Specifications

Chapter 3 Hardware
ReadyBoard 800 Reference Manual 43
• Supports four-pair, 100 ohm, Category 5 UTP (Unshielded Twisted Pair) wiring
Tables 3-13 describes the pin-outs and signals of Gigabit Ethernet port, Ethernet Port 2.
Table 3-13. Ethernet Port 2 Pin/Signal Descriptions (J17)
Pin # Signal Description
1MDI0+
2MDI0-
Media Dependent Interface [0] – In MDI* configuration (1000BaseT), MDI[0]+/-
corresponds to BI_DA+/-, and in MDI-X* configuration, MDI[0]+/- corresponds to
BI_DB+/-. In MDI configuration (10BaseT or 100BaseT-TX), MDI[0]+/- is used for
transmit pair, and in MDI-X configuration, MDI[0]+/- is used for the receive pair.
3MDI1+
6MDI1-
Media Dependent Interface [1] – In MDI configuration (1000BaseT), MDI[1]+/-
corresponds to BI_DB+/-, and in MDI-X configuration, MDI[1]+/- corresponds to
BI_DA+/-. In MDI configuration (10BaseT or 100BaseT-TX), MDI[1]+/- is used for
transmit pair, and in MDI-X configuration, MDI[1]+/- is used for the receive pair.
4MDI2+
5MDI2-
Media Dependent Interface [2] – In MDI configuration (1000BaseT), MDI[2]+/-
corresponds to BI_DC+/-, and MDI-X configuration, MDI[2]+/- corresponds to
BI_DD+/-. The 10BaseT or 100BaseT-TX are not used in this MDI pair.
7MDI3+
8MDI3-
Media Dependent Interface [3] – In MDI configuration (1000BaseT), MDI[3]+/-
corresponds to BI_DD+/-, and MDI-X configuration, MDI[3]+/- corresponds to
BI_DC+/-. The 10BaseT or 100BaseT-TX are not used in this MDI pair.
CT CTap Center Tap Ground – Goes to ground through 75 ohm resistor and 1.0 nF capacitor.
11 Speed Speed LED – This signal line is shared with 1000BaseT and 100BaseT. The
10BaseT speed is indicated when no indication is seen for any activity.
12, 14 VCC3 LED Power – This voltage (+3.3 volts) is for plus side of both LEDs.
13 Link Link/Activity LED – This signal indicates a Link is established or Activity is
occurring over the port.
15, 16 GND Shield Ground
Notes: The shaded area denotes power or ground. * MDI (medium dependent interface) is an
Ethernet port connection that allows network hubs or switches to connect to other hubs or switches
without a crossover cable. A medium dependent interface is also referred to as an MDI port or an
uplink port. **MDI-X (or MDIX), short for medium dependent interface crossover (the “X”
representing “crossover”), is an Ethernet port connection that allows networked end stations (i.e.,
PCs or workstations) to connect to each other using a crossover cable. MDIX is also referred to as
an MDIX port.