參數(shù)資料
型號： EM78P468NBQ
廠商： ELAN Microelctronics Corp .
元件分類： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁數(shù)： 41/82頁
文件大?。?/td> 1491K
代理商： EM78P468NBQ
EM78P468N
8-BIT Microcontroller
4.6.4
RC Oscillator Mode with Internal Capacitor
If both precision and cost are taken into consideration, This LSI also offers a special
oscillation mode, which is equipped with an internal capacitor and an external resistor
connected to VDD. The internal capacitor functions as temperature compensator. In
order to obtain more accurate frequency, a precise resistor is recommended.
EM78P468N
R-OSCI or Xin
Rext
VDD
Fig. 11 Circuit for Internal C Oscillator Mode
Table 6 RC Oscillator Frequencies
Pin
Rext
Average Fosc 5V, 25
°
C Average Fosc 3V, 25
°
C
51k
2.2221 MHz
2.1972 MHz
100k
300k
1.1345 MHz
381.36KHz
1.1203 MHz
374.77 KHz
R-OSCI
Xin
2.2M
32.768KHz
32.768KHz
Note:
Measured from QFP packages with frequency drift of about
±
30%.
Values are provided for design reference only.
Product Specification
(V1.2) 03.15.2005
(This specification is subject to change without further notice)
37
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