參數(shù)資料
型號(hào): MC68HC05F8B
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PDIP56
封裝: SDIP-56
文件頁數(shù): 63/126頁
文件大?。?/td> 736K
代理商: MC68HC05F8B
MC68HC05F8
MOTOROLA
5-5
INTERRUPTS
5
Figure 5-3 External Interrupt Circuit and Timing
+
&
+
EXTERNAL
REQUEST
INTERRUPT
POWER ON RESET
EXTERNAL RESET
WRITE “0” TO CLEAR INTFx
D
C
R
Q
VDD
IRQx
I BIT (CC)
IRQx
tILIH
tILIL
EDGE SENSITIVE TRIGGER
CONDITION
The minimum pulse width tILIH is either
140ns (VDD=5V) or 280ns (VDD=3V).
The period tILIL should not be less than
the number of tcyc cycles it takes to ex-
ecute the interrupt service routine plus
21 tcyc cycles.
INTERRUPT PIN
tILIL
Wired ORed
Interrupt signals
IRQ (MCU)
If after servicing an interrupt the
external interrupt pins remain low, then
the next interrupt is recognized.
Normally
used
with
wired
OR
connection.
(b) Interrupt Mode Diagram
(a) Interrupt Function Diagram
LEVEL SENSITIVE TRIGGER
CONDITION
IRQi
IRQn
+
IRQx sensitivity option INTNx
INTFx bit
TPG
39
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