From 40cd14c29c22e0b2f334b1056cb1a625e72cfcd7 Mon Sep 17 00:00:00 2001 From: sys64738 Date: Tue, 1 Feb 2022 16:07:02 +0100 Subject: [PATCH] add hardware revision update notes --- hw-rev-update-notes.txt | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 hw-rev-update-notes.txt diff --git a/hw-rev-update-notes.txt b/hw-rev-update-notes.txt new file mode 100644 index 0000000..d900014 --- /dev/null +++ b/hw-rev-update-notes.txt @@ -0,0 +1,16 @@ +* DO NOT USE U300; BAD PIN POLARITY USED! (also true for <=rev3.1!!) + +* rev2.0->rev2.1 rework needed: + * connect U400.6 to U400.7 + * cut connection from U401.10 (to U500.1,R403; but cut close to U401) + * connect U400.5 to U401.10 + * connect U400.7 to U500.1 ('Vdclo') + * if U400 not used: connect U400.5 to U400.7 + +* to update rev2.0 -> rev3.x components: + * R1,2 -> R500,R405 (reuse component, new part assignment) + * new: R40{4,3,2}: 47k 0805 + * new: R401: 47k OR 0Ohm; 0805 + * new: R1,R2: 220k 0805 + * new: C401: OPTIONAL 10uF 0603 + * if >=rev3.2: D30{2,3,4,5} is now SOD-123F footprint, not SOD-323