參數(shù)資料
型號： 935267488112
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 20 MHz, MICROCONTROLLER, PDSO20
封裝： 7.50 MM, PLASTIC, SO-20
文件頁數(shù)： 27/69頁
文件大?。?/td> 352K
代理商： 935267488112
Philips Semiconductors
Preliminary specification
87LPC768
Low power, low price, low pin count (20 pin) microcontroller with
4 kB OTP 8-bit A/D, Pulse Width Modulator
2000 May 02
31
SU01389
87LPC768
QUARTZ CRYSTAL OR
CERAMIC RESONATOR
X2
X1
THE OSCILLATOR MUST BE CONFIGURED IN ONE OF
THE FOLLOWING MODES:
– LOW FREQUENCY CRYSTAL
– MEDIUM FREQUENCY CRYSTAL
– HIGH FREQUENCY CRYSTAL
*
CAPACITOR VALUES MAY BE OPTIMIZED FOR
DIFFERENT OSCILLATOR FREQUENCIES (SEE TEXT)
A SERIES RESISTOR MAY BE REQUIRED IN ORDER TO
LIMIT CRYSTAL DRIVE LEVELS. THIS IS PARTICULARLY
IMPORTANT FOR LOW FREQUENCY CRYSTALS (SEE TEXT).
Figure 19. Using the Crystal Oscillator
SU01390
87LPC768
X2
X1
THE OSCILLATOR MUST BE CONFIGURED IN
THE EXTERNAL CLOCK INPUT MODE.
A CLOCK OUTPUT MAY BE OBTAINED ON
THE X2 PIN BY SETTING THE ENCLK BIT IN
THE P2M1 REGISTER.
CMOS COMPATIBLE EXTERNAL
OSCILLATOR SIGNAL
Figure 20. Using an External Clock Input
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