Datasheet
Electrical characteristics STM32L100C6, STM32L100R8/RB
48/102 DocID024295 Rev 1
6.3.4 Supply current characteristics
The current consumption is a function of several parameters and factors such as the
operating voltage, ambient temperature, I/O pin loading, device software configuration,
operating frequencies, I/O pin switching rate, program location in memory and executed
binary code. The current consumption is measured as described in Figure 9: Current
consumption measurement scheme.
All Run-mode current consumption measurements given in this section are performed with a
reduced code that gives a consumption equivalent to Dhrystone 2.1 code.
Maximum current consumption
The MCU is placed under the following conditions:
• V
DD
= 3.6 V
• All I/O pins are in input mode with a static value at V
DD
or V
SS
(no load)
• All peripherals are disabled except when explicitly mentioned
• The Flash memory access time is adjusted depending on f
HCLK
frequency and voltage
range
• Prefetch and 64-bit access are enabled in configurations with 1 wait state
The parameters given in Table 15, Table 12 and Ta ble 13 are derived from tests performed
under ambient temperature and V
DD
supply voltage conditions summarized in Table 12.
Table 15. Current consumption in Run mode, code with data processing running from Flash
Symbol Parameter Conditions f
HCLK
Typ
Max
(1)
Unit
55 °C 85 °C
I
DD (Run
from Flash)
Supply
current in
Run mode,
code
executed
from Flash
f
HSE
= f
HCLK
up to 8 MHz, included
f
HSE
= f
HCLK
/2 above
8 MHz
(PLL ON)
(2)
Range 3, V
CORE
=1.2
V VOS[1:0] = 11
1 MHz 270 400 400
µA2 MHz 470 600 600
4 MHz 890 1025 1025
Range 2, V
CORE
=1.5
V VOS[1:0] = 10
4 MHz 1 1.3 1.3
mA
8 MHz 2 2.5 2.5
16 MHz 3.9 5 5
Range 1, V
CORE
=1.8
V VOS[1:0] = 01
8 MHz 2.16 3 3
16 MHz 4.8 5.5 5.5
32 MHz 9.6 11 11
HSI clock source (16
MHz)
Range 2, V
CORE
=1.5
V VOS[1:0] = 10
16 MHz 4 5 5
Range 1, V
CORE
=1.8
V VOS[1:0] = 01
32 MHz 9.4 11 11
MSI clock, 65 kHz
Range 3, V
CORE
=1.2
V VOS[1:0] = 11
65 kHz 0.05 0.085 0.09
MSI clock, 524 kHz 524 kHz 0.15 0.185 0.19
MSI clock,
4.2 MHz 4.2 MHz 0.9 1 1
1. Based on characterization, not tested in production, unless otherwise specified.
2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).