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README: clean up layout

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q3k 2023-10-11 17:21:09 +02:00
parent 18f1bfd64d
commit 52eee6a569
1 changed files with 5 additions and 1 deletions
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README.md
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@ -16,6 +16,8 @@ Schematic of 2.0: https://reprap.org/mediawiki/images/7/7d/Melzi-circuit.png
EXP connector: EXP connector:
---- ----
On the mainboard:
PC1 | 1 2 | PA1 PC1 | 1 2 | PA1
PC0 | 3 4 | PA2 PC0 | 3 4 | PA2
PD3 | 5 6 | PA3 PD3 | 5 6 | PA3
@ -23,7 +25,7 @@ EXP connector:
VCC | 9 10 | GND VCC | 9 10 | GND
LCD board LCD board
=== ---
| EXP Pin | AVR Pin | AVR Function | Screen board function | | EXP Pin | AVR Pin | AVR Function | Screen board function |
|---------|---------|--------------|-----------------------| |---------|---------|--------------|-----------------------|
@ -39,6 +41,8 @@ LCD board
Button Matrix Button Matrix
--- ---
On the LCD board.
Based on a voltage divider between button(s) pressed and a constant pull-up to VCC. Based on a voltage divider between button(s) pressed and a constant pull-up to VCC.
Resistor to VCC: 4.7k Resistor to VCC: 4.7k