參數(shù)資料
型號(hào): 83C154S
英文描述: CMOS 8-bit Microcontroller(258.00 k)
中文描述: 的CMOS 8位微控制器(258.00十一)
文件頁(yè)數(shù): 35/40頁(yè)
文件大?。?/td> 258K
代理商: 83C154S
35/40
MSM80C154S/83C154S
Semiconductor
(7) AC Characteristics Measuring Conditions
1.Input/output signal
V
OH
V
OL
V
OH
V
OL
V
IH
V
IL
V
IH
V
IL
TEST POINT
*
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
.
2.Floating
V
OH
V
OL
V
OH
V
OL
V
IH
V
IL
V
IH
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.
(8) XTAL1 external clock input waveform conditions
Parameter
Symbol
1/t
CLCL
t
CHCx
t
CLCX
t
CLCH
t
CHCL
Min.
0
15
15
Max.
24
5
5
Unit
MHz
ns
ns
ns
ns
External Clock Freq.
Clock Pulse width 1
Clock Pulse width 2
Rise Time
Fall Time
External Clock Drive Waveform
0.7 V
CC
0.2 V
CC
- 0.1
t
CHCL
t
CLCH
t
CLCX
t
CLCL
t
CHCX
EXTERNAL
OSCILLATOR
SIGNAL
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