Texas Instruments SimpleLink CC2620 Technical Reference Manual page 694

Customer Configuration (CCFG)
Table 9-5. MODE_CONF Register Field Descriptions (continued)
Bit Field
23-22 SCLK_LF_OPTION
21 RESERVED
20 RTC_COMP
19-18 XOSC_FREQ
17 XOSC_CAP_MOD
16 HF_COMP
15-8 XOSC_CAPARRAY_DEL
TA
7-0 VDDR_CAP
694
Device Configuration
Type Reset Description
R/W 3h Select source for SCLK_LF
0: XOSC_HF_DLF
31.25-kHz clock derived from 24-MHz XOSC. Requires user to
reconfigure RTC tick speed for correct timing. Standby power mode
is not supported when using this clock source.
1: EXTERNAL
External low frequency clock on DIO defined in EXT_LF_CLK.DIO.
The RTC tick speed AON_RTC.SUBSECINC is updated to
EXT_LF_CLK.RTC_INCREMENT. External clock must always be
running when the chip is in standby for VDDR recharge timing.
2: XOSC_LF
32.768kHz low frequency XOSC
3: RCOSC_LF
Low frequency RCOSC (default)
R/W 1h
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
R/W 1h
Reserved for future use. Software must not rely on the value of a
reserved. Writing any other value than the reset/default value may
result in undefined behavior.
R/W 3h
Reserved for future use. Software must not rely on the value of a
reserved. Writing any other value than the reset/default value may
result in undefined behavior.
R/W 1h Enable modification (delta) to XOSC cap-array. Value specified in
XOSC_CAPARRAY_DELTA.
0: Apply cap-array delta
1: Do not apply cap-array delta (default)
R/W 1h
Reserved for future use. Software must not rely on the value of a
reserved. Writing any other value than the reset/default value may
result in undefined behavior.
R/W FFh
Signed 8-bit value, directly modifying trimmed XOSC cap-array step
value. Enabled by XOSC_CAP_MOD.
R/W FFh Unsigned 8-bit integer, representing the minimum decoupling
capacitance (worst case) on VDDR, in units of 100 nF. This must
take into account capacitor tolerance and voltage dependent
capacitance variation. This bit affects the recharge period calculation
when going into power down or standby.
NOTE: If using the following functions this field must be configured
(used by TI RTOS):
SysCtrlSetRechargeBeforePowerDown()
SysCtrlAdjustRechargeAfterPowerDown()
Copyright © 2015, Texas Instruments Incorporated
SWCU117C – February 2015 – Revised September 2015
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