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 1. Measurement Setup
Table 1. 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 |
Table 2. 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 |