參數(shù)資料
型號(hào): MC68HC05SR3CP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2 MHz, MICROCONTROLLER, PDIP40
封裝: PLASTIC, DIP-40
文件頁數(shù): 35/96頁
文件大小: 612K
代理商: MC68HC05SR3CP
MOTOROLA
5-4
MC68HC05SR3
RESETS AND INTERRUPTS
5
Figure 5-2 Hardware Interrupt Processing Flowchart
From RESET
Is I-bit Set?
Fetch Next
Y
N
IRQ External
Y
N
Interrupt ?
Timer Interrupt?
Y
N
Keyboard Interrupt?
Y
N
Instruction
Execute
Instruction
Clear
External Interrupt
Request Latch
PC
→ (SP, SP–1)
Set I-bit in CCR
Load Interrupt
Restore Registers
from Stack
CC, A, X, PC
IRQ2 External
Y
N
Interrupt ?
X
→ (SP–2)
A
→ (SP–3)
CC
→ (SP–4)
Vectors to
SWI Instruction?
Y
N
RTI Instruction?
Y
N
Program Counter
TPG
38
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