SMART 6806800K30J, Installation & Use Manual

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40 RTM-ATCA-F125 Installation and Use (6806800K30J)
Functional Description
Functional Description
4.3.3.1 I2C Bus
The SFP I2C bus signals (I2C_SDA and I2C_SCL) from each SFP site are individually
connected to the RTM FPGA. An I2C controller within the FPGA allows the front-blade
service processor to access these ports to obtain SFP status and diagnostic information.
Refer to
Section 4.6, FPGA on page 43
for details.
4.3.3.2 SFP Status Signals
The SFP status signals, MOD_ABS, TX_FAULT and LOS, are individually connected to the
RTM FPGA to allow monitoring by the service processor. Refer to the
Section 4.6, FPGA
on page 43
for details.
4.3.3.3 SFP Control Signals
The SFP control signals, TX_DISABLE and RATE_SEL, are individually connected to the
RTM FPGA to allow control by the service processor. Refer to the
Section 4.6, FPGA on
page 43
for details.
4.4 10Gbps SFP+ Ports
The RTM-ATCA-F125 provides a total of eight 10Gbps SFP+ module sites. Six of these
connect to the fabric switch on the front-blade and two to the base switch.
4.4.1 Connectivity
The eight 10Gbps XAUI ports from the front-blade connect to a pair of BCM8747 quad
XAUI-to-SFI phys which then connect to individual SFP+ connectors using an SFI interface
as shown in
Figure 4-3 .
Figure 4-3 Fabric 10 GB Interconnect