參數(shù)資料
型號(hào): MC68HC05BD5
廠商: Motorola, Inc.
英文描述: 8-Bit Microcontroller Units (MCU).(8位微控制器)
中文描述: 8位微控制器單元(MCU)。(8位微控制器)
文件頁(yè)數(shù): 38/112頁(yè)
文件大?。?/td> 676K
代理商: MC68HC05BD5
MOTOROLA
4-6
MC68HC05BD3
RESETS AND INTERRUPTS
4
Figure 4-3
External Interrupt Circuit and Timing
+
&
External
Interrupt
Request
Power-On Reset
External Reset
External Interrupt
being serviced
(read of vectors)
D
C
R
Q
Q
V
DD
IRQ pin
I BIT (CCR)
IRQ
t
ILIH
t
ILIL
EDGE SENSITIVE TRIGGER
CONDITION
The minimum pulse width t
ILIH
is one
internal bus period. The period t
ILIL
should not be less than the number of
t
CYC
cycles it takes to execute the
interrupt service routine plus 21 tcyc
cycles.
t
ILIL
Wired ORed
Interrupt signals
IRQ
If after servicing an interrupt the IRQ
pin remains low, then the next interrupt
is recognized. Normally used with wired
OR connection.
Normally used with pull-up resistors for
wired-OR connection.
(b) Interrupt Mode Diagram
(a) Interrupt Function Diagram
LEVEL SENSITIVE TRIGGER
CONDITION
&
+
IRQN bit
TPG
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