prcm-094
Start
SR power on reset
Device Power On
SmartReflex initialisation
Voltage processor
initialisation
Voltage controller
initialisation
SmartReflex initialisation
VDD1
switching?
Yes
No
Yes
No
Yes
No
Switch to
OPP100?
Switch from VDD1 OPP50
to VDD1 OPP100
Switch VDD1 Opps
Switch VDD2 Opps
Switch from VDD1 OPP100
to VDD1 OPP50
Switch to
OPP100?
Switch from VDD2 OPP50
to VDD2 OPP100
Switch from VDD2 OPP100
to VDD2 OPP50
Continue
the voltage
scaling?
End
Yes
No
Public Version
PRCM Use Cases and Tips
www.ti.com
Table 3-93. Data Composition for SmartReflex Voltage Control Registers (continued)
Bit
Function
Description
Reset Value
6:0
VSEL
Output voltage
0x30
Output voltage - VSEL * 12.5 mV + 0.6 V
According to the reset value of the register, the VDDx is active and set to 1.2 V, where x can be 1 or 2.
For more information about the TWL5030, see the TWL5030 technical reference manual.
3.7.1.3
DVFS Using SmartReflex
This use case describes the initialization sequence of the SmartReflex voltage control part of the device
and the TWL5030 power IC. It switches the OPP of the VDD1 and the VDD2 voltage channels (see
).
Figure 3-104. Device/TWL5030 SmartReflex DVFS Overview Flow Chart
450
Power, Reset, and Clock Management
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated