Modes Of Operation Overview; Keypad Matrix And Direct Keys And No Rotary Encoder - Intel PXA27 Series Design Manual

Keypad Interface
18.5

Modes of Operation Overview

The following subsections are examples showing how to use the keypad controller with either one,
two or no rotary encoders. Some example have different size matrix keypads.
18.5.1

Keypad Matrix and Direct Keys and No 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
4 x 4 matrix keypad of 16 keys, 8 direct keys with no rotary encoder.
18.5.1.1 Signals
The signal definitions do not change, just the signal usage. See
information.
II:18-6
Figure 18-2
®
Intel PXA27x Processor Family Design Guide
for detailed signal