SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The keyboard controller detects and decodes multikey combinations using the following rules:
Figure 30-3 shows an example of multikey limitation.
When using the keyboard controller with a smaller keypad (for example, 5 × 5), unused rows must be tied high to prevent disturbing the scanning process. Normally, all rows must be pulled up internally at the I/O cells of the device.