參數(shù)資料
型號(hào): MV80C51-16D
廠商: TEMIC SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
文件頁數(shù): 21/170頁
文件大?。?/td> 4133K
代理商: MV80C51-16D
117
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
16.4
Clock Characteristics
16.4.1
Accuracy of Calibrated Internal Oscillator
It is possible to manually calibrate the internal oscillator to be more accurate than default factory calibration. Note
that the oscillator frequency depends on temperature and voltage. Voltage and temperature characteristics can be
Notes:
1. Accuracy of oscillator frequency at calibration point (fixed temperature and fixed voltage).
16.4.2
External Clock Drive
Figure 16-2. External Clock Drive Waveform
Table 16-2.
Calibration Accuracy of Internal RC Oscillator
Calibration
Method
Target Frequency
VCC
Temperature
Accuracy at given Voltage
& Temperature(1)
Factory
Calibration
8.0 MHz
3V
25
C±10%
User
Calibration
Fixed frequency within:
7.3 – 8.1 MHz
Fixed voltage within:
1.8V – 5.5V
Fixed temp. within:
-40
C – 85C
±1%
VIL1
VIH1
Table 16-3.
External Clock Drive Characteristics
Symbol
Parameter
VCC = 1.8 - 5.5V
VCC = 2.7 - 5.5V
VCC = 4.5 - 5.5V
Units
Min.
Max.
Min.
Max.
Min.
Max.
1/tCLCL
Clock Frequency
0
4
0
8
0
12
MHz
tCLCL
Clock Period
250
125
83
ns
tCHCX
High Time
100
50
33
ns
tCLCX
Low Time
100
50
33
ns
tCLCH
Rise Time
2.0
1
0.6
s
tCHCL
Fall Time
2.0
1
0.6
s
t
CLCL
Change in period from one clock cycle to the next
2
%
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