Rainbow-electronics T89C51AC2 Uživatelský manuál stáhnout pdf (Strana 2)

T89C51AC2

Rev. B – 19-Dec-01

The added features of the T89C51AC2 make it more powerful for applications that need

A/D conversion, pulse width modulation, high speed I/O and counting capabilities such

as industrial control, consumer goods, alarms, motor control, etc.

While remaining fully compatible with the 80C52 it offers a superset of this standard

microcontroller. In X2 mode a maximum external clock rate of 20 MHz reaches a 300 ns

cycle time.

3. Block Diagram

Timer 0

INT

RAM

256x8

RxD

TxD

PSEN

ALE

XTAL2

XTAL1

UART

CPU

Timer 1

INT1

Ctrl

INT0

C51

CORE

Port 0

Port 1

Port 2

Port 3

Parallel I/O Ports & Ext. Bus

P1(1)

ERAM

1kx8

IB-bus

PCA

RESET

Watch

Dog

PCA

ECI

Vss

Vcc

(1): 8 analog Inputs / 8 Digital I/O

Timer2

T2EX

Port 4

P4(2)

Emul

Unit

10 bit

ADC

Flash

32kx

Boot

loader

2kx8

PROM

2kx8

(2): 2-Bit I/O Port

1 2 3 4 5 6 7 ... 109 110

T89C51AC2 1

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