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Customer Configuration (CCFG)

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9.1.1.1 MODE_CONF_1 Register (Offset = FACh) [reset = FFFBFFFFh]

MODE_CONF_1 is shown in Figure 9-1 and described in Table 9-2.

Mode Configuration 1

Figure 9-1. MODE_CONF_1 Register

31 30 29 28 27 26 25 24

RESERVED EXT_32KHZ_CLK_DIO

R/W-3h R/W-3Fh

23 22 21 20 19 18 17 16

ALT_DCDC_VMIN ALT_DCDC_DI ALT_DCDC_IPEAK

THER_EN

R/W-Fh R/W-1h R/W-3h

15 14 13 12 11 10 9 8

DELTA_IBIAS_INIT DELTA_IBIAS_OFFSET

R/W-Fh R/W-Fh

7 6 5 4 3 2 1 0

XOSC_MAX_START

R/W-FFh

Table 9-2. MODE_CONF_1 Register Field Descriptions

Bit Field Type Reset Description

31-30 RESERVED R/W 3h

Software should not rely on the value of a reserved. Writing any

other value than the reset value may result in undefined behavior.

29-24 EXT_32KHZ_CLK_DIO R/W 3Fh

Unsigned integer, selects which DIO is used to supply external

32kHz clock for SCLK_LF when MODE_CONF.SCLK_LF_OPTION

is set to EXTERNAL. DIO configuration must not be overwritten by

any other system drivers.

23-20 ALT_DCDC_VMIN R/W Fh

Minimum voltage for when DC/DC should be used if alternate

DC/DC setting is enabled

(SIZE_AND_DIS_FLAGS.DIS_ALT_DCDC_SETTING=0). Voltage =

(28 + ALT_DCDC_VMIN) / 16. 0: 1.75V 1: 1.8125V ... 14: 2.625V

15: 2.6875V NOTE! The DriverLib function

SysCtrl_DCDC_VoltageConditionalControl() must be called regularly

to apply this field (handled automatically if using TI RTOS!).

19 ALT_DCDC_DITHER_EN R/W 1h

Enable DC/DC dithering if alternate DC/DC setting is enabled

(SIZE_AND_DIS_FLAGS.DIS_ALT_DCDC_SETTING=0). 0: Dither

disable 1: Dither enable

18-16 ALT_DCDC_IPEAK R/W 3h

Inductor peak current if alternate DC/DC setting is enabled

(SIZE_AND_DIS_FLAGS.DIS_ALT_DCDC_SETTING=0). Assuming

10uH external inductor! Peak current = 31 + ( 4 *

ALT_DCDC_IPEAK ) : 0: 31mA (min) ... 4: 47mA ... 7: 59mA (max)

15-12 DELTA_IBIAS_INIT R/W Fh

Signed delta value for IBIAS_INIT. Delta value only applies if

SIZE_AND_DIS_FLAGS.DIS_XOSC_OVR=0. See

FCFG1:AMPCOMP_CTRL1.IBIAS_INIT

11-8 DELTA_IBIAS_OFFSET R/W Fh

Signed delta value for IBIAS_OFFSET. Delta value only applies if

SIZE_AND_DIS_FLAGS.DIS_XOSC_OVR=0. See

FCFG1:AMPCOMP_CTRL1.IBIAS_OFFSET

7-0 XOSC_MAX_START R/W FFh

Unsigned value of maximum XOSC startup time (worst case) in units

of 100us. Value only applies if

SIZE_AND_DIS_FLAGS.DIS_XOSC_OVR=0.

688

Device Configuration SWCU117A–February 2015–Revised March 2015

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