seanshpark
commented
5 months ago Pin configuration from other products
| LCD | Name | MCP23017 |
|---|---|---|
| 01 | GND | GND |
| 02 | VCC | +5V |
| 03 | V0 | (contrast trimm resister, 10K$\ohm$) |
| 04 | D/I | PA7 (0=Cmd, 1=Data) |
| 05 | R/W | PA6 (0=Write, 1=Read) |
| 06 | E | PA5 |
| 07 | DB0 | PB0 |
| 08 | DB1 | PB1 |
| 09 | DB2 | PB2 |
| 10 | DB3 | PB3 |
| 11 | DB4 | PB4 |
| 12 | DB5 | PB5 |
| 13 | DB6 | PB6 |
| 14 | DB7 | PB7 |
| 15 | PSB | PA4 |
| 16 | NC | - |
| 17 | RST | PA2 |
| 18 | VEE | - |
| 19 | LED-A | PA1 controlled NPN TR |
| 20 | LED-K | GND |
LCD 128x64 dot matrix