參數(shù)資料
型號: MC68HC05BS8FB
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 64/128頁
文件大?。?/td> 752K
代理商: MC68HC05BS8FB
MOTOROLA
5-6
MC68HC05BS8
RESETS AND INTERRUPTS
5
Figure 5-3 External Interrupt Circuit and Timing
IRQ
tILIH
tILIL
EDGE SENSITIVE TRIGGER
CONDITION
The minimum pulse width tILIH is one
internal bus period. The period tILIL
should not be less than the number of
tCYC cycles it takes to execute the
interrupt service routine plus 21 tcyc
cycles.
tILIL
Wired ORed
Interrupt signals
IRQ
If after servicing an interrupt the IRQ
pin remains low, then the next interrupt
is recognized.
Normally used with pull-up resistors for
wired-OR connection.
(b) Interrupt Mode Diagram
LEVEL SENSITIVE TRIGGER
CONDITION
+
&
External
Request
Interrupt
Power-On Reset
External Reset
External Interrupt
being serviced
D
C
R
Q
VDD
IRQ pin
I-BIT (CCR)
(a) Interrupt Function Diagram
&
+
INTO bit
(read of vectors)
&
TPG
38
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