參數(shù)資料
型號: MC68HLC705KJ1CDW
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDSO16
封裝: SOIC-16
文件頁數(shù): 69/117頁
文件大?。?/td> 1644K
代理商: MC68HLC705KJ1CDW
External Interrupt Module (IRQ)
Operation
MC68HC705KJ1MC68HRC705KJ1MC68HLC705KJ1 — Rev. 4.0
Data Sheet
MOTOROLA
External Interrupt Module (IRQ)
55
Figure 5-3. Interrupt Flowchart
If edge-sensitive-only triggering is selected, a falling edge on the IRQ/VPP pin
latches an external interrupt request. A subsequent external interrupt request can
be latched only after the voltage level on the IRQ/VPP pin returns to logic 1 and then
falls again to logic 0.
The IRQ/VPP pin contains an internal Schmitt trigger as part of its input to improve
noise immunity. The voltage on this pin can affect the mode of operation and
should not exceed VDD.
EXTERNAL
INTERRUPT?
I BIT SET?
TIMER
INTERRUPT?
FETCH NEXT
INSTRUCTION.
SWI
INSTRUCTION?
RTI
INSTRUCTION?
STACK PCL, PCH, X, A, CCR.
SET I BIT.
LOAD PC WITH INTERRUPT VECTOR.
YES
UNSTACK CCR, A, X, PCH, PCL.
EXECUTE INSTRUCTION.
CLEAR IRQ LATCH.
NO
FROM RESET
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