From 46607632aca04dc76198b58afe7c62a69a4a0d73 Mon Sep 17 00:00:00 2001 From: Francis Rowe Date: Sat, 05 Dec 2015 19:06:02 -0500 Subject: docs (html): backport 43438b995be890eed297b5721417ea789f2dc7f9 --- (limited to 'docs/install/bbb_setup.html') diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html index f3f93d5..8ff2d8e 100644 --- a/docs/install/bbb_setup.html +++ b/docs/install/bbb_setup.html @@ -17,8 +17,8 @@

How to program an SPI flash chip with the BeagleBone Black

This document exists as a guide for reading from or writing to an SPI flash chip with the BeagleBone Black, - using the flashrom software. - BeagleBone Black rev. C was used when creating this guide, but earlier revisions + using the flashrom software. + A BeagleBone Black, rev. C was used when creating this guide, but earlier revisions may also work.

Back to previous index

@@ -33,74 +33,64 @@

@@ -115,21 +105,19 @@

Setting up the 3.3V DC PSU

- ATX PSU pinouts are on wikipedia + ATX PSU pinouts can be read on this Wikipedia page.

- You can use pin 1 or 2 (orange wire) on a 20-pin or 24-pin ATX PSU for 3.3V, - and any of the ground/earth sources (black cables) for ground. - Short PS_ON# / Power on (green wire. pin 16 on 24-pin ATX PSU, or pin 14 on a 20-pin ATX PSU) to a ground - (black. there is one right next to it) using a wire/paperclip/jumper then - power on the PSU by grounding PS_ON# (this is also how an ATX motherboard turns on a PSU). + You can use pin 1 or 2 (orange wire) on a 20-pin or 24-pin ATX PSU for 3.3V, and any of the ground/earth sources (black cables) for ground. + Short PS_ON# / Power on (green wire; pin 16 on 24-pin ATX PSU, or pin 14 on a 20-pin ATX PSU) to a ground + (black; there is one right next to it) using a wire/paperclip/jumper, then power on the PSU by grounding PS_ON# + (this is also how an ATX motherboard turns on a PSU).

- DO **NOT** use pin 4, 6, do **NOT** use pin 19 or 20 (on a 20-pin ATX PSU), and - DO **NOT** use pin 21, 22 or 23 (on a 24-pin ATX PSU). Those wires (the red ones) are 5V, and they **WILL** - kill your flash chip. ***NEVER*** supply more than 3.3V to your flash chip. - (that is, if it's a 3.3V flash chip. 5V and 1.8V SPI flash chips do exist, but they are rare. always - check what voltage your chip takes. most take 3.3V) + DO **NOT** use pin 4, 6, do **NOT** use pin 19 or 20 (on a 20-pin ATX PSU), and DO **NOT** use pin + 21, 22 or 23 (on a 24-pin ATX PSU). Those wires (the red ones) are 5V, and they **WILL** kill your flash chip. + ***NEVER*** supply more than 3.3V to your flash chip (that is, if it's a 3.3V flash chip; 5V and 1.8V SPI + flash chips do exist, but they are rare. Always check what voltage your chip takes. Most of them take 3.3V).

You only need one 3.3V supply and one ground for the flash chip, after grounding PS_ON#. @@ -421,6 +409,7 @@ GND 4-5 MOSI

Copyright © 2014, 2015 Francis Rowe <info@gluglug.org.uk>
Copyright © 2015 Patrick "P. J." McDermott <pj@pehjota.net>
+ Copyright © 2015 Albin Söderqvist
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; -- cgit v0.9.1