STM32L021D4 datasheet(53/114 Pages) STMICROELECTRONICS

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DocID027982 Rev 5

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STM32L021x4

Electrical characteristics

Table 21. Current consumption in Run mode, code with data processing running from Flash

Symbol

Parameter

Conditions

fHCLK

Typ

Max(1)

Unit

IDD

(Run

from

Flash)

Supply

current in

Run mode,

code

executed

from Flash

fHSE = fHCLK up to

16 MHz included,

fHSE = fHCLK/2 above

16 MHz (PLL ON)(2)

Range 3, VCORE=1.2 V

VOS[1:0]=11

1 MHz

140

180

µA

2 MHz

245

290

4MHz

460

540

Range 2, VCORE=1.5 V,

VOS[1:0]=10,

4 MHz

0.56

0.65

8 MHz

1.1

1.3

16 MHz

2.1

2.4

Range 1, VCORE=1.8 V,

VOS[1:0]=01

8 MHz

1.3

1.6

16 MHz

2.6

32 MHz

5.3

6.5

MSI clock

Range 3, VCORE=1.2 V,

VOS[1:0]=11

65 kHz

34.5

µA

524 kHz

120

4.2 MHz

505

560

HSI clock

Range 2, VCORE=1.5 V,

VOS[1:0]=10,

16 MHz

2.2

2.6

Range 1, VCORE=1.8 V,

VOS[1:0]=01

32 MHz

5.4

5.9

1. Guaranteed by characterization results at 125 °C, not tested in production, unless otherwise specified.

2. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).

Table 22. Current consumption in Run mode vs code type,

code with data processing running from Flash

Symbol

Parameter

Conditions

fHCLK

Typ

Unit

IDD

(Run

from

Flash)

Supply

current in

Run mode,

code

executed

from Flash

fHSE = fHCLK up to

16 MHz included,

fHSE = fHCLK/2 above

16 MHz (PLL ON)(1)

Range 3,

VCORE=1.2 V,

VOS[1:0]=11

Dhrystone

4 MHz

460

µA

CoreMark

440

Fibonacci

330

while(1)

305

while(1), prefetch

OFF

320

Range 1,

VOS[1:0]=01,

VCORE=1.8 V

Dhrystone

32 MHz

5.4

CoreMark

4.9

Fibonacci

while(1)

4.35

while(1), prefetch

OFF

3.7

1. Oscillator bypassed (HSEBYP = 1 in RCC_CR register).

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