AU80610004653AAS LBMG Intel, AU80610004653AAS LBMG Datasheet - Page 17

• Manufacturer Part Number: AU80610004653AAS LBMG
• Description: MPU, ATOM PROCESSOR, N450, FC-BGA8
• Manufacturer: Intel
• Series: ATOM - N400r

Specifications of AU80610004653AAS LBMG

• Core Size: 64bit
• Cpu Speed: 1.66GHz
• Digital Ic Case Style: BGA
• No. Of Pins: 559
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Processor Configuration Registers
1.2.1.4
1.2.1.5
1.2.1.6
Datasheet
Table 1-2. Extended System BIOS Area Memory Segments
Table 1-3. System BIOS Area Memory Segments
Extended System BIOS Area (E_0000h-E_FFFFh)
This 64-KB area (000E_0000h – 000E_FFFFh) is divided into four, 16-KB segments.
Each segment can be assigned independent read and write attributes so it can be
mapped either to main DRAM or to DMI. Typically, this area is used for RAM or ROM.
Memory segments that are disabled are not remapped elsewhere.
Non-snooped accesses from PCI Express or DMI to this region are always sent to
DRAM.
System BIOS Area (F_0000h-F_FFFFh)
This area is a single, 64-KB segment (000F_0000h – 000F_FFFFh). This segment can
be assigned read and write attributes. It is by default (after reset) Read/Write disabled
and cycles are forwarded to DMI. By manipulating the Read/Write attributes, the IMC
can “shadow” BIOS into the main DRAM. When disabled, this segment is not remapped.
Non-snooped accesses from PCI Express or DMI to this region are always sent to
DRAM.
Programmable Attribute Map (PAM) Memory Area Details
The 13 sections from 768 KB to 1 MB comprise what is also known as the PAM Memory
Area.
The IMC does not handle IWB (Implicit Write-Back) cycles targeting DMI. Since all
memory residing on DMI should be set as non-cacheable, there normally will not be
IWB cycles targeting DMI.
However, DMI becomes the default target for CPU and DMI originated accesses to
disabled segments of the PAM region. If the MTRRs covering the PAM regions are set to
WB or RC it is possible to get IWB cycles targeting DMI. This may occur for DMI
originated cycles to disabled PAM regions.
Memory Segments
Memory Segments
0E0000H - 0E3FFFH
0E4000H - 0E7FFFH
0E8000H - 0EBFFFH
0EC000H - 0EFFFFH
0F0000H - 0FFFFFH
Attributes
Attributes
WE
W/R
W/R
W/R
W/R
RE
BIOS Extension
BIOS Extension
BIOS Extension
BIOS Extension
Comments
Comments
BIOS Area
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