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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
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