Detailed Description

20. VITA 57.1 FMC LPC Connector

The ML605 implements both the High Pin Count (HPC, J64) and Low Pin Count (LPC, J63) connector options of VITA 57.1.1 FMC specification. This section discusses the FMC LPC J63 connector.

The FMC standard calls for two connector densities: a High Pin Count (HPC) and a Low

Pin Count (LPC) implementation. A common 10 x 40 position (400 pin locations) connector form factor is used for both versions. The HPC version is fully populated with 400 pins present, and the LPC version is partially populated with 160 pins.

The 10 x 40 rows of a FMC LPC connector provides connectivity for:

68 single-ended or 34 differential user defined signals

1 MGT

1 MGT clock

2 differential clocks

61 ground, 10 power connections

Of the above signal and clock connectivity capability, the ML605 implements the full set:

34 differential user-defined pairs:

34 LA pairs

1 MGT

1 MGT clock

2 differential clocks

Signaling Speed Ratings:

Single-ended: 9 GHz / 18 Gb/s

Differential

Optimal Vertical: 9 GHz / 18 Gb/s

Optimal Horizontal: 16 GHz / 32 Gb/s

High Density Vertical 7 GHz / 15 Gb/s Mechanical specifications:

Samtec SEAM/SEAF Series

1.27mm x 1.27mm (0.050" x 0.050") pitch

The Samtec connector system is rated for signaling speeds up to 9 GHz (18 Gb/s) based on a -3 dB insertion loss point within a two-level signaling environment.

Note: The ML605 board VADJ voltage for the FMC HPC and LPC connectors (J64 and J63) is fixed at 2.5V (non-adjustable). The 2.5V rail cannot be turned off. The ML605 VITA 57.1 FMC interfaces are compatible with 2.5V mezzanine cards capable of supporting 2.5V VADJ.

ML605 Hardware User Guide

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UG534 (v1.2.1) January 21, 2010

 

 

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Xilinx ML605 manual Vita 57.1 FMC LPC Connector, Detailed Description