參數(shù)資料
型號(hào): MC68HC05J5DW
廠(chǎng)商: MOTOROLA INC
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO20
封裝: SOIC-20
文件頁(yè)數(shù): 21/69頁(yè)
文件大?。?/td> 394K
代理商: MC68HC05J5DW
GENERAL RELEASE SPECIFICATION
December 11, 1996
MOTOROLA
INTERRUPTS
MC68HC05J5
4-2
REV 1.1
An RTI instruction is used to signify when the interrupt software service routine is
completed. The RTI instruction causes the register contents to be recovered from
the stack and normal processing to resume at the next instruction that was to be
executed when the interrupt took place. Figure 4-1 shows the sequence of events
that occur during interrupt processing.
Figure 4-1. Interrupt Processing Flowchart
4.2
RESET INTERRUPT SEQUENCE
The RESET function is not in the strictest sense an interrupt; however, it is acted
upon in a similar manner as shown in Figure 4-1. A low level input on the RESET
pin or an internally generated RST signal causes the program to vector to its
starting address which is specied by the contents of memory locations $07FE
and $07FF. The I-bit in the condition code register is also set.
Execute
Instruction
From
RESET
Is
I-Bit
Set?
Load PC From:
SWI: $07FC, $07FD
IRQ: $07FA-$07FB
TIMER: $07F8-$07F9
Set I-Bit in CCR
Stack PC, X, A, CC
Clear IRQ
Request
Latch if IRQE1 is
cleared
Restore Registers
from stack
CC, A, X, PC
Y
N
IRQ
External
Interrupt?
Y
N
TIMER
Internal
Interrupt?
Y
N
Fetch Next
Instruction
RTI
Instruction
?
Y
N
SWI
Instruction
?
Y
N
相關(guān)PDF資料
PDF描述
MC68HC05J5CJDW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO16
MC68HC05JB4DW 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PDSO28
MC68HC05JJ6DW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC05JJ6P 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20
MC68HC05JJ6CP 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68HC05JJ6 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification Microcontrollers
MC68HC05JJ6CDW 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification Microcontrollers
MC68HC05JJ6CDWE 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification Microcontrollers
MC68HC05JJ6CP 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification Microcontrollers
MC68HC05JJ6CPE 制造商:FREESCALE 制造商全稱(chēng):Freescale Semiconductor, Inc 功能描述:General Release Specification Microcontrollers