MC68HC908LJ12CPB FREESCALE [Freescale Semiconductor, Inc], MC68HC908LJ12CPB Datasheet - Page 362

• Manufacturer Part Number: MC68HC908LJ12CPB
• Description: 8-bit microcontroller units
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

19.1 Contents
19.2 Introduction
MC68HC908LJ12
Freescale Semiconductor
Technical Data — MC68HC908LJ12
—
Rev. 2.1
Section 19. Keyboard Interrupt Module (KBI)
19.2
19.3
19.4
19.5
19.5.1
19.6
19.6.1
19.6.2
19.7
19.8
19.9
19.10 Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 370
The keyboard interrupt module (KBI) provides eight independently
maskable external interrupts which are accessible via PTA0–PTA3 and
PTD4–PTD7. When a port pin is enabled for keyboard interrupt function,
an internal 30kΩ pullup device is also enabled on the pin.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 363
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Wait Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 369
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 370
I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 364
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .365
Keyboard Interrupt Registers . . . . . . . . . . . . . . . . . . . . . . . . . 367
Keyboard Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 367
Keyboard Status and Control Register. . . . . . . . . . . . . . . . 368
Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 369
Keyboard Interrupt Module (KBI)
Technical Data
363