Usart Implementation; Usart Functional Description; Table 157. Usart Features - ST STM32F423 Reference Manual

RM0430 Universal synchronous receiver transmitter (USART) /universal asynchronous receiver
–
–
–
–
–
–
•
Multiprocessor communication - enter into mute mode if address match does not occur
•
Wake up from mute mode (by idle line detection or address mark detection)
•
Two receiver wakeup modes: Address bit (MSB, 9
28.3

USART implementation

This section describes the full set of features implemented in USART1. Refer to
USART features
USART USART
(1)
modes/features
Asynchronous
mode
Hardware flow
control
Multibuffer
communication
(DMA)
Multiprocessor
communication
Synchronous
mode
Smartcard mode
Half-duplex
(single-wire mode)
IrDA SIR ENDEC
block
IrDA mode
LIN mode
1. X = supported.
28.4

USART functional description

The interface is externally connected to another device by three pins (see
USART bidirectional communication requires a minimum of two pins: Receive Data In (RX)
and Transmit Data Out (TX):
Receive data register full
Idle line received
Overrun error
Framing error
Noise error
Parity error
for the differences between USART instances.

Table 157. USART features

USART USART
1 2 3
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
X X X
UART UART USART
4 5
X X
NA NA
X X
X X
NA NA
NA NA X
X X
X X
X X
X X X
RM0430 Rev 8
th
bit), Idle line
UART UART
6 7 8
X X X
X NA NA
X X X
X X X
X NA NA
NA NA
X X X
X X X
X X X
X X
Figure
Table 157:
UART UART
9 10
X X
NA NA
X X
X X
NA NA
NA NA
X X
X X
X X
X X
292). Any
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