SMART Embedded Computing RTM-ATCA-F140 Series, Installation & Use Manual

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60 RTM-ATCA-F140 Series Installation and Use (6806800M97M)
Functional Description
Functional Description
4.4.6.2 SFP+ Status Signals
The SFP+ status signals, MOD_ABS, TX_FAULT and LOS, are individually connected to
the corresponding BCM8727 which monitors them. The signals are also connected to the
RTM FPGA to allow fast detection of a loss of signal condition. Refer to
FPGA on page 67
for further details.
4.4.6.3 SFP Control Signals
The SFP+ TX_DISABLE signals are individually connected to the corresponding BCM8727
which drives them under software control.
The RS0 and RS1 rate select signals from each SFP+ are individually connected to the
RTM FPGA that allows them to be controlled by software. Refer to
FPGA on page 67
for
further details.
4.4.6.4 PHY Management Interfaces
The BCM8727 provides a single MDC/MDIO management port to access both channels
and allows bit 0 of the PHY address for each channel to be individually programmed, with
bits 1 - 4 being common. The next table shows the address allocation and management
port definition for each channel.
4.5 10Gbps Fabric Ports
The RTM-ATCA-F140 provides four 10Gbps SFP+ module sites connected to the fabric
switch on the front blade.
Table 4-7 BCM8727 PHY Addressing
PHY
Addr
High
Bits
Channel Source
PHY
Addr
Low
Bits
PHY
Addr
Switch
Port
SFP+ Port
Management
Channel
b1011
1 Base b0 22 BIX_XG1 Base SFP+ 2 BIX_XG_MDC/
MDIO
2 Base b1 23 BIX_XG0 Base SFP+ 1