System Resources; I/O Address Assignment; Lpc Bus - Congatec COM Express conga-TC87 User Manual

10

System Resources

10.1

I/O Address Assignment

The I/O address assignment of the conga-TC87 module is functionally identical with a standard PC/AT.
Note
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.
10.1.1

LPC Bus

On the conga-TC87, the PCI Express Bus acts as the subtractive decoding agent. All I/O cycles that are not positively decoded are forwarded to
the internal PCI Bus not the LPC Bus. Only specified I/O ranges are forwarded to the LPC Bus. In the congatec Embedded BIOS, the following
I/O address ranges are sent to the LPC Bus:
Parts of these ranges are not available if a Super I/O is used on the carrier board. If a Super I/O is not implemented on the carrier board,
then these ranges 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.
Copyright © 2013 congatec AG
2Eh – 2Fh
4Eh – 4Fh
60h, 64h
A00h – BFFh
C00h – CFFh (always used internally)
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