From: Martin Mares <mj@ucw.cz>
Date: Fri, 14 Jul 2023 17:32:04 +0000 (+0200)
Subject: test-sinclair: Note on optocoupling and negation
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=ea02eb506efec6ce955d24902b490ec2b83d4f32;p=home-hw.git

test-sinclair: Note on optocoupling and negation
---

diff --git a/test-sinclair/README b/test-sinclair/README
index 80095ed..cc38070 100644
--- a/test-sinclair/README
+++ b/test-sinclair/README
@@ -24,9 +24,9 @@ BluePill LED		| PC13		 GND |
 			| PB0		PA11 |
 			| PB1		PA10 |  RXD1 - debugging console
 			| PB10		 PA9 |  TXD1 - debugging console
-			| PB11		 PA8 |  IR remote control
-			| RESET		PB15 |	MOSI2 - LED driver data input
+			| PB11		 PA8 |  IR remote control output (via optocoupler, negated)
+			| RESET		PB15 |	MOSI2 - LED driver data input (via optocoupler, negated)
 			| 3.3 V		PB14 |	MISO2 - unused
-			| GND		PB13 |	SCK2 - LED driver clock
+			| GND		PB13 |	SCK2 - LED driver clock (via optocoupler, negated)
 			| GND		PB12 |	SS2 - unused
 			+--------------------+