Electrical characteristics
STM32F042xx
DocID025832 Rev 2
Typical current consumption
The MCU is placed under the following conditions:
V
DD
= V
DDA
= 3.3
V
All I/O pins are in analog input configuration
The Flash access time is adjusted to f
HCLK
frequency:
–
0 wait state and Prefetch OFF from 0 to 24 MHz
–
1 wait state and Prefetch ON above 24 MHz
When the peripherals are enabled, f
PCLK
= f
HCLK
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
Table 29. Typical and maximum current consumption from the V
BAT
supply
Symbol
Parameter
Conditions
Typ @ V
BAT
Max
(1)
Unit
= 1.65 V
= 1.8 V
= 2.4 V
= 2.7 V
= 3.3 V
= 3.6 V
T
A
=
25
°C
T
A
=
85
°C
T
A
=
105
°C
I
DD
_
VBAT
RTC
domain
supply
current
LSE & RTC ON; “Xtal
mode”: lower driving
capability;
LSEDRV[1:0] = '00'
0.5
0.5
0.6
0.7
0.9
1.1
1.2
1.5
2.0
μ
A
LSE & RTC ON; “Xtal
mode” higher driving
capability;
LSEDRV[1:0] = '11'
0.8
0.9
1.1
1.2
1.4
1.5
1.6
2.0
2.6
1. Data based on characterization results, not tested in production.
