Datasheet

Functional Description
Intel® Xeon® Processor D-1500 Product Family 171
Datasheet - Volume 1 of 4: Integrated Platform Controller Hub
March 2015
1. The Flash signature selects Descriptor Mode as well as verifies if the flash is
programmed and functioning. The data at the bottom of the flash (offset 10h) must
be 0FF0A55Ah in order to be in Descriptor mode.
2. The Descriptor map has pointers to the other five descriptor sections as well as the
size of each.
3. The component section has information about the SPI flash in the system
including: the number of components, density of each, illegal instructions (such as
chip erase), and frequencies for read, fast read and write/erase instructions.
Figure 3-13. Flash Descriptor Sections
Descriptor
MAP
Component
Signature
Region
Master
Soft Straps
4KB
Management
Engine VSCC
Table
Descriptor
Upper MAP
OEM Section
Reserved
10 h