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author | Francis Rowe <info@gluglug.org.uk> | 2015-05-11 07:59:18 (EDT) |
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committer | Francis Rowe <info@gluglug.org.uk> | 2015-05-11 07:59:18 (EDT) |
commit | 0751832f55922bc9a463997b121713dbed907b36 (patch) | |
tree | 8f50e7e278cd4a4dc333ddcfd02b55458c273874 /docs/install/bbb_setup.html | |
parent | c3ed03fffee2327c2f80762a8b019989237e75aa (diff) | |
download | libreboot-0751832f55922bc9a463997b121713dbed907b36.zip libreboot-0751832f55922bc9a463997b121713dbed907b36.tar.gz libreboot-0751832f55922bc9a463997b121713dbed907b36.tar.bz2 |
docs/install/bbb_setup.html: Add info about wp/hold and pinouts
Diffstat (limited to 'docs/install/bbb_setup.html')
-rw-r--r-- | docs/install/bbb_setup.html | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/docs/install/bbb_setup.html b/docs/install/bbb_setup.html index 0c51251..d1a4e3d 100644 --- a/docs/install/bbb_setup.html +++ b/docs/install/bbb_setup.html @@ -297,6 +297,21 @@ Note: flashrom can never write if the flash chip isn't found automatically. 18 - - 3.3V PSU RED 22 - - NC - this is pin 1 on the flash chip <i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i> + +You may also need to connect pins 1 and 9 (tie to 3.3V supply). These are HOLD# and WP#. +On some systems they are held high, if the flash chip is attached to the board. +If you're flashing a chip that isn't connected to a board, you'll almost certainly +have to connect them. + +SOIC16 pinout (more info available online, or in the datasheet for your flash chip): +HOLD 1-16 SCK +VDD 2-15 MOSI +N/C 3-14 N/C +N/C 4-13 N/C +N/C 5-12 N/C +N/C 6-11 N/C +SS 7-10 GND +MISO 8-9 WP </pre> <p> The following shows how to connect clip to the BBB (on the P9 header), for SOIC-8 (clip: Pomona 5250): @@ -307,6 +322,17 @@ Note: flashrom can never write if the flash chip isn't found automatically. NC - - 21 3.3V PSU RED - - 17 - this is pin 1 on the flash chip <i>This is how you will connect. Numbers refer to pin numbers on the BBB, on the plugs near the DC jack.</i> + +You may also need to connect pins 3 and 7 (tie to 3.3V supply). These are HOLD# and WP#. +On some systems they are held high, if the flash chip is attached to the board. +If you're flashing a chip that isn't connected to a board, you'll almost certainly +have to connect them. + +SOIC8 pinout (more info available online, or in the datasheet for your flash chip): +SS 1-8 VDD +MISO 2-7 HOLD +WP 3-6 SCK +GND 4-5 MOSI </pre> <p> <b>NC = no connection</b> |