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
Page 12
