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2018
congatec
AG
TR44m17
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9
System Resources
9.1
I/O Address Assignment
The I/O address assignment of the conga-TR4 module is functionally identical with a standard PC/AT.
The BIOS assigns PCI and PCI Express I/O resources from FFF0h downwards. Non PnP/PCI/PCI Express compliant devices must not consume
I/O resources in that area.
9.1.1
LPC Bus
On the conga-TR4, the PCIExpress Bus acts as the subtractive decoding agent. All I/O cycles that are not positively decoded are forwarded to
the PCIExpress Bus—not the LPC Bus. Only specified I/O ranges are forwarded to the LPC Bus.
On the conga-TR4, the following I/O address ranges are sent to the LPC Bus:
SupperIO Index 2Eh-2Fh
SerialPort0 3F8h-3FFh
SerialPort1 2F8h-2FFh
SerialPort2 3F0h-3F7h
SerialPort3 3E0h-3E7h
SerialPort4 2F0h-2F7h
SerialPort5 2E0h-2E7h
SerialPort6 3E8h-3EFh
SerialPort7 2E8h-2EFh
KbcPort 60h, 64h
BoardController E00h-FFFh
Some of these ranges are not available if a Super I/O is used on the carrier board or if they are occupied by the COMExpress on-module UARTs
(they can be enabled in BIOS setup). The I/O range E38h-EBFh is always used by on-module LPC devices. Otherwise, the ranges listed above
are available for customer use.
If you require additional LPC Bus resources other than those mentioned above, or more information about this subject, contact congatec
technical support for assistance.
