Table 29. Typical And Maximum Current Consumption From The Vbat Supply - STMicroelectronics STM32F042G4 Manual

Electrical characteristics
Table 29. Typical and maximum current consumption from the V
Symbol Parameter
RTC
domain
I _
DD VBAT
supply
current
1. Data based on characterization results, not tested in production.
Typical current consumption
The MCU is placed under the following conditions:

V
DD

All I/O pins are in analog input configuration

The Flash access time is adjusted to f
–
–

When the peripherals are enabled, f

PLL is used for frequencies greater than 8 MHz

AHB prescaler of 2, 4, 8 and 16 is used for the frequencies 4 MHz, 2 MHz, 1 MHz and
500 kHz respectively
56/117
Conditions
LSE & RTC ON; "Xtal
mode": lower driving
capability;
LSEDRV[1:0] = '00'
LSE & RTC ON; "Xtal
mode" higher driving
capability;
LSEDRV[1:0] = '11'
= V = 3.3 V
DDA
0 wait state and Prefetch OFF from 0 to 24 MHz
1 wait state and Prefetch ON above 24 MHz
DocID025832 Rev 2
Typ @ V
BAT
0.5 0.5 0.6 0.7
0.8 0.9 1.1 1.2
frequency:
HCLK
= f
PCLK HCLK
supply
BAT
Max
T = T
A A
25 °C 85 °C
0.9 1.1 1.2 1.5
1.4 1.5 1.6 2.0
STM32F042xx
(1)
Unit
= T =
A
105 °C
2.0
μA
2.6