2

AT83C5127

7519A–SCR–04/05

Product description

AT83C5127 product is high-performance CMOS derivatives of the 80C51 8-bit micro-

controllers designed for USB smart card reader applications.

The AT83C5127 is a low pin count of the AT8xC5122 and is proposed in ROM version.

The ROM device is only factory programmable.

Block Diagram

DC/DC

Converter

UART

Interface

16-BIT

TIMERS

Interrupt

Controller

Alternate

Card

3.3V

Regulator

WATCH-DOG

POR

PFD

RESET

RST

PLL

PLLF

XTAL1

XTAL2

8MHz

Oscillator

256 x 8

RAM

512 x 8

XRAM

256 x 8

RAM

INTERNALADDRESSANDDATABUS

16K x 8

ROM

ParallelI/OPorts

8-BIT

PORT

USB

Interface

CCLK

CRST

CPRES

CC8

CC4

CIO

3.3V

Regulator

1-BIT

PORT

LED's

3-BIT

PORT