Texas Instruments SimpleLink CC2620 Technical Reference Manual page 432

PRCM Registers
6.2.1.1 CTL0 Register (Offset = 0h) [reset = 0h]
CTL0 is shown in Figure 6-7
Control 0
Controls various clock source selects
31 30
XTAL_IS_24M RESERVED
R/W-0h R/W-0h
23 22
RESERVED FORCE_KICKS
TART_EN
R/W-0h R/W-0h
15 14
RESERVED
R/W-0h
7 6
ACLK_TDC_S ACLK_REF_SRC_SEL
RC_SEL
R/W-0h
Bit Field
31 XTAL_IS_24M
30 RESERVED
29 BYPASS_XOSC_LF_CLK R/W
_QUAL
28 BYPASS_RCOSC_LF_CL R/W
K_QUAL
27-26 DOUBLER_START_DUR
ATION
25 DOUBLER_RESET_DUR
ATION
24-23 RESERVED
22 FORCE_KICKSTART_EN R/W
21-17 RESERVED
16 ALLOW_SCLK_HF_SWIT R/W
CHING
432
Power, Reset, and Clock Management
and described in
Figure 6-7. CTL0 Register
29 28
BYPASS_XOS BYPASS_RCO
C_LF_CLK_QU SC_LF_CLK_Q
AL UAL
R/W-0h R/W-0h
21 20
13 12
RCOSC_LF_T
RIMMED
R/W-0h
5 4
SPARE4
R/W-0h R/W-0h
Table 6-9. CTL0 Register Field Descriptions
Type Reset
R/W 0h
R/W 0h
0h
0h
R/W 0h
R/W 0h
R/W 0h
0h
R/W 0h
0h
Copyright © 2015, Texas Instruments Incorporated
Table 6-9.
27 26
DOUBLER_START_DURATION
R/W-0h
19 18
RESERVED
R/W-0h
11 10
XOSC_HF_PO XOSC_LF_DIG CLK_LOSS_EN
WER_MODE _BYPASS
R/W-0h R/W-0h
3 2
SCLK_LF_SRC_SEL
R/W-0h
Description
Set based on the accurate high frequency XTAL.
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Internal. Only to be used through TI provided API.
Internal. Only to be used through TI provided API.
Internal. Only to be used through TI provided API.
Internal. Only to be used through TI provided API.
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Internal. Only to be used through TI provided API.
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
0: Default - Switching of HF clock source is disabled .
1: Allows swtiching of sclk_hf source.
Provided to prevent switching of the SCLK_HF source when running
from flash (a long period during switching could corrupt flash). When
sclk_hf switching is disabled, a new source can be started when
SCLK_HF_SRC_SEL is changed, but the switch will not occur until
this bit is set. This bit must be set to enable clock switching after
STAT0.PENDINGSCLKHFSWITCHING indicates the new HF clock
is ready. When switching completes (also indicated by
STAT0.PENDINGSCLKHFSWITCHING) sclk_hf switching must be
disabled to prevent flash corruption. Switching must not be enabled
when running from flash.
SWCU117C – February 2015 – Revised September 2015
www.ti.com
25 24
DOUBLER_RE RESERVED
SET_DURATIO
N
R/W-0h R/W-0h
17 16
ALLOW_SCLK
_HF_SWITCHI
NG
R/W-0h
9 8
ACLK_TDC_S
RC_SEL
R/W-0h R/W-0h
1 0
SCLK_MF_SR SCLK_HF_SR
C_SEL C_SEL
R/W-0h R/W-0h
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