RT8876A
Table 2. Serial VID Command
Master Payload
Slave Payload
Contents
Code
Commands
Description
Contents
00h
Not Supported
N/A
N/A
N/A
Set new target VID code, VR jumps to
new VID target with controlled default
“fast” slew rate 12.5mV/μs.
01h
02h
SetVID_Fast
SetVID_Slow
VID code
VID code
N/A
Set new target VID code, VR jumps to
new VID target with controlled default
“slow” slew rate 3.125mV/μs.
N/A
N/A
Set new target VID code, 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
03h
SetVID_Decay
VID code
Byte indicating power
states
Pointer of registers in
data table
New data register
content
04h
05h
06h
SetPS
N/A
N/A
N/A
Set power state
SetRegADR
SetRegDAT
Set the pointer of the data register
Write the contents to the data register
Specified
register
contents
Pointer of registers in
data table
Slave returns the contents of the
specified register as the payload.
07h
GetReg
08h
-
Not Supported
N/A
N/A
N/A
1Fh
Copyright 2012 Richtek Technology Corporation. All rights reserved.
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is a registered trademark of Richtek Technology Corporation.
DS8876A-02 October 2012
www.richtek.com
13
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