RTC_SS
20.3.5.19 RTC_OSC_REG Register (offset = 54h) [reset = 10h]
RTC_OSC_REG is shown in
and described in
Figure 20-79. RTC_OSC_REG Register
31
30
29
28
27
26
25
24
Reserved
R-0h
23
22
21
20
19
18
17
16
Reserved
R-0h
15
14
13
12
11
10
9
8
Reserved
R-0h
7
6
5
4
3
2
1
0
Reserved
EN_32KCLK
Reserved
OSC32K_GZ
SEL_32KCLK_SRC
RES_SELECT
SW2
SW1
R-0h
R/W-0h
R-0h
R/W-1h
R/W-0h
R/W-0h
R/W-0h
R/W-0h
LEGEND: R/W = Read/Write; R = Read only; W1toCl = Write 1 to clear bit; -n = value after reset
Table 20-82. RTC_OSC_REG Register Field Descriptions
Bit
Field
Type
Reset
Description
31-7
Reserved
R
0h
6
EN_32KCLK
R/W
0h
32-kHz clock enable post clock mux of rtc_32k_clk_rtc_32k_aux_clk
and rtc_32k_clk_rtc_32k_clk
0x0 = Disable
0x1 = Enable
5
Reserved
R
0h
4
OSC32K_GZ
R/W
1h
Disable the oscillator and apply high impedance to the output
0x0 = Enable
0x1 = Disabled and high impedance
3
SEL_32KCLK_SRC
R/W
0h
32-kHz clock source select
0x0 = Selects internal clock source, namely
rtc_32k_clk_rtc_32k_aux_clk
0x1 = Selects external clock source, namely rtc_32k_clk_rtc_32k_clk
that is from the 32-kHz oscillator
2
RES_SELECT
R/W
0h
External feedback resistor
0x0 = Internal
0x1 = External
1
SW2
R/W
0h
Inverter size adjustment
0
SW1
R/W
0h
Inverter size adjustment
3653
SPRUH73H – October 2011 – Revised April 2013
Timers
Copyright © 2011–2013, Texas Instruments Incorporated