MC68HC908GP32 Datasheet, PDF (183/410 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Freescale Semiconductor, Inc.
Technical Data – MC68HC908GP32•MC68HC08GP32
Section 13. Keyboard Interrupt Module (KBI)
13.1 Contents
13.2 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181
13.3 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
13.4 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 182
13.5 Keyboard Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185
13.6 Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186
13.6.1 Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
13.6.2 Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 186
13.7 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . .186
13.8 I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
13.8.1 Keyboard Status and Control Register. . . . . . . . . . . . . . . . 187
13.8.2 Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 188
13.2 Introduction
The keyboard interrupt module (KBI) provides eight independently
maskable external interrupts which are accessible via PTA0–PTA7.
When a port pin is enabled for keyboard interrupt function, an internal
pullup device is also enabled on the pin.
MC68HC908GP32•MC68HC08GP32 — Rev. 6
MOTOROLA
Keyboard Interrupt Module (KBI)
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Technical Data
181