
Lattice Semiconductor
5
Data Sheet
January 25, 2002
8b/10b SERDES Backplane Interface FPSC
ORCA ORT82G5 1.0-1.25/2.0-2.5/3.125-3.5 Gbits/s
Programmable Features
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High-performance programmable logic:
— 0.16 m 7-level metal technology.
— Internal performance of >250 MHz.
— Over 400k usable system gates.
— Meets multiple I/O interface standards.
— 1.5 V operation (30% less power than 1.8 V oper-
ation) translates to greater performance.
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Traditional I/O selections:
— LVTTL and LVCMOS (3.3 V, 2.5 V, and 1.8 V)
I/Os.
— Per pin-selectable I/O clamping diodes provide
3.3 V PCI compliance.
— Individually programmable drive capability:
24 mA sink/12 mA source, 12 mA sink/6 mA
source, or 6 mA sink/3 mA source.
— Two slew rates supported (fast and slew-limited).
— Fast-capture input latch and input ip-op
(FF)/latch for reduced input setup time and zero
hold time.
— Fast open-drain drive capability.
— Capability to register 3-state enable signal.
— Off-chip clock drive capability.
— Two-input function generator in output path.
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New programmable high-speed I/O:
— Single-ended: GTL, GTL+, PECL, SSTL3/2
(class I and II), HSTL (Class I, III, IV), ZBT, and
DDR.
— Double-ended: LVDS, bused-LVDS, and LVPECL.
Programmable, (on/off) internal parallel termina-
tion (100 ) is also supported for these I/Os.
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New capability to (de)multiplex I/O signals:
— New DDR on both input and output at rates up to
350 MHz (700 MHz effective rate).
— New 2x and 4x downlink and uplink capability per
I/O (i.e., 50 MHz internal to 200 MHz I/O).
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Enhanced twin-quad programmable function unit
(PFU):
— Eight 16-bit look-up tables (LUTs) per PFU.
— Nine user registers per PFU, one following each
LUT, and organized to allow two nibbles to act
independently, plus one extra for arithmetic oper-
ations.
— New register control in each PFU has two inde-
pendent programmable clocks, clock enables,
local set/reset, and data selects.
— New LUT structure allows exible combinations of
LUT4, LUT5, new LUT6, 4 → 1 MUX, new
8 → 1 MUX, and ripple mode arithmetic functions
in the same PFU.
— 32 x 4 RAM per PFU, congurable as single- or
dual-port. Create large, fast RAM/ROM blocks
(128 x 8 in only eight PFUs) using the SLIC
decoders as bank drivers.
— Soft-wired LUTs (SWL) allow fast cascading of up
to three levels of LUT logic in a single PFU
through fast internal routing which reduces rout-
ing congestion and improves speed.
— Flexible fast access to PFU inputs from routing.
— Fast-carry logic and routing to all four adjacent
PFUs for nibble-wide, byte-wide, or longer arith-
metic functions, with the option to register the
PFU carry-out.
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Abundant high-speed buffered and nonbuffered rout-
ing resources provide 2x average speed improve-
ments over previous architectures.
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Hierarchical routing optimized for both local and glo-
bal routing with dedicated routing resources. This
results in faster routing times with predictable and
efcient performance.
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SLIC provides eight 3-statable buffers, up to a 10-bit
decoder, and PAL-like and-or-invert (AOI) in each
programmable logic cell.
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New 200 MHz embedded quad-port RAM blocks,
2 read ports, 2 write ports, and 2 sets of byte lane
enables. Each embedded RAM block can be cong-
ured as:
— 1—512 x 18 (quad-port, two read/two write) with
optional built in arbitration.
— 1—256 x 36 (dual-port, one read/one write).
— 1—1k x 9 (dual-port, one read/one write).
— 2—512 x 9 (dual-port, one read/one write for
each).
— 2 RAMS with arbitrary number of words whose
sum is 512 or less by 18 (dual-port, one read/one
write).
— Supports joining of RAM blocks.
— Two 16 x 8-bit content addressable memory
(CAM) support.
— FIFO 512 x 18, 256 x 36, 1k x 9, or dual 512 x 9.
— Constant multiply (8 x 16 or 16 x 8).
— Dual variable multiply (8 x 8).
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Embedded 32-bit internal system bus plus 4-bit par-
ity interconnects FPGA logic, microprocessor inter-
face (MPI), embedded RAM blocks, and embedded
standard cell blocks with 100 MHz bus performance.
Included are built-in system registers that act as the
control and status center for the device.