Datasheet
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VREGS1Register (Address: 0Eh—Default Value: 88h)
TPS65013
SLVS517A – AUGUST 2004 – REVISED JANUARY 2005
Bit 6-Bit 4 - CORE<2:0>: The following table shows all possible values of VCORE. The default value can
subsequently be overwritten via the serial interface after start-up.
CORE2 CORE1 CORE0 VCORE
0 0 0 0.85 V
0 0 1 1.05 V
0 1 0 1.1 V
0 1 1 1.2 V
1 0 0 1.3 V
1 0 1 1.4 V
1 1 0 1.5 V
1 1 1 1.6 V
Bit 3-Bit 2 - CORELP<1:0>: CORELP1, and CORELP0 can be used to set the VCORE voltage in low-power
mode. In low-power mode, CORE2 is effectively 0, and CORE1, CORE0 take on the values programmed at
CORELP1 and CORELP0, default 01 giving VCORE = 1.05 V as default in low-power mode. When low-power
mode is exited, VCORE reverts to the value set by CORE2, CORE1, and CORE0.
Bit 1 - VIB:
• 0 = disables the VIB output transistor.
• 1 = enables the VIB output transistor to drive the vibrator motor.
Bit 0 - CORE DISCHARGE:
• 0 = disables the active discharge of the VCORE converter output.
• 1 = enables the active discharge of the VCORE converter output in WAIT mode, or if VDCDC2 < 7 >= 1 in
LOW-POWER mode.
VREGS1 B7 B6 B5 B4 B3 B2 B1 B0
Bit name LDO2 enable LDO2 OFF / LDO21 LDO20 LDO1 enable LDO1 OFF / LDO11 LDO10
nSLP nSLP
Default 1 0 0 0 1 0 0 0
Read/write R/W R/W R/W R/W R/W R/W R/W R/W
The VREGS1 register is used to program and enable LDO1 and LDO2 and to set their behavior when low-power
mode is active. The LDO output voltages can be set either on the fly, while the relevant LDO is disabled, or
simultaneously when the relevant enable bit is set. Note that both LDOs are per default ON.
Bit 7-Bit 6 - The function of the LDO2 enable and LDO2 OFF/nSLP bits is shown in the following table. See the
power-on sequencing section for details of low-power mode.
LDO2 ENABLE LDO2 OFF / nSLP LDO STATUS IN NORMAL MODE LDO STATUS IN LOW-POWER MODE
0 X OFF OFF
1 0 ON, full power ON, reduced power / performance
1 1 ON, full power OFF
Bit 5-Bit 4 - LDO2<1:0>: LDO2 has a default output voltage of 1.8 V. If so desired, this can be changed at the
same time as it is enabled via the serial interface.
LDO21 LDO20 VLDO2
0 0 1.8 V
0 1 2.5 V
1 0 3.0 V
1 1 3.3 V
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