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Intel C2518 FH8065501516710 Data Sheet

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FH8065501516710
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Volume 2—Multi-Core Intel
®
 Atom™ Processors—C2000 Product Family
CPUID Instruction and SoC Identification
Intel
®
 Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 1 of 3
September 2014
52
Order Number: 330061-002US
2.5
CPUID Instruction and SoC Identification
The CPUID Instruction returns the processor identification and feature information in 
the EAX, EBX, ECX, and EDX registers. The instruction is described as CPUID—CPU 
Identification in Volume 2 of the Intel
®
 64 and IA-32 Architectures Software 
Developer’s Manual.
For additional guidance, Intel offers Application Note 485 - Intel Processor 
Identification and the CPUID Instruction, Document No. 241618. This document is 
available through the local Intel sales representative.
Leaf 1 (EAX =1) of the CPUID returns the processor model, family, and stepping IDs as 
well as the processor features supported. 
 show 
these fields for the SoC B0 and earlier steppings.
Table 2-1.
Intel
®
 Turbo Boost Core Frequency Overview
SoC
TDP 
Frequency
Number of Cores Active (i.e., not in C6)
1
2
3
4
5
6
7
8
C2750
2.4
2.6
2.6
2.6
2.6
2.6
2.6
2.6
2.6
C2730
1.7
2.4
2.4
2.3
2.3
2.2
2.2
2
2
C2550
2.4
2.6
2.6
2.6
2.6
x
x
x
x
C2530
1.7
2.4
2.4
2
2
x
x
x
x
C2350
1.7
2
2
x
x
x
x
x
x
Table 2-2.
CPUID Leaf 1 Instruction - EAX and EBX Registers
Bit Field
Value
Description
Notes
EAX[31:0:] - Identity
31:28
0
Reserved
Family 6, Model 4Dh
Intel
®
 Atom
TM
 processor family 
using the 22nm process
27:20
0
Extended Family ID
19:16
4
Extended Model ID
15:14
0
Reserved
13:12
0
Processor Type ID
11:8
6
Family ID
7:4
Dh
Model ID
3:0
0
Processor Stepping ID
EBX[31:0:] - Identity and Features
31:24
Assigned
Local APIC ID
ID assigned to the Local APIC for 
each processor thread during power-
up.
23:16
10h
Maximum number logical processor IDs in SoC
The maximum range of APIC IDs 
that can be assigned.
All SKUs have the same value.
15:8
08h
CLFLUSH instruction cache line size
In 8-byte increments:
8 x 8 = 64 bytes
7:0
0
Brand ID feature supported
Not supported