參數(shù)資料
型號: MC68HC05K3CDW
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 71/132頁
文件大?。?/td> 2612K
代理商: MC68HC05K3CDW
Interrupts
Hardware Interrupts
MC68HC05K3 — Rev. 5
Technical Data
Interrupts
4.6 Hardware Interrupts
All hardware interrupts except RESET are maskable by the I bit in the
CCR. If the I bit is set, all hardware interrupts (internal and external) are
disabled. Clearing the I bit enables the hardware interrupts. The two
types of hardware interrupts are explained here.
4.6.1 External Interrupt (IRQ)
The IRQ pin provides an asynchronous interrupt to the CPU. A block
diagram of the IRQ function is shown in Figure 4-3.
The IRQ pin is one source of an IRQ interrupt, and a mask option is
available to enable the four lower order port A pins (PA0–PA3) to act as
other IRQ interrupt sources. All of these sources are combined into a
single ORing function that is latched by the IRQ latch.
The IRQ latch is set on the falling edge of the IRQ pin or on the rising
edge of a PA0–PA3 pin, if port A interrupts have been enabled by the
mask option.
Figure 4-3. IRQ Function Block Diagram
LATCH
R
VDD
IRQ PIN
IRQE
IRQ SENSITIVITY
MASK OPTION
IRQF
TO IRQ
PROCESSING
IN CPU
IRQ VECTOR FETCH
TO BIH & BIL
INSTRUCTION
SENSING
RST
PORT A IRQ
MASK OPTION
PA0
PA1
PA2
PA3
IRQR
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
ARCHIVED
BY
FREESCALE
SEMICONDUCT
OR,
INC.
2006
相關(guān)PDF資料
PDF描述
MC68HC05K3CSD 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC05K3P 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP16
MC68HC05K3CSDR2 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO20
MC68HC05K3CDWR2 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
MC68HC05K3DWR2 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDSO16
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05K3CP 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3CSD 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3DW 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05K3P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontroller Unit
MC68HC05L10 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:HCMOS Microcomputer Unit