Datasheet

Register and Memory Mapping
Intel
®
Atom™ Processor E6xx Series Datasheet
56
Note: All accesses to addresses within the main memory range will be forwarded to the DRAM
unless they fall into one of the optional ranges specified in this section.
Note: Boot with the LPC interface is not validated.
5.3.1 I/O Map
The I/O map is divided into separate types. Fixed ranges cannot be moved, but some
may be disabled, while variable ranges can be moved.
5.3.1.1 Fixed I/O Address Range
Table 37 shows the fixed I/O decode ranges from the CPU perspective.
High BIOS FFC00000 FFFFFFFF
The Chipset Microcode (CMC) base
address lives within the LPC space
and consumes 64 kB of space.
Make sure to avoid using the
same starting address for other
LPC devices in the system.
Configurable Main Memory Configuration Spaces
PCI Express* Port 0 Anywhere in 32-bit range Configured via D23:F0:MB/ML
PCI Express* Port 0
(prefetchable)
Anywhere in 32-bit range Configured via D23:F0:PMB/PML
PCI Express* Port 1 Anywhere in 32-bit range Configured via D24:F0:MB/ML
PCI Express* Port 1
(prefetchable)
Anywhere in 32-bit range Configured via D24:F0:PMB/PML
PCI Express* Port 2 Anywhere in 32-bit range Configured via D25:F0:MB/ML
PCI Express* Port 2
(prefetchable)
Anywhere in 32-bit range Configured via D25:F0:PMB/PML
PCI Express* Port 3 Anywhere in 32-bit range Configured via D26:F0:MB/ML
PCI Express* Port 3
(prefetchable)
Anywhere in 32-bit range Configured via D26:F0:PMB/PML
Root Complex Base
Register
16 kB anywhere in the 32 bit range Configured via D31:F0:RCBA
Intel
®
High Definition
Audio
β
16 kB anywhere in 32-bit range
Configured via
D27:F0:LBAR/UBAR
Display 512 kB anywhere in 32-bit range Configured via D3:F0:MMBAR
Table 36. Memory Map (Sheet 2 of 2)
Device Start Address End Address Comments
Table 37. Fixed I/O Range Decoded by the Processor (Sheet 1 of 2)
I/O Address Read Target Write Target Can be disabled?
20h-3Ch 8259 Master 8259 Master No
40h-53h 8254 8254 No
61h-67h NMI Controller NMI Controller No
70h None NMI and RTC No
71h RTC RTC No
72h RTC NMI and RTC Yes, with 73h
73h RTC RTC Yes, with 72h