參數(shù)資料
型號: MSM80C49
廠商: OKI SEMICONDUCTOR CO., LTD.
元件分類: 8位微控制器
英文描述: CMOS 8-Bit Microcontroller
中文描述: 的CMOS 8位微控制器
文件頁數(shù): 35/39頁
文件大?。?/td> 355K
代理商: MSM80C49
35/38
Semiconductor
MSM80C31F/80C51F
AC Characteristics Measuring Conditions
Input/output signal
V
OH
V
OL
V
IH
V
IL
V
IH
V
IL
TEST POINT
V
OH
V
OL
*
The input signals in AC test mode are either V
OH
(logic "1") or V
OL
(logic "0") input signals
where logic "1" corresponds to a CPU output signal waveform measuring point in excess of
V
IH
, and logic "0" to a point below V
IL
.
Floating
*
The port 0 floating interval is measured from the time the port 0 pin voltage drops below V
IH
after sinking to GND at 2.4 mA when switching to floating status from a "1" output, and from
the time the port 0 pin voltage exceeds V
IL
after connecting to a 400
m
A source when
switching to floating status from a "0" output.
V
OH
V
OL
V
IH
V
IL
V
IH
V
IL
Floating
V
OH
V
OL
XTAL1 External Clock Input Waveform Conditions
Parameter
Min.
DC
20
20
Max.
16
20
20
Unit
MHz
ns
ns
ns
ns
Symbol
Variable Clock
See Guaranteed Operating Range
External Clock Frequency
High Time
Low Time
Rise Time
Fall Time
1/t
CLCL
t
CHCX
t
CLCX
t
CLCH
t
CHCL
External clock waveform
0.7V
CC
0.2V
CC
– 0.1
t
CHCX
0.45 V
V
CC
– 0.5
t
CHCL
t
CLCH
t
CLCX
t
CLCL
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