RT8884C Datasheet, PDF (13/46 Pages) Richtek Technology Corporation – Multi-Phase PWM Controller for CPU Core Power Supply

RT8884C
Code
00h
01h
02h
03h
04h
05h
06h
07h
08h to
1Fh
Table 2. Standard Serial VID Commands
Commands
Master
Payload
Contents
Slave
Payload
Contents
Description
not supported
N/A
N/A
N/A
SetVID_Fast VID code
1. Set new target VID code, VR jumps to new VID target
N/A
with controlled default “fast” slew rate 12.5mV/s.
2. Set VR_Settled when VR reaches target VID voltage.
SetVID_Slow VID code
1. Set new target VID code, VR jumps to new VID target
N/A
with controlled default “slow” slew rate 3.125mV/s.
2. Set VR_Settled when VR reaches target VID voltage.
SetVID_Decay VID code
1. 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.
N/A
2. Low side MOSFET is not allowed to sync current.
3. ACK 11b when target higher than current VOUT
voltage.
4. ACK 10b when target lower than current VOUT
voltage.
SetPS
1. Set power state.
Byte
indicating
power states
N/A
2. ACK 11b when not support.
3. ACK 10b even slave not change configuration.
4. ACK 11b for still running SetVID command.
5. VR remains in lower state when receiving SetVID
(decay).
SetRegADR
Pointer of
registers in
data table
1. Set the pointer of the data register.
N/A
2. ACK 11b for address outside of support.
3. NAK 01b for SetADR (all call).
SetReg DAT
New data
register
content
N/A
1. Write the contents to the data register.
2. NAK 01b for SetReg (all call).
GetReg
Specified
Register
Contents
1. Slave returns the contents of the specified register as
the payload.
2. ACK 11b for non support address.
3. NAK 01b for GetReg (all call).
not supported
N/A
N/A
N/A
Copyright ©2015 Richtek Technology Corporation. All rights reserved.
DS8884C-00 July 2015
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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