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

Page: 57 / 82

Functional Description
RTM-ATCA-F140 Series Installation and Use (6806800M97M) 57
The following table shows the SFP connector pin assignments.
4.3.3.1 I
2
C Bus
The SFP I
2
C bus signals (I2C_SDA and I2C_SCL) from each SFP site are individually
connected to the RTM FPGA. An I
2
C controller within the FPGA allows the front blade
service processor to access these ports to obtain SFP status and diagnostic information.
Refer to the
FPGA on page 67
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
FPGA on page 67
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
FPGA on page 67
for
details.
4.4 10Gbps SFP+ Ports
The RTM-ATCA-F140 provides two 10Gbps SFP+ module sites connected to the base
switch on the front blade.
Table 4-5 SFP Connector Pin Assignment
Pin Signal Pin Signal
1 GND 11 GND
2 TX_FAULT 12 RX-
3 TX_DISABLE 13 RX+
4 I2C_SDA 14 GND
5 I2C_SCL 15 VCCr (+3.3V)
6 MOD_ABS 16 VCCt (+3.3V)
7 RATE_SEL 17 GND
8 LOS 18 TX+
9 GND 19 TX-
10 GND 20 GND