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50 www.xilinx.com SP605 Hardware User Guide
UG526 (v1.1.1) February 1, 2010
Chapter 1: SP605 Evaluation Board
18. VITA 57.1 FMC LPC Connector
The SP605 implements the Low Pin Count (LPC, J2) connector option of the VITA 57.1.1
FMC specification.
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 SP605 implements the full set:
• 34 differential user-defined pairs
♦ 34 LA pairs
• 1 MGT
• 1 MGT clock
• 2 differential clocks
Note:
The SP605 board VADJ voltage for the FMC LPC connector J2 is fixed at 2.5V (non-
adjustable). The 2.5V rail cannot be turned off. The SP605 VITA 57.1 FMC interfaces are compatible
with 2.5V mezzanine cards capable of supporting 2.5V VADJ.