P89C51X2 Ver la hoja de datos (PDF) - Philips Electronics

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componentes Descripción

Fabricante

P89C51X2

8-bit Flash microcontroller family 4K/8K/16K/32K Flash

Philips Electronics 

Philips Semiconductors

80C51 8-bit Flash microcontroller family

4K/8K/16K/32K Flash

Preliminary data

P89C51X2/52X2/54X2/58X2

Timer 1

Overflow

÷2

SMOD = 0

SMOD = 1

Write

to

SBUF

80C51 Internal Bus

TB8

DS Q

CL

SBUF

Zero Detector

÷ 16

Serial

Port

Interrupt

Sample

1-to-0

Transition

Detector

RxD

Start

TX Clock

Shift

TX Control

T1

Data

Send

÷ 16

Start

RX Clock RI

RX Control

Load

SBUF

Shift

1FFH

Bit Detector

Load

SBUF

Input Shift Register

(9 Bits)

Shift

SBUF

Read

SBUF

TX

Clock

80C51 Internal Bus

Write to SBUF

Data

Shift

Send

S1P1

TxD

Start Bit

D0

D1

D2

D3

TI

RX

Clock

÷ 16 Reset

RxD

Bit Detector

Sample Times

Start

Bit

D0

D1

D2

D3

Shift

RI

D4

D5

D6

D7

D4

D5

D6

D7

Figure 15. Serial Port Mode 1

2002 Jun 06

25

Stop Bit

Stop Bit

TxD

Transmit

Receive

SU00540

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