User guide

ADM-XRC-5T2-ADV User Manual
ADM-XRC-5T2-ADV User Manual
4.7.2.1. Important Notes on using Optical Modules
Optical modules provide a signal (‘sense_l’) indicating that they are present; however the
presence of optical modules cannot be distinguished from a copper connection by relying on
this signal alone.
Whilst the optical module supplies are disabled by default and protected by current limiting,
the method shown in the example code should always be used to ensure that supplies do not
drive into the short circuit presented when a copper cable is fitted.
Caution
This equipment uses Class 1 Laser devices; such devices are not considered to be
hazardous when used for their intended purpose. Use of controls, adjustments or
performance of procedures other than those specified herein may result in hazardous
laser light exposure.
4.7.3. Example Gigabit I/O Applications
• Dual Infiniband 4x ( 4 lanes at 2.5Gb/s over copper or optical fibre)
• Dual 10Gb/s Ethernet CX4 ( 4 lanes at 3.125Gb/s over copper or optical fibre)
• Dual 10Gb/s FibreChannel ( 4 lanes at 3.1875Gb/s over copper or optical fibre)
• Dual 4 x OC-48 SONET
4.7.4. Front Panel multi-gigabit I/O Control & Status Signals
Signal Pin
Location
Description
BREFCK_ENA
B
AC38 -high to enable the 156.25MHz oscillator on the
board (pull-up on board)
STATUS_1 AC40 -Infiniband STATUS led (yellow) connector 1
ATTEN_1 AM42 -Infiniband ATTEN led (green) connector 1
STATUS_2 AC39 -Infiniband STATUS led (yellow) connector 2
ATTEN_2 AM41 -Infiniband ATTEN led (green) connector 2
Table 7 Board Control Signals
Signal FCN Pin Connector 1 (J5)
FPGA Pin
Connector 2 (J4)
FPGA Pin
Description
SENSE G7 AR5 AM6 low indicates that an opto module
has been fitted
FAULT G6 AT6 AN5 low indicates that no data detected
on the opto Rx channel
ODIS G2 AT7 AN6 low to disable Tx on any module
fitted on the channel
PSUEN G8 (3V3
Pwr)
AP7 AP6 high to enable the opto power
supply
OC_L - AP5 AL7 low indicates overcurrent on opto
supply
Table 8 Optical Module Control Signals
Version 1.0
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