
Lattice Semiconductor
ORCA ORT8850 Data Sheet
3
Embedded Core Features
Implemented in an
ORCA Series 4 FPGA.
Allows a wide range of high-speed backplane applications, including SONET transport and termination.
No knowledge of SONET/SDH needed in generic applications. Simply supply data, 78 MHz—106 MHz clock,
and a frame pulse.
High-Speed Interface (HSI) function for clock/data recovery serial backplane data transfer without external
clocks.
Eight-channel HSI function provides 850 Mbits/s serial interface per channel for a total chip bandwidth of 6.8
Gbits/s (full duplex).
HSI function uses Lattice’s 850 Mbits/s serial interface core. Rates from 126 Mbits/s to 850 Mbits/s are sup-
ported.
LVDS I/Os compliant with
EIA
-644 support hot insertion. All embedded LVDS I/Os include both input and output
on-board termination to allow long-haul driving of backplanes.
Low-power 1.5 V HSI core.
Low-power LVDS buffers.
Programmable STS-3, and STS-12 framing.
Independent STS-3, and STS-12 data streams per quad channels.
8:1 data multiplexing/demultiplexing for 106.25 MHz byte-wide data processing in FPGA logic.
On-chip, Phase-Lock Loop (PLL) clock meets (type B) jitter tolerance specication of ITU-T recommendation
G.958.
Powerdown option of HSI receiver on a per-channel basis.
HSI automatically recovers from loss-of-clock once its reference clock returns to normal operating state.
Frame alignment across multiple ORT8850 devices for work/protect switching at OC-192/STM-64 and above
rates.
In-band management and conguration through transport overhead extraction/insertion.
Supports transparent modes where either the only insertion is A1/A2 framing bytes, or no bytes are inserted.
Streamlined pointer processor (pointer mover) for 8 kHz frame alignment to system clocks.
Built-in boundry scan (
IEEE
1149.1 JTAG).
FIFOs align incoming data across all eight channels (two groups of four channels or four groups of two channels)
for both SONET scrambling. Optional ability to bypass alignment FIFOs.
1 + 1 protection supports STS-12/STS-48 redundancy by either software or hardware control for protection
switching applications. STS-192 and above rates are supported through multiple devices.
ORCA FPGA soft intellectual property core support for a variety of applications.
Programmable Synchronous Transport Module (STM) pointer mover bypass mode.
Programmable STM framer bypass mode.
Programmable Clock and Data Recovery (CDR) bypass mode (clocked LVDS High-Speed Interface).
Redundant outputs and multiplexed redundant inputs for CDR I/Os allow for implementation of eight channels
with redundancy on a single device.