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ZPSD211RN

Low Cost Field Programmable Microcontroller Peripherals

STMicroelectronics 

PSD211R Family

3.0

Key Features

t Low cost programmable microcontroller peripheral

t 256Kb of UV EPROM with the following features:

• Configurable as 32 K x 8

• Divided into eight equally-sized mappable blocks for optimized address mapping

• As fast as 70 ns access time, which includes address decoding

t 19 I/O pins that can be individually configured for :

• Microcontroller I/O port expansion

• Programmable Address decoder (PAD) I/O

• Latched address output

t Two Programmable Arrays (PAD A and PAD B) replace your discrete PLD or decoder

and have the following features:

• Up to 13 Inputs and 24 outputs

• 36 Product terms (9 for PAD A and 27 for PAD B)

• Ability to decode up to 1 MB of address

t Microcontroller logic that eliminates the need for external “glue logic” has the following

features:

• Ability to interface to multiplexed buses

• Built-in address latches for multiplexed address/data bus

• ALE and Reset polarity are programmable (Reset polarity not programmable

on V-versions)

• Multiple configurations are possible for interface to many different microcontrollers

t Programmable power management with standby current as low as 1µA

(V versions only)

• CMiser bit—programmable option to reduce AC power consumption in memory

• Turbo Bit (ZPSD only)—programmable bit to reduce AC and DC power consumption

in the PADs

t Built-in security locks the device and PAD decoding configuration

t Wide Operating Voltage Range

• V-versions: 2.7 to 5.5 volts

• Others: 4.5 to 5.5 volts

t Available in a variety of packaging (44-pin PLDCC, CLDCC, and PQFP)

t Simple, menu-driven software (PSDsoft) allows configuration and design entry on a PC.

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