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Introduction

The ispGDX2? family is Lattice’s second generation in-system programmable generic digital crosspoint switch for high speed bus switching and interface applications.

The ispGDX2 family is available in two options. The standard device supports sysHSI capability for ultra fast serial communications while the lower-cost “E-series” supports the same high-performance FPGA fabric without the sysHSI Block.

This family of switches combines a flexible switching architecture with advanced sysIO interfaces including high performance sysHSI Blocks, and sysCLOCK PLLs to meet the needs of the today’s high-speed systems. Through a muliplexer-intensive architecture, the ispGDX2 facilitates a variety of common switching functions.

Features

■ High Performance Bus Switching

? High bandwidth

– Up to 12.8 Gbps (SERDES)

– Up to 38 Gbps (without SERDES)

? Up to 16 (15x10) FIFOs for data buffering

? High speed performance

– fMAX = 360MHz

– tPD = 3.0ns

– tCO = 2.9ns

– tS = 2.0ns

? Built-in programmable control logic capability

? I/O intensive: 64 to 256 I/Os

? Expanded MUX capability up to 188:1 MUX

■ sysCLOCK? PLL

? Frequency synthesis and skew management

? Clock multiply and divide capability

? Clock shifting up to +/-2.35ns in 335ps steps

? Up to four PLLs

■ sysIO? Interfacing

? LVCMOS 1.8, 2.5, 3.3 and LVTTL support for standard board interfaces

? SSTL 2/3 Class I and II support

? HSTL Class I, III and IV support

? GTL+, PCI-X for bus interfaces

? LVPECL, LVDS and Bus LVDS differential support

? Hot socketing

? Programmable drive strength

■ Two Options Available

? High-performance sysHSI (standard part number)

? Low-cost, no sysHSI (“E-Series”)

■ sysHSI Blocks Provide up to 16 High-speed Channels

? Serializer/de-serializer (SERDES) included

? Clock Data Recovery (CDR) built in

? 800 Mbps per channel

? LVDS differential support

? 10B/12B support

– Encoding / decoding

– Bit alignment

– Symbol alignment

? 8B/10B support

– Bit alignment

– Symbol alignment

? Source Synchronous support

■ Flexible Programming and Testing

? IEEE 1532 compliant In-System Programmability (ISP?)

? Boundary scan test through IEEE 1149.1 interface

? 3.3V, 2.5V or 1.8V power supplies

? 5V tolerant I/O for LVCMOS 3.3 and LVTTL interfaces