I2C led Display



Example for the usage of a 4-digit alphanumeric led display with HT16k33 chip. It uses I2C to communicate.

The display address is 0x70. The segments are numbered as shown in the picture.



The state of a digit is stored in a 16-bit word with A being the lowest bit:

0 DP N M L K J H G2 G1 F E D C B A

e.g. 0x0100000011000000 lights up the decimal point and the two horizontal segments in the middle.

The display has 5 pins:

It has been tested with PIC18F45K50 pinguino kit

Version: 1.03 (9.10.2014)