psd511b1 STMicroelectronics, psd511b1 Datasheet - Page 6

• Manufacturer Part Number: psd511b1
• Description: Low Cost Field Programmable Microcontroller Peripherals
• Manufacturer: STMicroelectronics

Introduction
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2.0
Key Features
The Power Management Unit (PMU) of the PSD5XX enables the user to control the
power consumption on selected functional blocks, based on system requirements. For
microcontrollers that do not generate a chip select input for the PSD, the Automatic
Power-Down (APD) unit of the PMU can be setup to enable the PSD to enter Power Down
or Sleep Mode, based on the inactivity of ALE (or AS).
Implementing your design has never been easier than with PSDsoft—WSI’s software
development suite. Using PSDsoft, you can do the following:
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Single-chip programmable peripheral for microcontroller-based applications
256K to 1 Mbit of UV EPROM with the following features:
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16 Kbits SRAM is configurable as 2K x 8 or 1K x 16. The access time can be
as quick as 70 ns, including address decoding. The contents of the SRAM can be
battery-backed by connecting a battery to the Vstby pin. The SRAM was also designed
using Zero-power technology
40 I/O pins (divided into five 8-bit ports) that can be individually configured for:
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Three Zero-power Programmable Logic Devices (ZPLDs): the Decode PLD (DPLD), the
General-purpose PLD (GPLD), and the Peripheral PLD (PPLD) can be used for:
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Microcontroller logic that eliminates the need for external “glue logic” has the following
features:
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Four 16-bit Counter/Timers that have five modes of operation and can be controlled by
the PPLD macrocells. Modes of operation are: pulse and waveform generation, time
capture, event counting, and a watchdog timer (real time clock).
Eight input priority encoded Interrupt Controller. Four interrupts are generated by
the PPLD and are user defined. The other four interrupts are generated by the
Counter/Timer’s terminal count flags. Each interrupt can be individually masked and
configured as edge or level sensitive.
Page logic is connected to the ZPLDs and expands the MCU address space to up to
16 times
Configure your PSD5XX to work with virtually any microcontroller
Specify what you want implemented in the programmable logic using a design file
Simulate your design
Download your design to the part using a programmer.
Configurable as 32, 64, or 128 K x 8; or as 16, 32, or 64 K x 16
Divided into four equally-sized mappable blocks for optimized address mapping
As fast as 70 ns access time, which includes address decoding
Built-in Zero-power technology
Standard MCU I/O
PLD/macrocell I/O
Latched address output
High-order address inputs
Special function I/O
Open-drain output
Up to 61 input and 140 output product terms
24 Macrocells and I/O
Decode up to 16 MB of address
State machines and state logic
Generate external signals (chip selects, bus interface, etc.)
Ability to interface to multiplexed and non-multiplexed buses
Built-in address latches for multiplexed address/data bus
ALE and Reset polarity are programmable
Multiple configurations are possible for interface to many different microcontrollers
PSD5XX Family
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