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STM32L021D4 Datasheet(PDF) 17 Page - 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
Logo STMICROELECTRONICS - STMicroelectronics

STM32L021D4 Datasheet(HTML) 17 Page - STMicroelectronics

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STM32L021x4
Functional overview
32
Table 4. Functionalities depending on the working mode
(from Run/active down to standby) (1)(2)
IPs
Run/Active
Sleep
Low-
power
run
Low-
power
sleep
Stop
Standby
Wakeup
capability
Wakeup
capability
CPU
Y
-
Y
-
-
-
-
-
Flash memory
O
O
O
O
-
-
-
-
RAM
Y
Y
Y
Y
Y
-
-
-
Backup registers
Y
Y
Y
Y
Y
-
Y
-
EEPROM
O
O
O
O
-
-
-
-
Brown-out reset
(BOR)
OO
O
O
O
O
O
O
DMA
O
O
O
O
-
-
-
-
Programmable
Voltage Detector
(PVD)
OO
O
O
O
O
-
-
Power-on/down
reset (POR/PDR)
YY
Y
Y
Y
Y
Y
Y
High Speed
Internal (HSI)
OO
-
-
(3)
--
-
High Speed
External (HSE)
OO
O
O
-
-
-
-
Low Speed Internal
(LSI)
OO
O
O
O
-
O
-
Low Speed
External (LSE)
OO
O
O
O
-
O
-
Multi-Speed
Internal (MSI)
OO
Y
Y
-
-
-
-
Inter-Connect
Controller
YY
Y
Y
Y
-
-
-
RTC
O
O
O
O
O
O
O
-
RTC Tamper
O
O
O
O
O
O
O
O
Auto WakeUp
(AWU)
OO
O
O
O
-
O
O
USART
O
O
O
O
O(4)
O-
-
LPUART
O
O
O
O
O(4)
O-
-
SPI
O
O
O
O
-
-
-
I2C
O
O
O
O
O(5)
O-
-
ADC
O
O
-
-
-
-
-
-
Temperature
sensor
OO
O
O
O
-
-
-



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