P87LPC768FD datasheet(33/64 Pages) PHILIPS

No de pièce	P87LPC768FD

Description	Low power, low price, low pin count 20 pin microcontroller with 4 kB OTP 8-bit A/D,and Pulse Width Modulator

PDF	64 Pages

Scroll/Zoom	100%

Fabricant	PHILIPS [NXP Semiconductors]

Site Internet	http://www.nxp.com

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33 / 64 page

Philips Semiconductors

Preliminary data

87LPC768

Low power, low price, low pin count (20 pin) microcontroller

with 4 kB OTP 8-bit A/D, Pulse Width Modulator

2001 Aug 06

SU01389

87LPC768

QUARTZ CRYSTAL OR

CERAMIC RESONATOR

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

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

P87LPC768FD Fiches technique(PDF) 33 Page - NXP Semiconductors