Matrix Orbital PK202-24-USB - Manual (Page 19)

2.6.12 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.
3 Keypad Interface
This chapter describes the keypad interface and associated commands in detail.
3.1 General
The display keypad interface processes the keypad row / column matrix into a serial 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.
3.2 Connections
Figure 13: 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. However, the keypad will generate a different ASCII character
mapping for each position. If the connector has fewer than 10 pins it should be centered on pins 6 and 7 of
the connector.
Pins 1 through 6 are columns and Pins 7 through 10 are rows. The keypad is scanned wherever a key is
passed; there is no continuous key scan. This means that keypresses are dealt with immediately without any
appreciable latency. This also prevents electrical noise which is often caused by continuous key scans.
NOTE Please note that keypads may be laid out in a different pattern. If this is the case,
the user will need to interpret the key codes differently.
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