SW1 datasheet(6/20 Pages) 4DSYSTEMS

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microOLED Display Modules

uOLED-160G2

Page 6 of 20

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Joystick – Multi Switch:

Multiple buttons or a multi-switch Joystick can be

connected to the IO1 pin on the uOLED-160G2

module. Up to five buttons or a 5 position multi-switch

joystick connects to a junction of a resistor ladder

network that forms a voltage divider. The A/D

converter of the IO1 pin internally reads the analogue

value and decodes it accordingly. This feature is

supported by dedicated 4DGL library functions. The

following diagrams indicate how to connect up to five

individual buttons or a multi switch joystick to the IO1

pin.

Unused buttons do not need resistors to be connected

to the circuit. Table below lists the buttons and

corresponding resistor values.

Dallas 1-Wire

The Dallas 1-Wire protocol is a form of serial

communications designed to operate over a single

data line plus ground reference. Multiple 1 Wire

devices can be attached to the same shared data line

to network many devices. One wire device support is

available on both the IO1 and the IO2 pins on the

uOLED-160G2 module.

The following diagram depicts a typical 1-Wire

temperature sensor interface

Sound Output:

The uOLED-160G2 module is capable of generating

complex sounds and RTTL tunes from its IO1 and IO2

pins. A simple speaker circuit as shown below can be

utilised.

GPIO Functions and Features

Number of

Buttons

Button Number

Resistor

Value

SW1

22K

SW2

10K

SW3

4.7K

SW4

2.2K

SW5

1.2K

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