参数资料
型号: MC68HC705T16B
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: PLASTIC, SDIP-56
文件页数: 60/128页
文件大小: 734K
代理商: MC68HC705T16B
MC68HC05T16
MOTOROLA
4-7
RESETS AND INTERRUPTS
4
Figure 4-3 External Interrupt Circuit and Timing
+
&
+
EXTERNAL
REQUEST
INTERRUPT
POWER-ON RESET
EXTERNAL RESET
EXTERNAL INTERRUPT
BEING SERVICED
D
C
R
Q
VDD
IRQ
LEVEL SENSITIVE TRIGGER
IRQ
I BIT (CC)
IRQ
tILIH
tILIL
EDGE SENSITIVE TRIGGER
CONDITION
The minimum pulse width tILIH is either
125ns (VDD=5V) or 250ns (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
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
TPG
35
相关PDF资料
PDF描述
MC68HC05T16B 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
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