CharLCD PMOD
Description
This PMOD interfaces a HD44780-compatible 5V character LCD module via two PMOD connectors. This design connects all 8 data signal lines, and allows to run the LCD in both 4-bit and 8-bit mode.
Function
The build-in power booster/level converter translates 3.3V PMOD power and signal levels to 5V. Its physical size matches LCD modules such as the Sunlike HUOB-XA-G-G. The resistor RV1 controls the contrast.
Schematic
PCB Gerber
Module Pin Assignments
2x Type 1A connectors:
| Pin | Label | Description | Pin | Label | Description |
|---|---|---|---|---|---|
| 1 | d[7] | LCD Data-7 | 1 | en | LCD EN Signal |
| 2 | d[5] | LCD Data-5 | 2 | rs | LCD RS Signal |
| 3 | d[3] | LCD Data-3 | 3 | - | Not connected |
| 4 | d[1] | LCD Data-1 | 4 | - | Not connected |
| 7 | d[6] | LCD Data-6 | 7 | rw | LCD RW Signal |
| 8 | d[4] | LCD Data-4 | 8 | - | Not connected |
| 9 | d[2] | LCD Data-2 | 9 | - | Not connected |
| 10 | d[0] | LCD Data-0 | 10 | - | Not connected |
iCEBreaker FPGA
