Siemens PANEL PC 877 operating instructions 17-50

Detailed descriptions 17.6 BIOS setup

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.
OnChip USB B	[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.
	[Disabled]	The interface is disabled, resources are released and can be used
		otherwise.
On-chip USB C	[Enabled]	On-chip USB C occupies PCI IRQ channel 3. On-chip USB C Port 5
		is located at the front interface socket X2034.
	[Disabled]	The interface is disabled, resources are released and can be used
		otherwise.
On-chip USB	[Enabled]	USB 2.0 is enabled for ports 0 to 5. OnChip USB 2.0 is allocated to
2.0		PCI IRQ channel 4.
		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.
	[Disabled]	The USB interfaces on port 0 to 5 support only USB 1.1 and occupy
		resources as described earlier.

17-50	SIMATIC Panel PC 877
	Operating instructions, Release 07/2006, A5E00877780-01