AU80610004653AAS LBMG Intel, AU80610004653AAS LBMG Datasheet - Page 19

• 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
1.2.2.2
1.2.2.3
Datasheet
Table 1-4. Pre-allocated Memory Example for 64-MB DRAM, 1-MB VGA,
Video accelerators originally used this hole. It is also used for validation by customer
teams for some of their test cards. That is why it is being supported. There is no
inherent BIOS request for the 15-MB to 16-MB window.
TSEG
TSEG is optionally 1 MB, 2 MB, or 8 MB in size. TSEG is below IGD stolen memory,
which is at the top of physical memory. SMM-mode CPU accesses to enabled TSEG
access the physical DRAM at the same address. Non-CPU originated accesses are not
allowed to SMM space. PCI Express, DMI, and Internal Graphics originated cycles to
enabled SMM space are handled as invalid cycle type with reads and writes to location 0
and byte enables turned off for writes. When the extended SMRAM space is enabled,
CPU accesses to the TSEG range without SMM attribute or without WB attribute are also
forwarded to memory as invalid accesses (see
cycles that target TSEG space are completed to DRAM for cache coherency. When SMM
is enabled the maximum amount of memory available to the system is equal to the
amount of physical DRAM minus the value in the TSEG register which is fixed at 1 MB,
2 MB or 8 MB.
Pre-allocated Memory
Voids of physical addresses that are not accessible as general system memory and
reside within system memory address range (< TOLUD) are created for SMM-mode and
legacy VGA graphics compatibility. It is the responsibility of BIOS to properly initialize
these regions.
enable and disable these ranges are described in the processor Control Register Device
0 (GGC).
and 1-MB TSEG
0000_0000h –
03DF_FFFFh
03E0_0000h –
03EF_FFFFh
03F0_0000h –
03FF_FFFFh
Segments
Memory
Table 1-4
SMM Mode Only -
Attributes
CPU Reads
details the location and attributes of the regions. How to
R/W
R/W
Available System Memory 62 MB
TSEG Address Range & Pre-allocated Memory
Pre-allocated Graphics VGA memory.
1 MB (or 4/8/16/32/64 MB) when IGD is enabled
Table
1-5). Non-SMM-mode Write Back
Comments
19