Copyright
©
2014
congatec
AG
TA30m16
62/95
9
System Resources
9.1
I/O Address Assignment
The I/O address assignment of the conga-TCA3 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-TCA3, the Platform Controller Hub (PCH) acts as the subtractive decoding agent. All I/O cycles that are not positively decoded
are forwarded to the PCH and the LPC Bus. Some fixed I/O space ranges seen by the processor are:
Device
IO Address
8259 Master
20h-21h, 24h-25h, 28h-29h, 2Ch-2Dh, 30h-31h, 34h-35h, 38h-39h, 3Ch-3Dh
8254s
40h-43h, 50h-53h
Ps2 Control
60h, 64h
NMI Controller
61h, 63h, 65h, 67h
RTC
70h-77h
Port 80h
80h-83h
Init Register
92h
8259 Master
A0h- A1h, A4h-A5h, A8h-A9h, Ach-ADh, B0h-B1h, B4h-B5h, B8h-B9h, Bch-BDh, 4D0h-4D1h
PCU UART
3F8h-3FFh
Reset Control
CF9h
Active Power Management
B2h-B3h
Some of these ranges are used by a Super I/O if implemented on the carrier board or are occupied by the COM Express on-module UARTs if
these are enabled in the setup. If you require additional LPC Bus resources other than those mentioned above, or more information about this
subject, contact congatec technical support for assistance.
