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Motorola MC68HC908AB32 - Contents; Introduction; Section 19. Keyboard Interrupt Module (KBI)

Motorola MC68HC908AB32
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MC68HC908AB32Rev. 1.0 Technical Data
MOTOROLA Keyboard Interrupt Module (KBI) 345
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.

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