RTC_SS
20.3.2.2 RTC Clock and Reset Management
The RTC functional clock (c32khz_clk input) is sourced by default from the CLK32_KHZ clock derived
from the Peripheral PLL. It can also be sourced from the 32-KHz oscillator through a clock mux within and
controlled by the RTC_SS.
Table 20-57. RTC Clock Signals
Clock Signal
Max Freq
Reference / Source
Comments
ocp_clk
100 MHz
CORE_CLKOUTM4 / 2
pd_rtc_l4_rtc_gclk
(Interface clock)
From PRCM
rtc_32K_clk_rtc_32k_clk
32.768 KHz
OSC1_IN
CLK_32K_RTC
(Oscillator functional clock)
From OSC1_IN
rtc_32k_clk_rtc_32k_aux_clk
32.768 KHz
PER_CLKOUTM2 / 5859.3752
pd_rtc_rtc_32kclk
(Internal functional clock)
From PRCM
20.3.2.3 RTC Pin List
The RTC module does not include any external interface pins.
Table 20-58. RTC Pin List
Pin
Type
Description
RTC_PORz
I
RTC Power On Reset
EXT_WAKEUP
I
External wakeup
PMIC_POWER_EN
O
Power enable control for external power management IC
Analog Signals
ENZ_KALDO_1P8V
I
Enable 1.8V LDO
VDDS_RTC
P
1.8V Voltage Supply
CAP_VDD_RTC
A
Decoupling Cap when internal 1.8 V LDO is enabled, 1.1
V supply when internal 1.8 V LDO is disabled.
3623
SPRUH73H – October 2011 – Revised April 2013
Timers
Copyright © 2011–2013, Texas Instruments Incorporated