STM32L021D4 datasheet(63/114 Pages) STMICROELECTRONICS

Part #	STM32L021D4

Description	Access line ultra-low-power 32-bit MCU Arm®-based Cortex®-M0, 16KB Flash, 2KB SRAM, 512B EEPROM, ADC, AES

PDF	114 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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63 / 114 page

DocID027982 Rev 5

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STM32L021x4

Electrical characteristics

tWUSTOP

Wakeup from Stop mode, regulator in

Run mode

fHCLK = fMSI = 4.2 MHz

5.1

µs

fHCLK = fHSI = 16 MHz

5.1

fHCLK = fHSI/4 = 4 MHz

8.1

Wakeup from Stop mode, regulator in

low-power mode

fHCLK = fMSI = 4.2 MHz

Voltage range 1

fHCLK = fMSI = 4.2 MHz

Voltage range 2

fHCLK = fMSI = 4.2 MHz

Voltage range 3

fHCLK = fMSI = 2.1 MHz

7.4

fHCLK = fMSI = 1.05 MHz

fHCLK = fMSI = 524 kHz

fHCLK = fMSI = 262 kHz

fHCLK = fMSI = 131 kHz

120

fHCLK = fMSI = 65 kHz

196

260

fHCLK = fHSI = 16 MHz

5.1

fHCLK = fHSI/4 = 4 MHz

8.2

Wakeup from Stop mode, regulator in

low-power mode, HSI kept running in

Stop mode

fHCLK = fHSI = 16 MHz

3.25

Wakeup from Stop mode, regulator in

low-power mode, code running from

RAM

fHCLK = fHSI = 16 MHz

4.9

fHCLK = fHSI/4 = 4 MHz

7.9

fHCLK = fMSI = 4.2 MHz

4.8

tWUSTDBY

Wakeup from Standby mode

FWU bit = 1

fHCLK = fMSI = 2.1 MHz

130

Wakeup from Standby mode

FWU bit = 0

fHCLK = fMSI = 2.1 MHz

2.2

Table 33. Low-power mode wakeup timings (continued)

Symbol

Parameter

Conditions

Typ

Max

Unit

STM32L021D4 Datasheet(PDF) 63 Page - STMicroelectronics

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