P87LPC779FDH datasheet(56/74 Pages) PHILIPS

Part #	P87LPC779FDH

Description	CMOS single-chip 8-bit 80C51 microcontroller with 128-byte data RAM, 8 kB OTP

PDF	74 Pages

Scroll/Zoom	100%

Manufacturer	PHILIPS [NXP Semiconductors]

Direct Link	http://www.nxp.com

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56 / 74 page

Philips Semiconductors

P87LPC779

CMOS single-chip 8-bit microcontroller

Product data

Rev. 02 — 03 May 2004

56 of 74

9397 750 13213

Fig 25. Serial port mode 2.

80C51 INTERNAL BUS

SBUF

ZERO DETECTOR

TxD

TX CONTROL

TX CLOCK

START STOP BIT

GEN

serial port

interrupt

SHIFT

SEND

load

SBUF

INPUT SHIFT REGISTER

START

LOAD SBUF

SHIFT

CLOCK

1FFH

RX CONTROL

SBUF

read

SBUF

transmit

RxD

P3.0 alt

input

function

80C51 internal bus

DATA

TB8

÷16

÷2

phase 2 clock

(1/2 f

OSC)

SMOD1 = 0

SMOD1 = 1

1-TO-0

TRANSITION

DETECTOR

BIT

DETECTOR

start

bit

stop bit

TX clock

write to

SBUF

send

data

shift

TxD

stop bit gen

receive

clock

shift

bit detector

sample times

start

bit

RxD

write to

SBUF

002aaa643

TB8

RB8

÷16 reset

P87LPC779FDH Datasheet(PDF) 56 Page - NXP Semiconductors

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