Scratch Eeprom; Intel - Intel BX80569Q9550 - Core 2 Quad 2.83 GHz Processor Datasheet

System Management Bus Interface
Table 6-1. Processor Information ROM Data (Sheet 6 of 6)
Sec # Offset Field Name
114 72h Processor Core Feature
115 73h
116 74h
117 75h
RESERVED
(Intel® Itanium®
Processor 9500 Series)
118 76h RESERVED
119 77h
120 78h Package Feature Flags
121 79h
122 7Ah RESERVED
123 7Bh Number of Devices in
TAP Chain
124 7Ch Checksum
125 7Dh RESERVED
126 7Eh
127 7Fh
6.2.2

Scratch EEPROM

®

Intel

Itanium
support a Scratch EEPROM section, which may be used for other data at the system
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.
® ®
Intel Itanium Processor 9300 Series and 9500 Series Datasheet
Data Type
8 digit Hex
Flags number
Hex
Hex
Hex
Hex
Hex
Hex
®
Processor 9300 Series and Intel
Description
Features
From CPUID
Reserved for future use (Intel®
Itanium® Processor 9500 Series)
Reserved for future use
Bit[7:4] reserved
Bit[3] = THERMALERT_N
threshold values present
Bit[2] = SCRATCH EEPROM
present
Bit[1] = Core VID present
Bit[0] reserved
where a 1 indicates valid data
Reserved for future use
Bits [7:4] Number Devices in
processor TAP chain
Bits [3:0] Reserved
Add up by byte and take 2's
complement
Other
Reserved for future use
®
Itanium
Example
Flag = 0x4387FBFF
72h = 0xFF
73h = 0xFB
74h = 0x87
75h = 0x43
(Intel® Itanium®
Processor 9300 Series)
72h = 0x00
73h = 0x00
74h = 0x00
75h = 0x00
(Intel® Itanium®
Processor 9500 Series)
76h = 0x00
77h = 0x00
Flag = 0x000E
78h = 0x0E
79h = 0x00
7Ah = 0x00
5 devices for Intel®
Itanium® Processor
9300 Series = 0x50
9 devices for Intel®
Itanium® Processor
9500 Series = 0x90
7Dh = 0x00
7Eh = 0x00
7Fh = 0x00
®
Processor 9500 Series
149