PSD312 datasheet(5/85 Pages) STMICROELECTRONICS

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PSD3XX Family

Notation

For a complete product comparison, refer to Table 1.

PSD3XX references the standard version of the PSD3XX family, which are ideal for

general-purpose embedded control applications.

PSD3XXR SRAM-less version of the PSD3XX. If you don’t require the 16 Kb SRAM or

need a larger external SRAM, go with this part to save cost.

ZPSD3XX has improved technology that helps reduce current consumption using the Turbo

bit. Excellent if you require a 5 V version of the PSD3XX that uses less power.

ZPSD3XXR SRAM-less version of the ZPSD3XX.

ZPSD3XXV 2.7 V to 5.5 V operation, ideal for very low-power and low-voltage

applications.

ZPSD3XXRV SRAM-less version of the ZPSD3XXV.

Throughout this data sheet, references are made to the PSD3XX. In most cases, these

references also cover the entire family. Exceptions will be noted. References, such as

“3X1 only” cover all parts that have a 301 or 311 in the part number. Use the following table

to determine what references cover which product versions:

Reference

PSD3XX

PSD3XXR

ZPSD3XX

ZPSD3XXR

ZPSD3XXV

ZPSD3XXRV

PSD3XX

PSD

PSD3XX only

Non-ZPSD

ZPSD only

ZPSD3XX

Non-V versions

V versions only

V suffix

ZPSD3XXV only

SRAM-less

Non-R

The PSD3XX I/O ports can be used for:

• Standard I/O ports

• Programmable chip select outputs

• Address inputs

• Demultiplexed address outputs

• A data bus port for non-multiplexed MCU applications

• A data bus “repeater” port that shares and arbitrates the local MCU data bus with

external devices.

Implementing your design has never been easier than with PSDsoft —ST’s software

development suite. Using PSDsoft, you can do the following:

• Configure your PSD3XX to work with virtually any microcontroller

• Specify what you want implemented in the programmable logic using a high-level

Hardware Description Language (HDL)

• Simulate your design

• Download your design to the part using a programmer.

1.0

Introduction

(cont.)

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