ST STM32F31xx User Manual page 400

Real-time clock (RTC)
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#define: RTC_TamperPrechargeDuration_8RTCCLK ((uint32_t)0x00006000)
Tamper pins are pre-charged before sampling during 8 RTCCLK cycles
RTC_Tamper_Sampling_Frequencies_Definitions
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#define: RTC_TamperSamplingFreq_RTCCLK_Div32768 ((uint32_t)0x00000000)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 32768
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#define: RTC_TamperSamplingFreq_RTCCLK_Div16384 ((uint32_t)0x000000100)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 16384
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#define: RTC_TamperSamplingFreq_RTCCLK_Div8192 ((uint32_t)0x00000200)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 8192
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#define: RTC_TamperSamplingFreq_RTCCLK_Div4096 ((uint32_t)0x00000300)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 4096
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#define: RTC_TamperSamplingFreq_RTCCLK_Div2048 ((uint32_t)0x00000400)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 2048
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#define: RTC_TamperSamplingFreq_RTCCLK_Div1024 ((uint32_t)0x00000500)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 1024
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#define: RTC_TamperSamplingFreq_RTCCLK_Div512 ((uint32_t)0x00000600)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 512
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#define: RTC_TamperSamplingFreq_RTCCLK_Div256 ((uint32_t)0x00000700)
Each of the tamper inputs are sampled with a frequency = RTCCLK / 256
RTC_Tamper_Trigger_Definitions
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#define: RTC_TamperTrigger_RisingEdge ((uint32_t)0x00000000)
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#define: RTC_TamperTrigger_FallingEdge ((uint32_t)0x00000001)
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