Datasheet

Shield Pinouts

The 2.7" EInk Shield is a little special in that the pins are fixed, so we'll document that here.

Power Pins

5V - this pin on the Arduino is used to generate the 3V logic level for the EInk chip, level shifter and boost

converter.

GND - connected for power and logic reference

IORef - this pin is connected to the level shifter and pullups. On modern Arduino boards it is connected to the

logic level of the board (3V or 5V)

Data Pins

SCK, MISO, MOSI - The 3 SPI logic pins are connected through the 2x3 socket header which is compatible with

any Arduino board. If you have an Arduino board without the 2x3 headers, you can cut the jumpers and connect

the solder jumper traces to D13, D12 and D11 respectively.

ECS (EInk Chip Select) - this is connected to D10

DC (EInk Data/Command) - this is connected to D9

SCS (SRAM Chip Select) - this is connected to D8

SDCS (SD Card Chip Select) - this is connected to D5

The BUSY pin is not used on the 2.7" display (it doesn't do anything anyways)

The RESET pin is connected to the microcontroller reset pin, but is available on a pad labeled EReset if you want to

toggle it yourself!

Buttons

The 4 buttons on the front are connected through a resistor divider to A3 you can use this function to determine what

button was pressed: