E-paper display 1.54" (SSD1681)
1.54-inch e-paper module (SSD1681) · 200 × 200 · SPI · 3.3 V · draws about 5 mA for 2 s while it refreshes and nothing at all afterwards: the image stays with the power off, for years

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.
Pins
- VCC
- GND
- DIN
- CLK
- CS
- DC
- RST
- BUSY