Sfp+ Status Signals; Sfp Control Signals; Phy Management Interfaces; 10Gbps Fabric Ports - SMART Embedded Computing RTM-ATCA-F140 Series Installation & Use Manual

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
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
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.
Table 4-7
PHY
Addr
High
Bits
b1011
4.5

10Gbps Fabric Ports

The RTM-ATCA-F140 provides four 10Gbps SFP+ module sites connected to the fabric
switch on the front blade.
60
BCM8727 PHY Addressing
PHY
Addr
Channel Source
Low
Bits
1 Base b0
2 Base b1
RTM-ATCA-F140 Series Installation and Use (6806800M97M)
PHY Switch
SFP+ Port
Addr Port
22 BIX_XG1 Base SFP+ 2
23 BIX_XG0 Base SFP+ 1
Functional Description
FPGA on page 67
for
FPGA on page 67
Management
Channel
BIX_XG_MDC/
MDIO