Rj-45 Console And I²C Interface - Nvidia Spectrum SN2000 Hardware User Manual

Pin Symbol Name
10 VeeR
11 VeeR
12 RD-
13 RD+
14 VeeR
15 VccR
16 VccT
17 VeeT
18 TD+
19 TD-
20 VeeT
Notes:
a. TFAULT is an open collector/drain output, which should be pulled up with a 4.7k-10k
Ohms resistor on the host board if intended for use. Pull up voltage should be between
2.0V to Vcc + 0.3V. A high output indicates a transmitter fault caused by either the TX
bias current or the TX output power exceeding the preset alarm thresholds. A low
output indicates normal operation. In the low state, the output is pulled to <0.8V.
b. Laser output disabled on TDIS >2.0V or open, enabled on TDIS <0.8V
c. Should be pulled up with 4.7kΩ-10kΩ on host board to a voltage between 2.0V and
3.6V. MOD_ABS pulls line low to indicate module is plugged in.
d. LOS is open collector output. Should be pulled up with 4.7kΩ-10kΩ on host board to a
voltage between 2.0V and 3.6V. Logic 0 indicates normal operation; logic 1 indicates
loss of signal.
RJ-45 CONSOLE and I²C Interface

RJ-45 Console and I²C interfaces are integrated in the same connector. Due to that,
connecting any cable other than the Mellanox supplied console cable may cause an
I²C hang.
Using uncertified cables may damage the I²C interface. Refer to
Ordering Numbers appendix for harness details.
Signal
Not connected
I²C_SCL
TXD
Not connected
Receiver Ground (Common with Transmitter Ground)
Receiver Ground (Common with Transmitter Ground)
Receiver Inverted DATA out. AC Coupled
Receiver Non-inverted DATA out. AC Coupled
Receiver Ground (Common with Transmitter Ground)
Receiver Power Supply
Transmitter Power Supply
Transmitter Ground (Common with Receiver Ground)
Transmitter Non-Inverted DATA in. AC Coupled
Transmitter Inverted DATA in. AC Coupled
Transmitter Ground (Common with Receiver Ground)
1
2
3
4
Description
the Replacement Parts
Pin#
G/W
G
O/W
Bl
Note
a
a
--
--
a
--
--
a
--
--
a
Color
85