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參數資料
型號: MC68HC05P18A
廠商: Motorola, Inc.
英文描述: Low Cost HCMOS Microcontroller(低成本、8位HCMOS微控制器)
中文描述: 低成本HCMOS微控制器(低成本,8位HCMOS微控制器)
文件頁數: 41/130頁
文件大小: 1200K
代理商: MC68HC05P18A
Interrupts
CPU Interrupt Processing
MC68HC05P18A
Technical Data
MOTOROLA
Interrupts
41
L
G
R
causes the CPU state 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
IS I BIT
SET
FROMRESET
LOAD PC FROM
SWI: $3FFC AND $3FFD
IRQ: $3FFA–$3FFB
TIMER: $3FF8–$3FF9
SET
I BIT IN CCR
STACK
PC, X, A, CC
CLEAR IRQ
REQUEST
LATCH
RESTORE REGISTERS
FROMSTACK
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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參數描述
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