MC68HC908AB32 Datasheet, PDF (345/392 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Technical Data — MC68HC908AB32
Section 19. Keyboard Interrupt Module (KBI)
19.1 Contents
19.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 345
19.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
19.4 I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
19.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347
19.5.1 Keyboard Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 349
19.5.2 Keyboard Status and Control Register. . . . . . . . . . . . . . . . 349
19.5.3 Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 351
19.6 Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
19.7 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 351
19.8 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 352
19.2 Introduction
The keyboard interrupt module (KBI) provides five independently
maskable external interrupts which are accessible via PTG0–PTG2 and
PTH0–PTH1 pins.
MC68HC908AB32 — Rev. 1.1
Freescale Semiconductor
Keyboard Interrupt Module (KBI)
Technical Data
345