Features
Offset/
Section
# of
Bits
Function
Notes
Examples
Part Numbers
54-5Ah
5B-62h
63-64h
65h
56
Processor Family Number
Processor SKU Number
Reserved
Seven 8-bit ASCII characters
Seven 8-bit ASCII characters
Reserved for future use
1 byte checksum
AT80604
003771AA
0000h
64
16
8
Checksum
Add up by byte and take 2’s
complement.
Thermal Reference
1
66h
8
Recommended THERMALERT_N
assertion threshold value
MSB is Reserved
MSB is Reserved
0h = 0C
1
67h
68h
8
8
Thermal calibration offset value
0h = 0C
1
T
Maximum
Maximum case temperature
Two 4-bit hex digits (mV)
69h = 69°C
CASE
1
69-6Ah
6Bh
16
8
Thermal Design Power
Checksum
Four 4-bit hex digits (in Watts)
1 byte checksum
0130h = 130 Watts
Add up by byte and take 2’s
complement.
Features
6C-6Fh
32
8
Processor Core Feature Flags
Processor Feature Flags
From CPUID function 1, EDX
contents
4387FBFFh
10001101
70h
Eight features - Binary
1 indicates functional feature
71h
72
8
Additional Processor Feature
Flags
Eight additional features - Binary
1 indicates functional feature
01110101
6/2
4/4
Multiprocessor Support
00b = UP, 01b = DP, 10b = S2S,
11b = MP/SMS
00000011 = MP/SMS
1
73h
Number of Devices in TAP Chain
First four bits reserved
One 4-bit hex digit - Bits
*0h
74-75h
76h
16
8
Reserved
Reserved for future use
1 byte checksum
0000h
Checksum
Add up by byte and take 2’s
complement.
Other
77-7Eh
64
8
Processor Serial/Electronic
Signature
Coded binary
N/A
7Fh
Checksum
1 byte checksum
Add up by byte and take 2’s
complement.
Notes:
1. Uses Binary Coded Decimal (BCD) translation.
7.3.2
Scratch EEPROM
Also available in the memory component on the processor SMBus is an EEPROM which
may be used for other data at the system or processor vendor’s discretion. The data in
this EEPROM, once programmed, can be write-protected by asserting the active-high
SM_WP signal. This signal has a weak pull-down (10 kΩ) to allow the EEPROM to be
programmed in systems with no implementation of this signal. The Scratch EEPROM
resides in the upper half of the memory component (addresses 80 - FFh). The lower
half comprises the Processor Information ROM (addresses 00 - 7Fh), which is
permanently write-protected by Intel.
148
Datasheet Volume 1 of 2
INTEL [ INTEL ]
