To Next Page

To Previous Page

Low-power universal asynchronous receiver transmitter (LPUART) RM0367

862/1043 RM0367 Rev 7

Bit 16 RXINV: RX pin active level inversion

This bit is set and cleared by software.

0: RX pin signal works using the standard logic levels (V

=1/idle, Gnd=0/mark)

1: RX pin signal values are inverted. ((V

=0/mark, Gnd=1/idle).

This allows the use of an external inverter on the RX line.

This bit field can only be written when the LPUART is disabled (UE=0).

Bit 15 SWAP: Swap TX/RX pins

This bit is set and cleared by software.

0: TX/RX pins are used as defined in standard pinout

1: The TX and RX pins functions are swapped. This allows to work in the case of a cross-wired

connection to another UART.

This bit field can only be written when the LPUART is disabled (UE=0).

Bit 14 Reserved, must be kept at reset value

Bits 13:12 STOP[1:0]: STOP bits

These bits are used for programming the stop bits.

00: 1 stop bit

01: Reserved.

10: 2 stop bits

11: Reserved

This bit field can only be written when the LPUART is disabled (UE=0).

Bits 11:5 Reserved, must be kept at reset value

Bit 4 ADDM7:7-bit Address Detection/4-bit Address Detection

This bit is for selection between 4-bit address detection or 7-bit address detection.

0: 4-bit address detection

1: 7-bit address detection (in 8-bit data mode)

This bit can only be written when the LPUART is disabled (UE=0)

Note: In 7-bit and 9-bit data modes, the address detection is done on 6-bit and 8-bit address

(ADD[5:0] and ADD[7:0]) respectively.

Bits 3:0 Reserved, must be kept at reset value.

ST STM32L0x3 User Manual

Questions and Answers: