p87lpc761bdh NXP Semiconductors, p87lpc761bdh Datasheet - Page 26

• Manufacturer Part Number: p87lpc761bdh
• Description: Low Power, Low Price, Low Pin Count 16 Pin Microcontroller With 2 Kbyte Otp
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2002 Mar 07
Low power, low price, low pin count (16 pin)
microcontroller with 2 kbyte OTP
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)
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.
A SERIES RESISTOR MAY BE REQUIRED IN ORDER TO
LIMIT CRYSTAL DRIVE LEVELS. THIS IS PARTICULARLY
IMPORTANT FOR LOW FREQUENCY CRYSTALS (SEE TEXT).
Figure 17. Using an External Clock Input
Figure 16. Using the Crystal Oscillator
CMOS COMPATIBLE EXTERNAL
OSCILLATOR SIGNAL
CERAMIC RESONATOR
QUARTZ CRYSTAL OR
23
X1
X2
87LPC761
*
SU01575
X1
X2
87LPC761
P87LPC761
SU01574
Preliminary data