Lenovo LF80565QH0254M Datenblatt Seite 119

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Document Number: 318080-002 119
Features
7.4.3 Processor Information ROM (PIROM)
The lower half (128 bytes) of the SMBus memory component is an electrically
programmed read-only memory with information about the processor. This information
is permanently write-protected. Table 7-6 shows the data fields and Section 7.4.3
provides the formats of the data fields included in the Processor Information ROM
(PIROM).
The PIROM consists of the following sections:
•Header
Processor Data
Processor Core Data
•Cache Data
•Package Data
Part Number Data
Thermal Reference Data
Feature Data
Other Data
Table 7-6. Processor Information ROM Data Sections (Sheet 1 of 3)
Offset/Section
# of
Bits
Function Notes
Header:
00h 8 Data Format Revision Two 4-bit hex digits
01 - 02h 16 PIROM Size Size in bytes (MSB first)
03h 8 Processor Data Address Byte pointer, 00h if not present
04h 8 Processor Core Data
Address
Byte pointer, 00h if not present
05h 8 L3 Cache Data Address Byte pointer, 00h if not present
06h 8 Package Data Address Byte pointer, 00h if not present
07h 8 Part Number Data Address Byte pointer, 00h if not present
08h 8 Thermal Reference Data
Address
Byte pointer, 00h if not present
09h 8 Feature Data Address Byte pointer, 00h if not present
0Ah 8 Other Data Address Byte pointer, 00h if not present
0B - 0Ch 16 Reserved Reserved
0Dh 8 Checksum 1 byte checksum
Processor Data:
0E - 13h 48 S-spec Number Six 8-bit ASCII characters
14h 6
2
Reserved
Sample/Production
Reserved (most significant bits)
00b = Sample, 01b = Production
15h 8 Checksum 1 byte checksum
Processor Core
Data:
16 - 19h 2 Reserved Reserved for future use
8 Extended Family From CPUID
4 Extended Model From CPUID
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