Matrix Orbital PK162-12 - Manual (Page 20)

3.4.12 Cursor Right (254 77)
Moves the cursor one position to the right but does not erase any character that may be in that position.
Note that this command moves the text insertion point even if the cursor is turned off.
4 Keypad Interface
This chapter describes the keypad interface and associated commands in detail.
4.1 General
The display keypad interface processes the keypad row / column matrix into a serial (RS-232 or I 2 C)
data byte stream. Aside from this processing, the keypad has no effect on the display. To send keystrokes
to the display, they must be routed through the controller. Whenever a columns and a row pin are shorted
together, a keystroke will be generated and either held in the buffer (I 2 C) or send over the serial line to the
host (RS-232). The keypad shares the same pins as the seven GPOs on the display and only one or the other
can be used at one time.
4.2 Connections
Figure 19: Keypad Connector
The connector is not ’keyed’ so the keypad will probably plug in either of two ways. The display will not
be damaged by reversing the connector, but the keypad will generate a different ASCII character mapping
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