Artesyn RTM ATCA-F140 Installation and Use (July 2014) - Manual (Page 43)

Functional Description
RTM-ATCA-F140 Installation and Use (6806800M97F) 43
4.5.5 BCM84754 Status
The LASI signals from each BCM84754 port are individually connected to the RTM FPGA to
allow them to be monitored by software. The LASI signals can also generate an interrupt to the
front blade. Refer to
Chapter 4, GPS Connectors, on page 48 for further details.
4.5.6 Fabric SFP+ Connection
This is the same as the base SFP+ connection. Refer to Chapter 4, SFP+ Connection, on page 40 .
4.5.6.1 SFP+ I2C Bus
The SFP+ I2C bus signals (I2C_SDA and I2C_SCL) from each SFP+ site are individually connected
to the BCM84754 which includes a mechanism to allow access to the port through the PHY
management channel.
4.5.6.2 SFP+ Status Signals
The SFP+ status signals, MOD_ABS, TX_FAULT and LOS, are individually connected to the
BCM84754 which monitors them. The signals are also connected to the RTM FPGA to allow fast
detection of a loss of signal condition. Refer to
Chapter 4, GPS Connectors, on page 48 for
further details.
4.5.6.3 SFP+ Control Signals
The SFP+ TX_DISABLE signal is individually connected to the BCM84754 which drives it under
software control.
The RS0 and RS1 rate select signals from each SFP+ that are tied together and connected to the
RTM FPGA that allows them to be controlled by software. Refer to
Chapter 4, GPS Connectors,
on page 48 for further detail.