參數(shù)資料
型號: MC68HSC05P1AP
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 60/124頁
文件大?。?/td> 623K
代理商: MC68HSC05P1AP
NON-DISCLOSURE
AGREEMENT
REQUIRED
Interrupts
General Release Specification
MC68HC05P1A Rev. 3.0
40
Interrupts
MOTOROLA
Figure 4-1. Interrupt Processing Flowchart
NOTE:
The internal interrupt latch is cleared nine PH2 clock cycles after the
interrupt is recognized (after location $1FFA is read). Therefore, another
external interrupt pulse can be latched during the IRQ service routine.
IS I BIT
SET?
FROM RESET
LOAD PC FROM:
SWI: $1FFC, $1FFD
IRQ: $1FFA-$1FFB
TIMER: $1FF8-$1FF9
SET
I BIT IN CCR
STACK
PC, X, A, CC
CLEAR IRQ
REQUEST
LATCH
RESTORE REGISTERS
FROM STACK
CC, A, X, PC
Y
N
EXECUTE
INSTRUCTION
FETCH NEXT
INSTRUCTION
IRQ
INTERRUPT?
Y
N
TIMER
INTERRUPT?
Y
N
SWI
INSTRUCTION?
Y
N
RTI
INSTRUCTION?
Y
N
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