87LPC769 datasheet(31/61 Pages) PHILIPS

Part #	87LPC769

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

PDF	61 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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31 / 61 page

Philips Semiconductors

Preliminary specification

87LPC769

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

microcontroller with 4 kB OTP 8-bit A/D, and DAC

2001 Jan 11

SU01374

87LPC769

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

SU01375

87LPC769

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

87LPC769 Datasheet(PDF) 31 Page - NXP Semiconductors