2.0
CRB Setup
2.1
CRB Configuration Setting Notes
Before powering on your board, review this guide, particularly this section.
The CRB schematics provide the ultimate definition of all HW configuration settings
and options. See the schematics Table of Contents for relevant pages.
The primary source for CRB board configuration and setup are header jumpers. The
critical jumper settings are defined in the schematics and are identified in this
document. Additionally the soft strapping options are available in the Intel
®
Communications Chipset 89xx Series Datasheet and the Intel
®
Xeon
®
and Intel
®
Core™ Processors For Communications Infrastructure External Design Specification.
Configuration jumpers can be changed without a rework, but you might need to
change jumper settings to perform specific functions. The processor and PCH strap
settings, and JTAG, SMBus, and other configurations may be changed through jumper
settings.
Note:
The CRB is shipped with jumpers in place and is ready to boot.
Note:
The CRB went through a series of burn-in tests before it was shipped.
An additional source for CRB configuration and setup options is via board-level stuffing
resistors. These settings may be visible via the CRB schematics. These stuffing
resistor settings should not be altered unless directed to do so by Intel; changes
require a board rework.
The processor straps start being latched when PLTRST#/CPUPWRGD are asserted by
the PCH. The latch in the processor closes approximately 250 ns after the de-asserting
edge of PLTRST#.
The PCH Functional Straps are used for static configuration. These straps are sampled
either at the rising edge of RSMRST# or PWROK, depending on the strap. These straps
select the required configurations and then revert to their normal pin usage.
Caution:
The following precautions will help promote safe and proper operation of the CRB:
•
Before connecting power, make sure the CRB is mounted on the provided stand-
offs to avoid accidental shorts.
•
The CRB is susceptible to damage by electrostatic discharge (ESD) that may result
in platform failure or unpredictable operation. Make sure you are in a static-free
work environment before removing components from their anti-static packaging.
•
Connecting the wrong cable, or reversing a cable, may damage the CRB or a
device being connected. Since the CRB is not in a protective chassis, use care
when connecting cables to the platform.
CRB Setup—Crystal Forest
Intel
®
Xeon
®
Processor E3-1125C with Intel
®
Communications Chipset 8910 Development Kit
October 2012
User Guide
Order No.: 328009-001US
21
