MC68HC908LK24 MOTOROLA [Motorola, Inc], MC68HC908LK24 Datasheet - Page 407
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MC68HC908LK24
Manufacturer Part Number
MC68HC908LK24
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908LK24.pdf
(465 pages)
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20.1 Contents
20.2 Introduction
MC68HC908LJ24/LK24 — Rev. 2
MOTOROLA
Data Sheet – MC68HC908LJ24
NOTE:
Section 20. Keyboard Interrupt Module (KBI)
20.2
20.3
20.4
20.5
20.5.1
20.6
20.6.1
20.6.2
20.7
20.7.1
20.7.2
20.8
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
(except PTD6 and PTD7), an internal 30kΩ pullup device is also enabled
on the pin.
PTD6/KBI6/SCL–PTD7/KBI7/SDA pins do not have internal pullup
devices. These two pins are open-drain when configured as outputs.
User should connect pullup devices when using these two pins for KBI
function.
Freescale Semiconductor, Inc.
For More Information On This Product,
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
I/O Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .409
Keyboard Interrupt Registers . . . . . . . . . . . . . . . . . . . . . . . . . 412
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414
Keyboard Module During Break Interrupts . . . . . . . . . . . . . . . 414
Keyboard Initialization . . . . . . . . . . . . . . . . . . . . . . . . . . . . 411
Keyboard Status and Control Register. . . . . . . . . . . . . . . . 412
Keyboard Interrupt Enable Register . . . . . . . . . . . . . . . . . . 413
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .414
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .414
Keyboard Interrupt Module (KBI)
Go to: www.freescale.com
Data Sheet
407
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