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Datasheet 83
System Management Feature Specifications
09h 8 Feature Data Address Byte pointer, 00h if not present 67h
0Ah 8 Other Data Address Byte pointer, 00h if not present 7Ah
0Bh 16 Reserved Reserved for future use 0000h
0Dh 8 Checksum 1 byte checksum Add up by byte and
take 2’s complement.
Processor
0Eh 48 S-spec Number Six 8-bit ASCII characters S-spec number of S123
would be:
• 13h = 00h
• 12h = 00h
• 11h = “3”
• 10h = “2”
•0Fh = “1”
•0Eh = “S”
14h 2 Sample/Production 00b = Sample only (MSB First) 00000001b =
Production
15h 8 Reserved Reserved for future use 00h
16h 8 Checksum 1 byte checksum Add up by byte and
take 2’s complement.
Core
17h 8 Architecture Revision From CPUID
1
Taken from
CPUID[3].archrev.
18h 8 Processor Core Family From CPUID Taken from
CPUID[3].family.
19h 8 Processor Core Model From CPUID Taken from
CPUID[3].model.
1Ah 8 Processor Core Stepping From CPUID Taken from
CPUID[3].revision.
1Bh 24 Reserved Reserved for future use 000000h
1Eh 16 Maximum Core Frequency Four 4-bit hex digits (in MHz) 1 GHz = 1000h
2
20h 12 Maximum System Bus
Frequency
Three 4-bit hex digits (in MHz) 200 MHz = 200h
1
22h 16 Core Voltage ID Voltage in four 4-bit hex digits
(in mV)
1500 mV = 1500h
1
24h 8 Core Voltage Tolerance,
High
Edge finger tolerance in mV, +
two 4-bit hex digits
1.5% = 22 mV = 22h
1
25h 8 Core Voltage Tolerance,
Low
Edge finger tolerance in mV, –
two 4-bit hex digits
1.5% = 22 mV = 22h
1
26h 8 Reserved Reserved for future use 00h
27h 8 Checksum 1 byte checksum Add up by byte and
take 2’s complement.
Cache
28h 32 Reserved Reserved for future use 00000000h
2Ch 16 Cache Size Four 4-bit hex digits (in Kbytes) 3072 Kbytes = 3072h
1
2Eh 64 Reserved Reserved for future use x0h
36h 8 Checksum 1 byte checksum
Table 6-4. Processor Information ROM Format (Sheet 2 of 4)
Offset/
Section
# of
Bits
Function Notes Examples