參數資料
型號: MC68HC05K3DWR2
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: 71/132頁
文件大小: 1188K
代理商: MC68HC05K3DWR2
Interrupts
Hardware Interrupts
MC68HC05K3 — Revision 4.0
Technical Data
MOTOROLA
Interrupts
43
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
相關PDF資料
PDF描述
MC68HC05L25PB 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP52
MC68HC05L2CB 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP42
MC68HC705L2K 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP42
MC68HC05L6FN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC05L7FT1 8-BIT, MROM, 2.45 MHz, MICROCONTROLLER, PQFP12
相關代理商/技術參數
參數描述
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
MC68HC05L16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05L16CFU 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers
MC68HC05L16FU 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Microcontrollers