TPS65910, TPS65910A, TPS65910A3, TPS659101, TPS659102, TPS659103
TPS659104, TPS659105, TPS659106, TPS659107, TPS659108, TPS659109
SWCS046N –MARCH 2010–REVISED APRIL 2012
www.ti.com
OPP5
Coarse steps (DVFS)
Fine steps (AVS)
OPP4
OPP3
OPP Change end
OPP2
OPP1
OPP Change start
TSR TI2C
TSMPS
TSR TI2C
TSMPS
TSR TI2C
TSMPS
TSR TI2C
TSMPS
SWCS046-012
(1) TSR: Time used by the SmartReflex controller
(2) TI2C: Time used for data transfer through the I2C interface
(3) TSMPS: Time required by the SMPS to converge to new voltage value
Figure 14. SmartReflex Operation Example
32-kHz RTC CLOCK
The TPS65910 device can provide a 32-kHz clock to the platform through the CLK32KOUT output, the source of
this 32-kHz clock can be:
•
•
•
32-kHz crystal connected from OSC32IN to OSC32KOUT pins
A square-wave 32-kHz clock signal applied to OSC32IN input (OSC32KOUT kept floating).
Internal 32-kHz RC oscillator, to reduce the BOM, if an accurate clock is not needed by the system.
Default selection of a 32-kHz RC oscillator versus 32-kHz crystal oscillator or external square-wave 32-kHz clock
depends on the Boot mode or device version (EEPROM programming):
•
•
BOOT1 = 0, BOOT0 = 1: quartz oscillator or external square wave 32-kHz clock default
BOOT1 = 0, BOOT0 = 0: 32-kHz RC oscillator default
Switching from the 32-kHz RC oscillator to the 32-kHz crystal oscillator or external square-wave 32-kHz clock
can also be programmed though DEVCTRL_REG register, taking benefit of the shorter turn-on time of the
internal RC oscillator.
Switching from the 32-kHz crystal oscillator or external square-wave clock to the RC oscillator is not supported.
46
Submit Documentation Feedback
Copyright © 2010–2012, Texas Instruments Incorporated
Product Folder Link(s): TPS65910 TPS65910A TPS65910A3 TPS659101 TPS659102 TPS659103 TPS659104
TPS659105 TPS659106 TPS659107 TPS659108 TPS659109
TI [ TEXAS INSTRUMENTS ]
