Data Sheet
March 2000
ORCA
®
OR3LP26B Field-Programmable System Chip (FPSC)
Embedded Master/Target PCI Interface
Introduction
Lucent Technologies Microelectronics Group has
developed a solution for designers who need the
many advantages of an FPGA-based design imple-
mentation, coupled with the high bandwidth of an
industry-standard PCI interface. The
ORCA
OR3LP26B (a member of the Series 3+ FPSC family)
provides a full-featured 33/50/66 MHz, 32-/64-bit PCI
interface, fully designed and tested, in hardware, plus
FPGA logic for user-programmable functions.
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Four internal FIFOs individually buffer both direc-
tions of both the Master and Target interfaces:
— Both Master FIFOs are 64 bits wide by 32 bits
deep.
— Both Target FIFOs are 64 bits wide by 16 bits
deep.
Capable of no-wait-state, full-burst PCI transfers in
either direction, on either the Master or Target
interface. The dual 64-bit data paths extend into
the FPGA logic, permitting full-bandwidth, simulta-
neous bidirectional data transfers of up to
528 Mbytes/s to be sustained indefinitely.
Can be configured to provide either two 64-bit
buses (one in each direction) to be multiplexed
between Master and Target, or four independent
32-bit buses.
Provides many hardware options in the PCI core
that are set during FPGA logic configuration.
Operates within the requirements of the PCI 5 V
and 3.3 V signaling environments and 3.3 V com-
mercial environmental conditions, allowing the
same device to be used in 5 V or 3.3 V PCI sys-
tems.
FPGA is reconfigurable via the PCI interface's con-
figuration space (as well as conventionally), allow-
ing the FPGA to be field-updated to meet late-
breaking requirements of emerging protocols.
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PCI Bus Core Highlights
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Implemented in an
ORCA
Series 3 OR3L125B
base array, displacing the bottom ten rows of 28
columns.
Core is a well-tested ASIC model.
Fully compliant to Revision 2.2 of PCI Local Bus
specification.
Operates at PCI bus speeds up to 66 MHz on a
32-/64-bit wide bus.
Comprises two independent controllers for Master
and Target.
Meets/exceeds all requirements for
PICMG
*
Hot
Swap friendly silicon, full Hot Swap model, per the
CompactPCI
*
Hot Swap specification,
PICMG
2.1
R1.0.
PCI SIG Hot Plug (R1.0) compliant.
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*
PICMG
and
CompactPCI
are registered trademarks of the PCI
s
Industrial Computer Manufacturers Group.
Table 1.
ORCA
OR3LP26B PCI FPSC Solution—Available FPGA Logic
Device
OR3LP26B
Usable Gates
†
60K—120K
Number of Number of Max User Max User
LUTs
Registers
RAM
I/Os
4032
5304
64K
259
Array
Size
18 x 28
Number of
PFUs
504
† The embedded core and interface comprise approximately 85K standard-cell ASIC gates in addition to these usable gates. The usable
gate counts range from a logic-only gate count to a gate count assuming 30% of the PFUs/SLICs being used as RAMs. The logic-only
gate count includes each PFU/SLIC (counted as 108 gates per PFU/SLIC), including 12 gates per LUT/FF pair (eight per PFU), and 12
gates per SLIC/FF pair (one per PFU). Each of the four PIOs per PIC is counted as 16 gates (two FFs, fast-capture latch, output logic,
CLK drivers, and I/O buffers). PFUs used as RAM are counted at four gates per bit, with each PFU capable of implementing a 32 x 4
RAM (or 512 gates) per PFU.
AGERE [ AGERE SYSTEMS ]
