RTC_TAMPCR register
| TAMP1E | RTC_TAMP1 input detection enable 0: RTC_TAMP1 detection disabled 1: RTC_TAMP1 detection enabled. |
| TAMP1TRG | Active level for RTC_TAMP1 input If TAMPFLT != 00 0: RTC_TAMP1 input staying low triggers a tamper detection event. 1: RTC_TAMP1 input staying high triggers a tamper detection event. if TAMPFLT = 00: 0: RTC_TAMP1 input rising edge triggers a tamper detection event. 1: RTC_TAMP1 input falling edge triggers a tamper detection event. |
| TAMPIE | Tamper interrupt enable 0: Tamper interrupt disabled 1: Tamper interrupt enabled. |
| TAMPTS | Activate timestamp on tamper detection event 0: Tamper detection event does not cause a timestamp to be saved 1: Save timestamp on tamper detection event TAMPTS is valid even if TSE=0 in the RTC_CR register. |
| TAMPFREQ | Tamper sampling frequency Determines the frequency at which each of the RTC_TAMPx inputs are sampled. 0x0: RTCCLK / 32768 (1 Hz when RTCCLK = 32768 Hz) 0x1: RTCCLK / 16384 (2 Hz when RTCCLK = 32768 Hz) 0x2: RTCCLK / 8192 (4 Hz when RTCCLK = 32768 Hz) 0x3: RTCCLK / 4096 (8 Hz when RTCCLK = 32768 Hz) 0x4: RTCCLK / 2048 (16 Hz when RTCCLK = 32768 Hz) 0x5: RTCCLK / 1024 (32 Hz when RTCCLK = 32768 Hz) 0x6: RTCCLK / 512 (64 Hz when RTCCLK = 32768 Hz) 0x7: RTCCLK / 256 (128 Hz when RTCCLK = 32768 Hz) |
| TAMPFLT | RTC_TAMPx filter count These bits determines the number of consecutive samples at the specified level (TAMP*TRG) needed to activate a Tamper event. TAMPFLT is valid for each of the RTC_TAMPx inputs. 0x0: Tamper event is activated on edge of RTC_TAMPx input transitions to the active level (no internal pull-up on RTC_TAMPx input). 0x1: Tamper event is activated after 2 consecutive samples at the active level. 0x2: Tamper event is activated after 4 consecutive samples at the active level. 0x3: Tamper event is activated after 8 consecutive samples at the active level. |
| TAMPPRCH | RTC_TAMPx precharge duration These bit determines the duration of time during which the pull-up/is activated before each sample. TAMPPRCH is valid for each of the RTC_TAMPx inputs. 0x0: 1 RTCCLK cycle 0x1: 2 RTCCLK cycles 0x2: 4 RTCCLK cycles 0x3: 8 RTCCLK cycles |
| TAMPPUDIS | RTC_TAMPx pull-up disable This bit determines if each of the RTC_TAMPx pins are pre-charged before each sample. 0: Precharge RTC_TAMPx pins before sampling (enable internal pull-up) 1: Disable precharge of RTC_TAMPx pins. |
| TAMP1IE | Tamper 1 interrupt enable 0: Tamper 1 interrupt is disabled if TAMPIE = 0. 1: Tamper 1 interrupt enabled. |
| TAMP1NOERASE | Tamper 1 no erase 0: Tamper 1 event erases the backup registers. 1: Tamper 1 event does not erase the backup registers. |
| TAMP1MF | Tamper 1 mask flag 0: Tamper 1 event generates a trigger event and TAMP1F must be cleared by software to allow next tamper event detection. 1: Tamper 1 event generates a trigger event. TAMP1F is masked and internally cleared by hardware.The backup registers are not erased. |