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OR3LP26B

ORCA® OR3LP26B Field-Programmable System Chip (FPSC) Embedded Master/Target PCI Interface

Agere -> LSI Corporation 

ORCA OR3LP26B FPSC

Embedded Master/Target PCI Interface

Data Sheet

March 2000

Description (continued)

Following design entry, the development system’s map,

place, and route tools translate the netlist into a routed

FPSC. A static timing analysis tool is provided to deter-

mine device speed and a back-annotated netlist can be

created to allow simulation. Timing and simulation out-

put files from ORCA Foundry are also compatible with

many third-party analysis tools. Its bit stream generator

is then used to generate the configuration data which is

loaded into the FPSC’s internal configuration RAM.

When using the bit stream generator, the user selects

options that affect the functionality of the FPSC. Com-

bined with the front-end tools, ORCA Foundry pro-

duces configuration data that implements the various

logic and routing options discussed in this data sheet.

ORCA Series 3 FPGA logic consists of three basic ele-

ments: programmable logic cells (PLCs), programma-

ble input/output cells (PICs), and system-level features.

An array of PLCs is surrounded by PICs. Each PLC

contains a programmable function unit (PFU), a sup-

plemental logic and interconnect cell (SLIC), local rout-

ing resources, and configuration RAM. Most of the

FPGA logic is performed in the PFU, but decoders,

PAL-like functions, and 3-state buffering can be per-

formed in the SLIC. The PICs provide device inputs

and outputs and can be used to register signals and to

perform input demultiplexing, output multiplexing, and

other functions on two output signals. Some of the

system-level functions include the new microprocessor

interface (MPI) and the programmable clock manager

(PCM).

FPSC Design Kit

Development is facilitated by an FPSC Design Kit

which, together with ORCA Foundry and third-party

synthesis and simulation engines, provides all software

and documentation required to design and verify an

FPSC implementation. Included in the kit are the FPSC

Configuration Manager, Verilog * and VHDL* gate-level

structural netlists, all necessary synthesis libraries, and

complete online documentation. The kit's software cou-

ples with ORCA Foundry under the control of the

ORCA Foundry Control Center (OFCC), providing a

seamless FPSC design environment. More information

can be obtained by visiting the ORCA website or con-

tacting a local sales office, both listed on the last page

of this document.

FPGA Logic Overview

ORCA Series 3 FPGA logic is a new generation of

SRAM-based FPGA logic built on the successful Series

2 FPGA line from Lucent Technologies Microelectron-

ics Group, with enhancements and innovations geared

toward today’s high-speed designs and tomorrow’s sys-

tems on a single chip. Designed from the start to be

synthesis friendly and to reduce place and route times

while maintaining the complete routability of the ORCA

Series 2 devices, the Series 3 more than doubles the

logic available in each logic block and incorporates sys-

tem-level features that can further reduce logic require-

ments and increase system speed. ORCA Series 3

devices contain many new patented enhancements

and are offered in a variety of packages, speed grades,

and temperature ranges.

PLC Logic

Each PFU within a PLC contains eight 4-input (16-bit)

look-up tables (LUTs), eight latches/flip-flops (FFs),

and one additional flip-flop that may be used indepen-

dently or with arithmetic functions.

The PFU is organized in a twin-quad fashion: two sets

of four LUTs and FFs that can be controlled indepen-

dently. LUTs may also be combined for use in arith-

metic functions using fast-carry chain logic in either

4-bit or 8-bit modes. The carry-out of either mode may

be registered in the ninth FF for pipelining. Each PFU

may also be configured as a synchronous 32 x 4

single- or dual-port RAM or ROM. The FFs (or latches)

may obtain input from LUT outputs or directly from

invertible PFU inputs, or they can be tied high or tied

low. The FFs also have programmable clock polarity,

clock enables, and local set/reset.

The SLIC is connected to PLC routing resources and to

the outputs of the PFU. It contains 3-state, bidirectional

buffers and logic to perform up to a 10-bit AND function

for decoding, or an AND-OR with optional INVERT

(AOI) to perform PAL-like functions. The 3-state drivers

in the SLIC and their direct connections to the PFU out-

puts make fast, true 3-state buses possible within the

FPGA logic, reducing required routing and allowing for

real-world system performance.

* Verilog and VHDL are registered trademarks of Cadance Design

Systems, Inc.

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