ST52T301 datasheet(2/100 Pages) STMICROELECTRONICS

2 / 100 page

The flexible I/O configuration of ST52x301 allows

to interface with a wide range of external devices,

like D/A converters, power control devices (SCRs,

TRIACs) and external sensors.

The OTP (One Time Programmable) device is fully

compatible with the EPROM windowed version,

which may be used to create prototype systems

and for the pre-production phases.

The Fuzzy Core includes the fuzzifier (ALPHA

calculator), the inference unit and the defuzzifier.

It allows to manage up to 300 Rules (4 Inputs and

1 Output). The rules could be shared in different

fuzzy subroutines that can be activated by user

defined conditions.

T he

I / O

c apabi l it i es,

dem anded

f r om

microcontroller applications, are fulfilled by

ST52x301 with 4 Analog Inputs, an asynchronous

Peripheral interface (UART) and an 8-bit I/O

communicationport in orderto transferdata from/to

the on-chip Register File.

The voltage reference provides biasing to the

analog portion of the internal circuitry. The internal

reference is a 2.5V Bandgap reference.

The voltage reference can supply up to 0.1 mA of

current to power external circuitry.

ST52x301 includes an 8-bit sampling Analog to

Digit al (A/ D) C onve r te r w i t h a 4 analog

channel fa st multiplexer (32

µs conversion

time/channel).

It is possible to perform operations on data stored

in the Register File (16 bytes), allowing to manage

new inputs and feedback outputs.

The TRIAC/PWM Driver peripheral allows to

manage directly power devices, implementing

three different operating modes: Burst Mode

( i. e.T her m al A pp li ca t ion s) , Phas e A ng le

Partialization (i.e. Motors Control by TRIACs) and

high frequency PWM controls.

A programmable Timer with Internal Prescaler,

using both internal or external clock, is available.

The microcontroller configuration is stored in the

internal EPROM.

power f u l

devel opm ent

envi r onm ent ,

FUZZYSTUDIO

™ 3.0, consisting of a board

an d s of t w a r e t ool s , a l l o w s an eas y

configuration and use of ST52x301.

ST 52 x 3 0 1

i s

f u l l y

s up po r t ed

b y

FUZZYSTUDIO3.0 so f t war e t ools allow ing

to gra ph ic al ly d es ig n a project and obtain an

optimized microcode.

ST52x301 exploits a SGS-THOMSON patented

strategy to store the MFs in its internal memory.

OSCILLATO R

ALU

FUZZY

CORE

SYSTEM

REGISTERS

CONTROL

UNIT

FILE

PARALLEL

I/O PORT

2kBytes

EPROM

TRIAC/PWM

DRIVE R

PROG.TIMER

WITH

PRESC ALER

SCI

A/D

CONVERT ER

BAND-GAP

REFERENCE

Figure 1. ST52x301 Architectural Block Diagram

2/99

ST52T301/E301

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