DIO

The SPI_DIO board

This is the documentation page for the SPI_DIO board.

Overview

This board enables you to read and write upto 7 digital IO lines.

Assembly instructions

None: the board comes fully assembled.

Pinout

pin	function
1	GND
2	VCC
3	IO0
4	IO1
5	IO2
6	IO3
7	d.n.c.
8	IO4
9	IO5
10	IO6

LEDs

The only LED is a power indicator.

jumper settings

See solder jumpers on how to change the solder jumper.

By changing the solder jumper SJ1, you can make the connector SPI1 (nearest the board edge) into an ICSP programming connector for the attiny44 on the board.

Protocol

The general overview of the SPI protocol is here.

The board specific protocol can be found here: DIO_protocol
You should also read the General_SPI_protocol notes.

For arduino, a sample PDE is available, called ardemo_lcd.pde, also at BitWizard software download directory .

This is a demo to send things using SPI to the lcd board. The SPI routines there are applicable for the 3fets and 7fets boards as well.

Changelog

1.0

• Initial public release