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A
S
BOUT THE
ERVER
S210-MBT2W S3 Switch Circuit
S3 will be required to supported all SKUs. So, the build option
(two zero resistors unstuffed) are removed from board design.
All external USB ports must be capable of waking up the sys-
tem from the S3 state.
VREF Calibration Circuit
The Romley Platform requires the use of "Digitally Controlled
Potentiometers" to allow BIOS to program the memory VREF
voltage level for optimized memory interface timings and guard-
band.
The S210-MBT2W Server products, require the use of four of
these "Digitally Controlled Potentiometer" circuits, one circuit
per memory quadrant.
The recommended circuit is illustrated below for
DDR3 VREF Circuit Implementation
1-24
VREF C
C
ALIBRATION
IRCUIT
reference:
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