mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 321

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

21.1 Contents
21.2 Introduction
MC68HC908LD64
Freescale Semiconductor
Data Sheet — MC68HC908LD64
—
Rev. 3.0
Section 21. Keyboard Interrupt Module (KBI)
21.2
21.3
21.4
21.5
21.6
21.7
21.7.1
21.7.2
21.8
21.8.1
21.8.2
21.9
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
pull-up device is also enabled on the pin.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 321
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Keyboard Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 328
I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .323
I/O Registers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
Keyboard Status and Control Register. . . . . . . . . . . . . . . . 326
Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 327
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .327
Keyboard Interrupt Module (KBI)
Data Sheet
321