參數(shù)資料
型號: MC68HC05P18ADWE
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封裝: SOIC-28
文件頁數(shù): 67/130頁
文件大小: 1310K
代理商: MC68HC05P18ADWE
Interrupts
CPU Interrupt Processing
MC68HC05P18A
Technical Data
Interrupts
NON-DISCLOSURE
AGREEMENT
REQUIRED
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?
FROM RESET
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
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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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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