Instructions Circuit Diagram

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14.2. YETI Display kit YT-DSP2
General overview
The additional display module provides four 8-segment symbol dis-
plays. The display module also contains a 24-pin I2C driver chip for
symbol display control.
The YETI microcontroller controls the I2C driver chip. I2C is a standard
communication protocol between electronic components, using only
two signal wires SCL (serial clock) and SDA (serial data). We will need
justonepairofatotalof20wiresprovidedbytheatcable.
The digits allow us to display a number of messages or values. The
simple basic principle of the I2C chip allows us to create and display a
number of new symbols.
Hardware description
The display system provides four 8-segment displays, an I2C display
chip and a few supplementary components.
Using the I2C-signals the chip communicates with a control unit, which
will normally be a microcontroller. I2C is a standard communication
protocol between electronic components, using only two signal wires.
The chip will take care of all control signals for the displays and the
usermerelyneedstodenewhichsymbolneedstobedisplayedat
each of the display positions. Control signals of course will use the I2C-
bus system.
Display intensity can be controlled in 8 levels.
Each display provides 8
signal lines for control,
1 control line for each
segment. Seven data-lines
control the 7 segments
and one line controls the
decimal dot.
The 7 segments and
the dot each contain a
Light Emitting Diode (LED).