參數(shù)資料
型號: 89C1051U
廠商: Atmel Corp.
英文描述: 8-Bit Microcontroller with 1K Bytes Flash
中文描述: 8位閃存微控制器1K字節(jié)
文件頁數(shù): 11/14頁
文件大?。?/td> 201K
代理商: 89C1051U
AT89C1051U
11
Shift Register Mode Timing Waveforms
Serial Port Timing: Shift Register Mode Test Conditions
(V
CC
= 5.0V
±
20%; Load Capacitance = 80 pF)
Symbol
Parameter
12 MHz Osc
Variable Oscillator
Units
Min
Max
Min
Max
t
XLXL
Serial Port Clock Cycle Time
1.0
12t
CLCL
μ
s
t
QVXH
Output Data Setup to Clock Rising Edge
700
10t
CLCL
-133
ns
t
XHQX
Output Data Hold After Clock Rising Edge
50
2t
CLCL
-117
ns
t
XHDX
Input Data Hold After Clock Rising Edge
0
0
ns
t
XHDV
Clock Rising Edge to Input Data Valid
700
10t
CLCL
-133
ns
AC Testing Input/Output Waveforms
(1)
Note:
1.
AC Inputs during testing are driven at V
CC
- 0.5V for
a logic 1 and 0.45V for a logic 0. Timing measure-
ments are made at V
IH
min. for a logic 1 and V
IL
max. for a logic 0.
Float Waveforms
(1)
Note:
1.
For timing purposes, a port pin is no longer float-
ing when a 100 mV change from load voltage
occurs. A port pin begins to float when 100 mV
change from the loaded V
OH
/V
OL
level occurs.
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