Functional Description
49
3.4
Board Interfaces on RTM
There are two identical USB interfaces on the CPCI-R3920(T)
RTM, each with a maximum transfer rate of 480 Mb!s provided for
connecting USB devices. One USB peripheral may be connected
to each port. To connect more USB devices than there are avail-
able ports, an external hub is required.
USB Connectors CN7-R and CN8-R
Table 3-17: RTM USB Connector Pin Definitions
Note:
The CPCI-R3920(T) host interfaces can be used with maxi-
mum 500 mA continuous load current as specified in the Uni-
versal Serial Bus Specification, Revision 2.0. Short-circuit
protection is provided. All the signal lines are EMI-filtered.
The Rear I/O interface supports the USB 1.1 and USB
2.0 standards. For USB 2.0 it is strongly recommended to
use a cable length not exceeding 3 meters.
Gigabit Ethernet Interfaces
Gigabit Ethernet signals are available either on the front R-J45
connector or on the Rear I/O interface due the implemented
switches on the cPCI-3920. Both Gigabit Ethernet channels are
individually switchable to front or Rear I/O. Switching over from
front to Rear I/O or vice versa is effected using the BIOS settings
or the board-specific registers (default: front I/O). For further infor-
mation on the BIOS settings, refer to Chapter BIOS.
The interfaces provide automatic detection and switching between
10Base-T, 100Base-TX and 1000Base-T data transmission (Auto-
Negotiation).
The CN6-R connector supplies the 10Base-T, 100Base-TX
and 1000Base-T interfaces to the Ethernet controller.
Pin # Signal Name
1
Vcc
2
UV0-
3
UV0+
4
GND
Summary of Contents for cPCI-3920 Series
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