Datasheet

Functional overview STM32L052x6 STM32L052x8
34/143 DocID025936 Rev 8
Each I2C interface can be served by the DMA controller.
Refer to Table 12 for an overview of I2C interface features.
3.18.2 Universal synchronous/asynchronous receiver transmitter (USART)
The two USART interfaces (USART1, USART2) are able to communicate at speeds of up to
4 Mbit/s.
They provide hardware management of the CTS, RTS and RS485 driver enable (DE)
signals, multiprocessor communication mode, master synchronous communication and
single-wire half-duplex communication mode. They also support SmartCard communication
(ISO 7816), IrDA SIR ENDEC, LIN Master/Slave capability, auto baud rate feature and has
a clock domain independent from the CPU clock, allowing to wake up the MCU from Stop
mode using baudrates up to 42 Kbaud.
All USART interfaces can be served by the DMA controller.
Table 13 for the supported modes and features of USART interfaces.
Table 12. STM32L052x6/8 I
2
C implementation
I2C features
(1)
1. X = supported.
I2C1 I2C2
7-bit addressing mode X X
10-bit addressing mode X X
Standard mode (up to 100 kbit/s) X X
Fast mode (up to 400 kbit/s) X X
Fast Mode Plus with 20 mA output drive I/Os (up to 1 Mbit/s) X X
(2)
2. See for the list of I/Os that feature Fast Mode Plus capability
Independent clock X -
SMBus X -
Wakeup from STOP X -
Table 13. USART implementation
USART modes/features
(1)
USART1 and USART2
Hardware flow control for modem X
Continuous communication using DMA X
Multiprocessor communication X
Synchronous mode
(2)
X
Smartcard mode X
Single-wire half-duplex communication X
IrDA SIR ENDEC block X
LIN mode X
Dual clock domain and wakeup from Stop mode X
Receiver timeout interrupt X
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