Intel III Xeon 550 MHz 80525KY550512 User Manual
Product codes
80525KY550512
Pentium
®
III Xeon™ Processor at 500 and 550 MHz
Datasheet
41
4.3.1
Processor Information ROM
An electrically programmed read-only memory with information about the Pentium
III
Xeon
processor is provided on the processor substrate. This information is permanently write-protected.
shows the data fields and formats provided in the memory.
Table 23. Processor Information ROM Format (Sheet 1 of 2)
Offset/Section
# of Bits
Function
Notes
HEADER: 00h
8
Data Format Revision
Two 4-bit hex digits
01h
16
EEPROM 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
L2 Cache Data Address
Byte pointer, 00h if not present
06h
8
SEC Cartridge 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
Addres
Addres
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
0Bh
16
Reserved
Reserved for future use
0Dh
8
Checksum
1 byte checksum
PROCESSOR: 0Eh
48
S-spec/QDF Number
Six 8-bit ASCII characters
2
Sample/Production
00b = Sample only
6
Reserved
Reserved for future use
8
Checksum
1 byte checksum
CORE: 16h
2
Processor Core Type
From CPUID
4
Processor Core Family
From CPUID
4
Processor Core Model
From CPUID
4
Processor Core Steppin
From CPUID
42
Reserved
Reserved for future use
16
Maximum Core Frequency
16-bit binary number (in MHz)
16
Core Voltage ID
Voltage in mV
8
Core Voltage Tolerance, Hig
Edge finger tolerance in mV, +
8
Core Voltage Tolerance, Low
Edge finger tolerance in mV,
8
Reserved
Reserved for future use
8
Checksum
1 byte checksum
L2 CACHE: 25h
32
Reserved
Reserved for future use
16
L2 Cache Size
16-bit binary number (in Kbytes
4
Number of SRAM Components
One 4-bit hex digit
4
Reserved
Reserved for future use
16
L2 Cache Voltage ID
Voltage in mV