參數(shù)資料
型號(hào): D87C51
廠商: INTEL CORP
元件分類(lèi): 微控制器/微處理器
英文描述: CHMOS SINGLE-CHIP 8-BIT MICROCONTROLLER
中文描述: 8-BIT, UVPROM, 12 MHz, MICROCONTROLLER, CDIP40
封裝: CERDIP-40
文件頁(yè)數(shù): 16/21頁(yè)
文件大?。?/td> 284K
代理商: D87C51
87C51/80C51BH/80C31BH
SERIAL PORT TIMINGDSHIFT REGISTER MODE
12 MHz
Oscillator
24 MHz
Oscillator
Variable Oscillator
Symbol
Parameter
Units
Min
Max
Min
Max
Min
Max
TXLXL
Serial Port Clock
Cycle Time
1.0
0.500
12TCLCL
m
s
TQVXH
Output Data Setup
to Clock Rising Edge
700
284
10TCLCL
b
133
ns
TXHQX
Output Data Hold
After Clock
Rising Edge
87C51/BH
87C51-24/BH-24
ns
50
2TCLCL
b
117
2TCLCL
b
34
34
TXHDX
Input Data Hold
After Clock
Rising Edge
0
0
0
ns
TXHDV
Clock Rising Edge
to Input Data Valid
700
283
10TCLCL
b
133
ns
SHIFT REGISTER MODE TIMING WAVEFORMS
272335–18
AC TESTING INPUT, OUTPUT WAVEFORMS
272335–19
AC inputs during testing are driven at V
CC
b
0.5 for a Logic ‘‘1’’
and 0.45V for a Logic ‘‘0.’’ Timing measurements are made at V
IH
min for a Logic ‘‘1’’ and V
IL
max for a Logic ‘‘0’’.
FLOAT WAVEFORMS
272335–20
For timing purposes a port pin is no longer floating when a
100 mV change from load voltage occurs, and begins to float
when a 100 mV change from the loaded V
OH
/V
OL
level occurs.
I
OL
/I
OH
e
g
20 mA.
16
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