Intel C2550 FH8065401488912 Hoja De Datos
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FH8065401488912
Volume 2—Power Management—C2000 Product Family
Serial Voltage Identification (sVID) Controller
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 2 of 3
September 2014
158
Order Number: 330061-002US
Table 9-5.
sVID Commands
Command
Command
Code
Send
Payload
Receive
Payload
Description
Not Supported
Reserved
00h
(Extended
Command)
SetVID_Fast
01h
VID
n/a
Sets the new VID target. VR Jumps to the new VID
target with controlled (up or down) slew rate
programmed by the VR. When the VR receives a VID
Moving Up command it exits all low-power states to
the normal state to ensure the fastest slew to the
new voltage. VR sets VR_settled bit and issues alert
when VR has reached new VID target.
SetVID_Slow
02h
VID
n/a
Sets the VID target. VR Jumps to new VID target
with controlled slew rate (up or down) programmed
by the VR. SetVID-Slow is 4x slower than SetVID-
fast. When VR receives a VID Moving Up command it
exits all low-power states to the normal state to
ensure the fastest slew to the new voltage. VR sets
VR_settled and issues alert when VR has reached
new VID target.
SetVID_Decay
03h
VID
n/a
Sets the VID target. VR jumps to new VID target, but
does not control the slew rate, the output voltage
decays at a rate proportional to the load current.
SetVID_Decay is only used in VID down direction. VR
sets VR_settled bit is set, but alert line is not
asserted for SetVID-decay.
SetPS
04h
Power State
(PS)
n/a
Sends information based on the CPU power state to
the VR controller so it configures the VR to improve
efficiency, especially at light load.
SetRegADR
05h
VR Register
Address
n/a
Sets the address pointer in the data register table.
Typically the Next command SetRegDAT is the
payload that gets loaded into this address. However,
for multiple writes to the same address, only one
SetRegADR is needed.
SetRegDAT
06h
VR Register
Data
n/a
Writes the contents to the data register that was
previously identified by the address pointer with
SetRegADR.
GetReg
07h
VR Register
Address
VR
Register
Data
Slave returns the specified register contents as the
payload. The majority of the VR monitoring data is
accessed through the GetReg command.
Test_Mode
08h
Vendor Defined
Reserved
08h
through
1Fh
Slave returns a Reject acknowledgment.