Datasheet

The FeatherWing eInk Display and eInk Feather Friend are a little more compact but have just about the same pins as

the breakout

SPI MOSI/MISO/SCK are on the FeatherWing SPI connection pads

SD CS, SRAM CS, EINK CS and DC are in order after the two I2C pins. The numbers of the pins these correspond to

will differ from board to board. However, on 32u4/328p/M0/M4/nRF52840 and many other boards you will see the

following connections

SD CS to Pin D5