MC68HC08AB16A Datasheet, PDF (337/380 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
Technical Data — MC68HC08AB16A
Section 19. Keyboard Interrupt Module (KBI)
19.1 Contents
19.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
19.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
19.4 I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
19.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
19.5.1 Keyboard Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
19.5.2 Keyboard Status and Control Register. . . . . . . . . . . . . . . . 341
19.5.3 Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 343
19.6 Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
19.7 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 343
19.8 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 344
19.2 Introduction
The keyboard interrupt module (KBI) provides five independently
maskable external interrupts which are accessible via PTG0–PTG2 and
PTH0–PTH1 pins.
MC68HC08AB16A — Rev. 2.0
MOTOROLA
Keyboard Interrupt Module (KBI)
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Technical Data
337