Keypad Matrix And Direct Keys With One Rotary Encoder - Intel PXA27 Series Design Manual

Keypad Interface
18.5.2

Keypad Matrix and Direct Keys with One Rotary Encoder

This example discusses one of many possible configurations when interfacing to the PXA27x
processor keypad controller. This specific configuration shows the keypad controller interfaced to a
3 x 4 matrix keypad of 12 keys, 6 direct keys, and 1 rotary encoder.
18.5.2.1 Signals
The signal definitions do not change, just the signal usage. See
information.
II:18-8
Figure 18-3
®
Intel PXA27x Processor Family Design Guide
for detailed signal