FMC-4SFP+ - User’s Manual
9
1.
Introduction
This chapter describes the general characteristics and main features of the
CAEN ELS FMC-SFP mezzanine cards.
1.1
FMC-SFP Overview
The CAEN ELS FMC-SFP is a standard FPGA Mezzanine Card (FMC) Low
Pin Count (LPC) daughter board that allows to communicate up to 4 high speed hot-
swappable SFP+ devices. The board is available in two different versions:
•
FMC-4SFP+
version: with 4 fast SFP/SFP+ channels, without front panel;
•
FMC-2SFP+
version: with 2 fast SFP/SFP+ channels, with standard FMC
bezel.
The board is electrically compliant to the FMC standard (ANSI/VITA 57.1). All
module pins are translated to the FMC carrier voltage VADJ that can be in the range
from 1.5V to 3.3V. With its low operation voltage it can be used on almost all carriers.
The module is compatible with LPC and HPC carrier boards.
The components are placed to be compatible also with carriers that have
components under the FMC module. The SFP+ cages are placed to fi all carriers without
front panel modifications.
The module mounts an oscillator chip that can be configured using the I2C-
controlled LVDS (Low Voltage Differential Signaling) interface. The start-up
frequency could be also decided using a DIP switch present on the board (Autonomous
Mode). The operating frequency range of the chis is from 10 MHz up to 280 MHz.
