UPSD3233 datasheet(7/170 Pages) STMICROELECTRONICS

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uPSD3234A, uPSD3234BV, uPSD3233B, uPSD3233BV

SUMMARY DESCRIPTION

The uPSD323x Series combines a fast 8051-

based microcontroller with a flexible memory

structure, programmable logic, and a rich periph-

eral mix including USB, to form an ideal embedded

controller. At its core is an industry-standard 8032

MCU operating up to 40MHz.

A JTAG serial interface is used for In-System Pro-

gramming (ISP) in as little as 10 seconds, perfect

for manufacturing and lab development.

The USB 1.1 low-speed interface has one Control

endpoint and two Interrupt endpoints suitable for

HID class drivers.

The 8032 core is coupled to Programmable Sys-

tem Device (PSD) architecture to optimize the

8032 memory structure, offering two independent

banks of Flash memory that can be placed at vir-

tually any address within 8032 program or data ad-

dress space, and easily paged beyond 64K bytes

using on-chip programmable decode logic.

Dual Flash memory banks provide a robust solu-

tion for remote product updates in the field through

In-Application Programming (IAP). Dual Flash

banks also support EEPROM emulation, eliminat-

ing the need for external EEPROM chips.

General purpose programmable logic (PLD) is in-

cluded to build an endless variety of glue-logic,

saving external logic devices. The PLD is config-

ured using the software development tool, PSD-

soft

Express,

available

from

the

web

www.st.com/psm, at no charge.

The uPSD323x also includes supervisor functions

such as a programmable watchdog timer and low-

voltage reset.

Figure 2. Block Diagram

PA0:7

PB0:7

PD1:2

PC0:7

MCU

Bus

P4.0:7

P1.0:7

P3.0:7

uPSD323x

Dedicated

Pins

Supervisor:

Watchdog and Low-Voltage Reset

1st Flash Memory:

128K or 256K Bytes

2nd Flash Memory:

32K Bytes

SRAM:

8K Bytes

Programmable

Decode and

Page Logic

General

Purpose

Programmable

Logic,

16 Macrocells

(8) GPIO, Port A

(80-pin only)

(8) GPIO, Port B

(4) GPIO, Port C

(2) GPIO, Port D

JTAG ISP

8032 Address/Data/Control Bus

(80-pin device only)

CC, VDD, GND, Reset, Crystal In

8032

MCU

Core

(3) 16-bit

Timer/

Counters

(2)

External

Interrupts

(4) 8-bit ADC

UART0

(8) GPIO, Port 1

(8) GPIO, Port 3

(8) GPIO, Port 4

UART1

(5) 8-bit PWM

AI10429

USB+,

USB–

USB v1.1

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