P87LPC768FD datasheet(18/64 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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18 / 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

CNSW0: Counter Shadow register 0

Addr:

0D1H

Reset Value:

FFH

CNSW7

CNSW6

CNSW5

CNSW4

CNSW3

CNSW2

CNSW1

CNSW0

CNSW1: Counter Shadow register 1

Addr:

0D2H

Reset Value:

FFH

Unused

CNSW9

CNSW8

The word “Shadow” in the above refers to the fact that writes are not

into the register that controls the counter; rather they are into a

holding register. As described below the transfer of data from this

holding register, into the register which contains the actual reload

value, is controlled by the user’s program.

INTERNAL BUS

10 BIT SHADOW

10 BIT COUNTER

10 BIT SHADOW

10 BIT COMPARE

10 BIT SHADOW

10 BIT COMPARE

10 BIT SHADOW

10 BIT COMPARE

10 BIT SHADOW

10 BIT COMPARE

10 BIT COUNTER

A>B

RUN

XFER

BRAKE

BKCH

BKPS

BPEN

BKEN

BRAKE CONTROL LOGIC

2:1 MUX

PWM3I

PWM3B

PWM3

2:1 MUX

PWM2I

PWM2B

PWM2

2:1 MUX

PWM1I

PWM1B

PWM1

2:1 MUX

PWM0I

PWM0B

PWM0

SU01364

Figure 8. PWM Block Diagram

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