ST STM32F405 User Manual

Universal synchronous asynchronous receiver transmitter (USART) RM0090
968/1749 RM0090 Rev 18
Figure 296. USART block diagram
Wakeup
unit
Receiver
control
SR
Transmit
control
TXE TC RXNEIDLEORE NF FE
USART
control
interrupt
CR1
M WAKE
Receive data register (RDR)
Receive Shift Register
Read
Transmit data register (TDR)
Transmit Shift Register
Write
SW_RX
TX
(Data register) DR
Transmitter
clock
Receiver
clock
Receiver rate
Transmitter rate
f
PCLKx(x=1,2)
control
control
/ [8 x (2 - OVER8)]
Conventional baud rate generator
SBKRWURETE
IDLERXNE
TCIETXEIE
CR1
UE PCE PS PEIE
PE
PWDATA
IRLP
SCEN
IREN
DMAR
DMAT
USART Address
CR2
CR3
IrDA
SIR
ENDEC
block
LINE
CKEN CPOL
CPHA LBCL
SCLK control
CK
CR2
GT
STOP[1:0]
NACK
DIV_Mantissa
15
0
RE
USART_BRR
/USARTDIV
TE
HD
(CPU or DMA)
(CPU or DMA)
PRDATA
Hardware
flow
controller
CTS LBD
RX
IRDA_OUT
IRDA_IN
RTS
CTS
GTPR
PSC
IE
IE
DIV_Fraction
4
USARTDIV = DIV_Mantissa + (DIV_Fraction / 8 × (2 – OVER8))
SAMPLING
CR1
OVER8
DIVIDER
ai16099b

ST STM32F405 Specifications

General

Brand	ST
Model	STM32F405
Category	Computer Hardware
Language	English