MC68HC908JG16 Datasheet, PDF (283/324 Pages) Motorola, Inc – Microcontrollers

Technical Data — MC68HC908JG16
Section 16. Keyboard Interrupt Module (KBI)
16.1 Contents
16.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
16.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
16.4 Pin Name Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284
16.5 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .285
16.6 Keyboard Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
16.7 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 287
16.7.1 Keyboard Status and Control Register. . . . . . . . . . . . . . . . 288
16.7.2 Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 289
16.8 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
16.8.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289
16.8.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .289
16.9 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 290
16.2 Introduction
The keyboard interrupt module (KBI) provides eight independently
maskable external interrupts which are accessible via PTA0–PTA7 pins.
MC68HC908JG16 — Rev. 1.1
Freescale Semiconductor
Keyboard Interrupt Module (KBI)
Technical Data
283