Intel C2518 FH8065501516710 Data Sheet
Product codes
FH8065501516710
Volume 2—System Address Maps—C2000 Product Family
I/O Address Space
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
180
Order Number: 330061-002US
10.2
I/O Address Space
There are 64 KB + 3 bytes of I/O space (0h-10002h) for accessing I/O registers in the
I/O space. Most I/O registers exists for legacy functions in the PCU or for the integrated
PCI devices, while some are claimed by the SoC transaction router to allow for external
access to the PCI configuration space registers.
10.2.1
SoC Transaction Router I/O Map
The SoC claims I/O transactions for the two 32-bit registers at port CF8h and CFCh
used by the software to access the PCI configuration space.
10.2.2
I/O Fabric I/O Map
10.2.2.1
PCU Fixed I/O Address Ranges
shows the fixed I/O space ranges seen by a processor.
Table 10-4. Fixed I/O Map (Sheet 1 of 2)
Start
End
Target
for I/O Reads
Target
for I/O Writes
Disable
20h
21h
8259 PIC
8259 PIC
No
24h
25h
8259 PIC
8259 PIC
No
28h
29h
8259 PIC
8259 PIC
No
2Ch
2Dh
8259 PIC
8259 PIC
No
30h
31h
8259 PIC
8259 PIC
No
34h
35h
8259 PIC
8259 PIC
No
38h
39h
8259 PIC
8259 PIC
No
3Ch
3Dh
8259 PIC
8259 PIC
No
40h
42h
8254 PIT
8254 PIT
No
43h
43h
None
8254 PIT
No
50h
53h
8254 PIT
8254 PIT
No
60h
60h
PS/2 Legacy Keyboard/
Mouse Control
PS/2 Legacy Keyboard/Mouse
Control
No
61h
61h
NMI Controller
NMI Controller
No
63h
63h
NMI Controller
NMI Controller
Yes, alias to
61h
64h
64h
PS/2 Legacy Keyboard/
Mouse Control
PS/2 Legacy Keyboard/Mouse
Control
No
65h
65h
NMI Controller
NMI Controller
Yes, alias to
61h
67h
67h
NMI Controller
NMI Controller
Yes, alias to
61h
70h
70h
None
NMI and RTC
No
71h
71h
RTC
RTC
No
72h
72h
RTC
NMI and RTC
Yes, w/ 73h
73h
73h
RTC
RTC
Yes, w/ 72h,
74h
74h
RTC
NMI and RTC
No
75h
75h
RTC
RTC
No