mc68hc908gp32 Freescale Semiconductor, Inc, mc68hc908gp32 Datasheet - Page 105

• Manufacturer Part Number: mc68hc908gp32
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10
Keyboard Interrupt (KBI) Module
10.1 Introduction
The keyboard interrupt module (KBI) provides independently maskable external interrupts.
The KBI shares its pins with general-purpose input/output (I/O) port pins.
10.2 Features
Features of the keyboard interrupt module include:
10.3 Functional Description
The keyboard interrupt module controls the enabling/disabling of interrupt functions on the KBI pins.
These pins can be enabled/disabled independently of each other.
Freescale Semiconductor
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Keyboard interrupt pins with separate keyboard interrupt enable bits and one keyboard interrupt
mask
Pullup device automatically enabled when pin is used for KBI input
Programmable edge-only or edge and level interrupt sensitivity
Exit from low-power modes
KBI0
KBIx
VECTOR FETCH
INTERNAL BUS
DECODER
KBIE0
KBIEx
Figure 10-1. Keyboard Interrupt Block Diagram
RESET
ACKK
MC68HC908GP32 Data Sheet, Rev. 10
MODEK
V
DD
KBI LATCH
D
CK
CLR
Q
IMASKK
SYNCHRONIZER
KEYF
KEYBOARD
INTERRUPT
REQUEST
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