5 keypad – Matrix Orbital LK162A-4T User Manual
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LED Indicators
The LK162A-4T has 6 General Purpose Outputs which control 3 bi-colour LEDs. Red, green, and orange-
yellow colours can be created using these software controlled GPOs. Odd numbered GPOs control red
while even numbers switch the green aspects of the LEDs, as shown in the table below.
Table 11: LED Output
Colour GPO
O
GPO
E
Yellow
0
0
Green
0
1
Red
1
0
Off
1
1
4.4 Set LED
Indicators
Dec
Hex
ASCII
254 90
FE 5A
■ Z
Number Colour
Number Colour
Number Colour
v8.0
Immediately sets the state of the specified LED indicator to a specific colour. Temporary unless remember is on.
Number
Byte
LED indicator to be controlled.
Colour
Byte
LED colour state as below.
Table 12: LED Indicator Colour
State
Colour
Off
0
Green
1
Red
2
Yellow
3
6.5 Keypad
5.1 Auto Transmit
Key Presses On
Dec
Hex
ASCII
254 65
FE 41
■ A
v7.2
Key presses are automatically sent to the host when received by the display. Default is Auto Transmit on.
5.2 Auto Transmit
Key Presses Off
Dec
Hex
ASCII
254 79
FE 4F
■ O
v7.2
Key presses are held in the 10 key buffer to be polled by the host using the Poll Key Press command. Use this
mode for I2C transactions. Default is Auto Transmit on.