Siemens PANEL PC 877 User Manual
Detailed descriptions
17.6 BIOS setup
SIMATIC Panel PC 877
17-50
Operating instructions, Release 07/2006, A5E00877780-01
Entry
Meaning
On-chip USB A [Enabled]
On-chip USB A determines the function of USB ports 0 and 1. On-
chip USB A occupies PCI IRQ Channel 1. On-chip USB A port 0 is
located on the front interface socket X44, port 1 on the bottom of the
device rear X36. Users cannot edit this value.
[Enabled]
On-chip USB B determines the function of USB ports 2 and 3. On-
chip USB B occupies PCI IRQ Channel 2. On-chip USB B port 3 is
located on internal X2033. Port 2 is located on the bottom of the
device rear X36.
OnChip USB B
[Disabled]
The interface is disabled, resources are released and can be used
otherwise.
[Enabled]
On-chip USB C occupies PCI IRQ channel 3. On-chip USB C Port 5
is located at the front interface socket X2034.
On-chip USB C
[Disabled]
The interface is disabled, resources are released and can be used
otherwise.
[Enabled]
USB 2.0 is enabled for ports 0 to 5. OnChip USB 2.0 is allocated to
PCI IRQ channel 4.
Accessible are only the the USB ports 1 and 2 on the top/bottom of
Accessible are only the the USB ports 1 and 2 on the top/bottom of
the rear panel of the device, or USB 5 on the front panel.
On-chip USB
2.0
[Disabled]
The USB interfaces on port 0 to 5 support only USB 1.1 and occupy
resources as described earlier.