Picaxe 28 project board and SPI

Saotome

New Member
Hello!

I have a Picaxe 28 project board that I have, so far, mostly been using with simple sensors, servos and motors.
Now I'm looking to expanding my projects using i2c and SPI communication with other devices.

I happened to have a couple of Max7219's at home, so i bought a 8x8 LED matrix and thought I'd start with that.
I've wired the Max7219 to the LED matrix and now I want to connect the chip to the Picaxe MOSI, SS and CS pins.
The picaxe manual shows which legs on the chip itself are for SPI communication, but I cannot find which pins on the
project board those legs correspond to.

Any help is appreciated.
 

Saotome

New Member
Thanks, I have the AXE020 board.
I've been staring myself blind at the manual for ages trying to figure it out and now I suddenly realized the circuit board layout was
there the whole time :)
I've found the SCLK, MOSI and MISO pins but I'm still not finding the slave select or CS?
 

Technical

Technical Support
Staff member
slave select and chip select are not special pins, either tie them high/low as required by direct wiring to the power rails or connect them to any general purpose PICAXE output to control them via high/low commands
 
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