Datasheet

This pin is part of the 1->16 or 1->8 multiplexing circuitry.

Pi GPIO #20 - Matrix D (address D) pin

This pin is part of the 1->32, 1->16 multiplexing circuitry. Used for 32-pixel and 64-pixel tall displays only

Pi GPIO #24 - Matrix E (address E) pin

This pin is part of the 1->32 multiplexing circuitry. Used for 64-pixel tall displays only. Present on newer “Rev C”

HATs only. Requires minor soldering, explained on next page.