User Manual

Pins A, B, C and D select which two rows of the display

are currently lit. (32x16 matrices don’t have a “D” pin —

it’s connected to ground instead.)

These connect to pins A0, A1, A2 and (if D pin present)

A3. This is the same for both the Arduino Uno and

Mega.

LAT Wire

For 32x32 and 64x32 matrices, LAT connects to

Arduino pin 10.

This is the same for all boards.

The LAT (latch) signal marks the end of a row of data.

OE Wire