58.3.1 Backup Mode Current Consumption and Wake-Up Time

The Backup mode configurations and measurements are defined as follows:

  • Embedded slow clock RC oscillator is enabled
  • Supply Monitor on VDDIO is disabled
  • RTC is running
  • RTT is enabled on 1 Hz mode
  • BOD is disabled
  • One WKUPx enabled
  • Current measurement on AMP1 with and without the 1 Kbyte backup SRAM
  • Measurements are made at ambient temperature
Figure 58-5. Measurement Setup
Table 58-11. Worst Case Power Consumption for Backup Mode with 1 Kbyte BACKUP SRAM On
Total Consumption Worst Case Value Unit
at 25°C at 85°C at 105°C
Conditions AMP1 AMP1 AMP1
VDDIO = 3.6V 8.4 42 64 µA
VDDIO = 3.3V 8 39 61 µA
VDDIO = 3.0V 7.6 38 59 µA
VDDIO = 2.5V 5.2 37 58 µA
VDDIO = 1.7V 3.8 35 56 µA
Table 58-12. Worst Case Power Consumption for Backup Mode with 1 Kbyte BACKUP SRAM Off
Total Consumption Worst Case Value Unit
at 25°C at 85°C at 105°C
Conditions AMP1 AMP1 AMP1
VDDIO = 3.6V 5.1 16.4 24 µA
VDDIO = 3.3V 3.7 14.8 23 µA
VDDIO = 3.0V 3.4 13.2 22 µA
VDDIO = 2.5V 2.7 12.8 21 µA
VDDIO = 1.7V 1.3 9.6 18 µA