I’m starting to design my first project and wanted to know
how many pins I could use for GPIO (both in and out).
(15-25,28) I want to use all 12 adc pins for analogue pot input.
(16,17,18,19) I want to use all 4 audio ins and outs.
(12,13) and I want to use 2 pins for a display I2C.
My daisy seeds wont arrive for a while, but I’m aware that usually these kind of MCU’s
usually have a few pins tied up with other hardware/functions .e.t.c.
My question is after I’ve used up the pins above - how many pins would be available for gpio in and out?
Looking at the board pin out
that leaves me with:
33,34,36,37,14,13,10,9,8,7,6,5,4,3,2,1 - 16 pins
I could those as charlieplexed ins and out ?
8 for input (8x7 = 56 CP’d switches)
8 for output (8x7 = 56 CP’d leds)