參數(shù)資料
型號(hào): MC68HC08GP8ACFB
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 8.2 MHz, MICROCONTROLLER, PQFP44
封裝: PLASTIC, QFP-44
文件頁數(shù): 113/126頁
文件大?。?/td> 4243K
代理商: MC68HC08GP8ACFB
MC68HC08GP8A
Data Sheet
MOTOROLA
External Interrupt (IRQ)
87
Data Sheet — MC68HC08GP8A
Section 7. External Interrupt (IRQ)
7.1 Introduction
The IRQ (external interrupt) module provides a maskable interrupt input.
7.2 Features
Features of the IRQ module include:
A dedicated external interrupt pin (IRQ)
IRQ interrupt control bits
Hysteresis buffer
Programmable edge-only or edge and level interrupt sensitivity
Automatic interrupt acknowledge
Internal pullup resistor
7.3 Functional Description
A logic 0 applied to the external interrupt pin can latch a CPU interrupt request.
Figure 7-1 shows the structure of the IRQ module.
Figure 7-1. IRQ Module Block Diagram
IMASK
DQ
CK
CLR
IRQ
HIGH
INTERRUPT
TO MODE
SELECT
LOGIC
REQUEST
VDD
MODE
VOLTAGE
DETECT
IRQF
TO CPU FOR
BIL/BIH
INSTRUCTIONS
VECTOR
FETCH
DECODER
INT
ERNAL
ADDRES
S
BU
S
RESET
VDD
INTERNAL
PULLUP
DEVICE
ACK
IRQ
SYNCHRONIZER
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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