18.6.16 RTC TimeStamp Time Register 0 (Default Mode)

These fields are valid for non-UTC mode only.

RTC_TSTR0 reports the timestamp of the first tamper event after reading RTC_TSSR0.

Name: RTC_TSTR0 (DEFAULT_MODE)
Offset: 0xB0
Reset: 0x00000000
Property: Read-only

Bit 3130292827262524 
 BACKUP   TEVCNT[3:0] 
Access RRRRR 
Reset 00000 
Bit 2322212019181716 
  AMPMHOUR[5:0] 
Access RRRRRRR 
Reset 0000000 
Bit 15141312111098 
  MIN[6:0] 
Access RRRRRRR 
Reset 0000000 
Bit 76543210 
  SEC[6:0] 
Access RRRRRRR 
Reset 0000000 

Bit 31 – BACKUP System Mode of the Tamper (cleared by reading RTC_TSSR0)

ValueDescription
0

The state of the system is different from Backup mode when the tamper event occurs.

1

The system is in Backup mode when the tamper event occurs.

Bits 27:24 – TEVCNT[3:0] Tamper Events Counter (cleared by reading RTC_TSSR0)

Each time a tamper event occurs, this counter is incremented. This counter saturates at 15. Once this value is reached, it is no more possible to know the exact number of tamper events.

If this field is not null, this implies that at least one tamper event occurs since last register reset and that the values stored in timestamping registers are valid.

Bit 22 – AMPM AM/PM Indicator of the Tamper (cleared by reading RTC_TSSR0)

Bits 21:16 – HOUR[5:0] Hours of the Tamper (cleared by reading RTC_TSSR0)

Bits 14:8 – MIN[6:0] Minutes of the Tamper (cleared by reading RTC_TSSR0)

Bits 6:0 – SEC[6:0] Seconds of the Tamper (cleared by reading RTC_TSSR0)