Intel E5-1428L CM8062001144000 Data Sheet

Processors also include various other signals, including power / ground and sense

points. Details can be found in 

on page 23.

All V

CCD

, V

CCIN

, and V

CCIO_IN

, and V

CCPECI

 lands must be connected to their respective

processor power planes, while all V

SS

 lands must be connected to the system ground

plane.

For clean on-chip power distribution, processors include lands for all required voltage

supplies. These are listed in the following table.

V

CCIN

173

Each V

CCIN

 land must be supplied with the voltage determined

by the SVID Bus signals. 

on page 21 defines the

on page 33 and 

on page 35 represent V

CCIN

 static

and transient limits.

V

CCD_01

V

CCD_23

56

Each V

CCD

 land is connected to a switchable 1.20 V supply,

provide power to the processor DDR4 interface.
V

CCD

 is also controlled by the SVID Bus. V

CCD

 is the generic

term for V

CCD_01

 and V

CCD_23

.

V

CCIO_IN

1

IO voltage supply input

V

CCPECI

1

Power supply for PECI.

V

SS

631

Ground

Due to its large number of transistors and high internal clock speeds, the Intel

®

Xeon

®

 processor E5-1600 and E5-2600 v3 product families is capable of generating

large current swings between low and full power states. This may cause voltages on

power planes to sag below their minimum values if bulk decoupling is not adequate.

Large electrolytic bulk capacitors (CBULK), help maintain the output voltage during

current transients, for example coming out of an idle condition. Care must be taken in

the baseboard design to ensure that the voltages provided to the processor remain

on page 31. Failure to do so can result in

timing violations or reduced lifetime of the processor.

The reference voltage or the VID setting is set via the SVID communication bus

between the processor and the voltage regulator controller chip. The VID settings are

the nominal voltages to be delivered to the processor's V

CCIN

 lands. 

on page

21 specifies the reference voltage level corresponding to the VID value transmitted

over serial VID. The VID codes will change due to temperature and/or current load

changes in order to minimize the power and to maximize the performance of the part.

The specifications are set so that a voltage regulator can operate with all supported

frequencies.

Individual processor VID values may be calibrated during manufacturing such that two

processor units with the same core frequency may have different default VID settings.

Intel

®

 Xeon

®

 Processor E5-1600 and E5-2600 v3 Product Families, Volume 1 of 2, Electrical

September 2014

Datasheet

Order No.: 330783-001

17