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Chapter:
Connectors
USB 1 to 4, LAN, Sound
page 24 embedded-logic
PB945+
4.8 USB 1 to 4, LAN, Sound
USB 1-4, LAN and sound are provided via a standard IDC socket connector with a spacing of 2.54 mm.
Necessary settings can be accomplished in BIOS setup.
All USB-channels support USB 2.0. You may note that the setting of USB keyboard or USB mouse
support in the BIOS-setup is only necessary and advisable, if the OS offers no USB-support. BIOS-setup
can be changed with an USB keyboard without enabling USB keyboard support. Running Windows with
these features enabled may lead to significant performance or functionality limitations.
Every USB interface provides up to 500 mA current and is protected by an electronical fuse.
The LAN-interface on this connector supports 10BaseT and 100BaseT compatible net components with
automatic bandwidth selection. Additional signals are provided for status LEDs. Auto-negate and auto-
cross functionality is available, PXE and RPL are available on request.
Additionally on this plug one can also find signals for audio input and output. There are two ways to use
these signals. Default functionality is the familiar audio in, audio out, and microphone. OS dependent
device drivers can switch these signals to support an 5.1 output; thus in this mode no audio input signals
are available.
Signals "SPDIFI" and "SPDIFO" provide digital input and output. If a transformation to a coaxial or optical
connector is necessary this must be performed externally.
Description
Name
Pin
Name
Description
5 volt for USB1
USB1 VCC
1
2
USB2 VCC
5 volt for USB2
USB- channel 1
USB1#
3
4
USB2#
USB- channel 2
USB+ channel 1
USB1
5
6
USB2
USB+ channel 2
ground
GND
7
8
GND
ground
USB+ channel 3
USB3
9
10
USB4
USB+ channel 4
USB- channel 3
USB3#
11
12
USB4#
USB- channel 4
5 volt for USB3
USB3 VCC
13
14
USB4 VCC
5 volt for USB4
LAN activity
ACTLED
15
16
SPEEDLED LAN 10/100 speed
LAN RX+
LANRX
17
18
LANTX
LAN TX+
LAN RX-
LANRX#
19
20
LANTX#
LAN TX-
digital output SPDIF
SPDIFO
21
22
3.3V
3.3 volt supply
digital input SPDIF
SPDIFI
23
24
S_AGND
analog ground sound
sound output right /
frond output right
LOUT_R /
FRONT_R
25
26
LOUT_L /
FRONT_L
sound output left /
frond output left