ZPSD301 datasheet(7/85 Pages) STMICROELECTRONICS

7 / 85 page

PSD3XX Family

3.0

Key Features

t Single-chip programmable peripheral for microcontroller-based applications

t 256K to 1 Mbit of UV EPROM with the following features:

• Configurable as 32, 64, or 128 K x 8; or as 16, 32, or 64 K x 16

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

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

t Optional 16 Kbit SRAM is configurable as 2K x 8 or 1K x 16. The access time can be

as quick as 70 ns, including 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

• Open-drain or CMOS output

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

the following features:

• Up to 18 Inputs and 24 outputs

• 40 Product terms (13 for PAD A and 27 for PAD B)

• Ability to decode up to 1 MB of address without paging

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

features:

• Ability to interface to multiplexed and non-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 Optional built-in page logic expands the MCU address space by up to 16 times

t Programmable power management with standby current as low as 1µA for low-voltage

version

• 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 Track Mode that allows other microcontrollers or host processors to share access to the

local data bus

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, TQFP, and PQFP)

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

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