Small e-paper shield minimum pins

Greetings

I’ve got my shield and display, but I have a question about the number of pins required to operate it (specifically to write text to it, I’m not interested in images)

I’m guessing at the very least I’m going to want

M_VCC_5V
M_VCC_3V3
M_MOSI
M_SCK
M_MISO
M_/EPD_CS

What else? :question: