Hardware/Parallelport/heb lcd

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LCD, buttons and LED boards

The HEB LCD board contains 4 Buttons and 8 LEDs. The LCD part is not functional on the V1.0 boards.

Version Photo Schematics Stock Description
V2.0 HEB LCD
boards 10-18
FPGA HEB LCD Schematic PDF 9 fully mounted Parallelboard extention with 4 Buttons, 8 Leds and an 4 Row LCD
V1.0 HEB LCD FPGA HEB Matrix Schematic PDF 9 fully mounted Parallelboard extention with 4 Buttons, 8 Leds and an optional LCD, however the LCD never worked and therefore no card with LCD exists.

Connectors

Version 1 and version 2 HEB-LCD boards are NOT pin compatible.

conn.
pin
V2
signal
V1
signal
FPGA-EBS
pin
conn.
pin
V2
signal
V1
signal
FPGA-EBS
pin
1 LCD CS_n LED 8 A11 2 LCD RST_n A13
3 LCD A0 LED 7 A14 4 LCD SCL D7
5 LCD SI LED 6 C7 6 LED 1 E9
7 LED 2 LED 5 A8 8 LED 3 F11
9 LED 4 LED 4 B11 GND power
supply
11 LED 5 LED 3 B13 GND
13 LED 6 LED 2 B14 GND
15 LED 7 LED 1 E7 GND
17 LED 8 button 4 E8 GND
19 button 1 button 3 G9 GND
21 button 2 button 2 F9 GND
23 button 3 button 1 F7 GND
25 button 4 F8 3.3 V

IP core

The LCD IP core allows to write text on the LCD. The core initializes the LCD and draws up to 22 per line based on a pattern defined in a ROM.

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