RT8859M
Table 2. Serial VID Command
Master Payload
Slave Payload
Contents
Code
Commands
Description
Contents
00h
Not Supported
SetVID_Fast
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.
Set new target VID code, VR jumps to new
VID target with controlled default “slow” slew
rate 3.125mV/μs.
Set new target VID code, VR jumps to new
VID target, but doest not control the slew
rate. The output voltage decays at a rate
proportional to the load current
01h
02h
VID code
VID code
N/A
SetVID_Slow
N/A
N/A
03h
SetVID_Decay
VID code
Byte indicating
power states
04h
05h
06h
07h
SetPS
N/A
N/A
N/A
Set power state
Pointer of
registers in data
table
New data register
content
SetRegADR
SetRegDAT
GetReg
Set the pointer of the data register
Write the contents to the data register
Pointer of
registers in data
table
Specified
register
contents
Slave returns the contents of the specified
register as the payload.
08h
-
Not Supported
N/A
N/A
N/A
1Fh
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16
DS8859M-05 July 2012
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
