shared with the ARM JTAG pins on the pi.
The ARM JTAG pins are indeed shared with the GPIO pins but accidentally (really an accident!!) they
are all shared with the SD-card pins. So you could make an ARM JTAG adopter which plugs in the SD-card slot. But you will have to debug without SD access.
As James said: You would use ARM JTAG only for kernel bring up and that should be do-able without SD-card access for most of the development. Until you have to bring up the SD-card ....
http://www.raspberrypi.org/phpBB3/viewt ... 199#p16199
Batteries not included, Some assembly required.

jamesh
Raspberry Pi Engineer & Forum Moderator
Raspberry Pi Engineer & Forum Moderator
Posts: 21649
Joined: Sat Jul 30, 2011 7:41 pm

Re: Can someone please supply schematics for the Alpha board

Tue Jul 24, 2012 10:10 pm

Parlane wrote:I am after the Alpha board schematics, the one floating on the web is far too small to read the labels on.

I am most interested in which gpios the SD interface is connected to the SoC.

Thanks,
Matt
Just out of interest, why are you using an alpha board? And where did it come from?
Principal Software Engineer at Raspberry Pi (Trading) Ltd.
Contrary to popular belief, humorous signatures are allowed. Here's an example...
"My grief counseller just died, luckily, he was so good, I didn't care."

Return to “Bare metal, Assembly language”