Eddy DK Programmer Guide
32
2.4.2.6.
SW1~SW16: Key Pad
Key Pad of DK board are consisted with the 4x4 matrix. GPIOs are set to Input mode to read the Key value. and Key
2, 4, 6, 8 also have the ▲(UP), ▼(DN), ◀(LEFT), ▶(RIGHT) direction function for LCD menu.
P10-P17
4x4 Key matrix
I/O
PB20
First Row line
IN
PB21
Second Row line
IN
PB30
Third Row line
IN
PB31
Forth Row line
IN
PC20
First Column line from left
IN
PC21
Second Column line from left
IN
PC22
Third Column line from left
IN
PC23
Fourth Column line from left
IN
2.4.2.7.
SW17: Power
In order to power up, pull up this switch.
2.4.2.8.
Reset1: Reset
Pin name
Function
Discription
I/O
PC16
nRESET
Polling Input signal continually from External Reset
key, implement as below with checking the constant
time of "Low."
Less than 5 seconds: General reset function.
More than 5 seconds: Factory Default function.
IN
