MC68HC908JK1 Datasheet, PDF (165/210 Pages) Motorola, Inc – MC68HC908JK1

Technical Data — MC68H(R)C908JL3
Section 14. Keyboard Interrupt Module (KBI)
14.1 Contents
14.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
14.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165
14.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 166
14.4.1 Keyboard Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 168
14.4.2 Keyboard Status and Control Register. . . . . . . . . . . . . . . . 169
14.4.3 Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 170
14.5 Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
14.6 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
14.7 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 171
14.2 Introduction
The keyboard interrupt module (KBI) provides seven independently
maskable external interrupts which are accessible via PTA0–PTA6 pins.
14.3 Features
Features of the keyboard interrupt module include the following:
• Seven keyboard interrupt pins with separate keyboard interrupt
enable bits and one keyboard interrupt mask
• Software configurable pull-up device if input pin is configured as
input port bit
• Programmable edge-only or edge- and level- interrupt sensitivity
• Exit from low-power modes
MC68H(R)C908JL3 — Rev. 1.0
MOTOROLA
Keyboard Interrupt Module (KBI)
Technical Data
165