From 9ff17ff5817187ad4209375c122a1888516b40fc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?King=20K=C3=A9vin?= <kingkevin@cuvoodoo.info>
Date: Tue, 2 May 2017 17:20:38 +0200
Subject: [PATCH] document multiplexer

---
 README.md | 21 ++++++++++++++++++---
 1 file changed, 18 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index c7b255c..47a8fe5 100644
--- a/README.md
+++ b/README.md
@@ -62,11 +62,26 @@ Connect the peripherals the following way (peripheral signal; peripheral signal;
   - CLK; 13; PB13; SPI2_CLK;
   - DIN; 1; PB15; SPI2_MOSI;
   - LOAD; 12; PB12; SPI2_NSS; used as GPIO
-- 7x TM1627 (with multiplexed clock line) to show the recording numbers
+- 7x TM1637 to show the recording numbers
   - VDD; 16; ; +5V;
   - GND; 1; ; GND;
-  - CLK; 18; PB6; GPIO
-  - DIO; 17; PB7; GPIO
+  - DIO; 17; PB7; GPIO;
+  - CLK; 18; 3-9; I0-I6; on analog multiplexed
+- 1x CD74HC4067 16-channel multiplexer
+  - VCC; 24; ; +5V;
+  - GND; 12; ; GND;
+  - common input; 1; PB6; GPIO; clock for TM1637
+  - #E; 15; PB9; GPIO; to enable on low
+  - S0; 10; PB3; GPIO; to select output
+  - S1; 11; PB4; GPIO; to select output
+  - S2; 14; PB5; GPIO; to select output
+  - I0; 9; 18; CLK; TM1637 for 
+  - I1; 8; 18; CLK; TM1637 for 
+  - I2; 7; 18; CLK; TM1637 for 
+  - I3; 6; 18; CLK; TM1637 for 
+  - I4; 5; 18; CLK; TM1637 for 
+  - I5; 4; 18; CLK; TM1637 for 
+  - I6; 3; 18; CLK; TM1637 for 
 - 1x tilt sensor
   - VCC/GNG; ; ; +3.3V;
   - OUT; ; PA10; WKUP; pulled low, wake up on rising edge