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AN4660 Datasheet(PDF) 19 Page - STMicroelectronics

Part # AN4660
Description  Designers of STM32 microcontroller applications must have the possibility
PDF  27 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN4660 Datasheet(HTML) 19 Page - STMicroelectronics

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DocID027558 Rev 2
19/27
AN4660
Peripheral migration
26
2.11
U(S)ART
The U(S)ART is not SW compatible with STM32F42xxx/F43xxx and includes new additional
features detailed in Table 16.
Table 16. U(S)ART differences between STM32F42xxx/F43xxx and
STM32F74xxx/F75xxx
U(S)ART
STM32F42xxx/F43xxx
STM32F74xxx/F75xxx
UART/USART
4/4
Baud rate
– Up to 4x11.25 Mbit/s
– Up to 13.5 Mbit/s
– (clock frequency is 100 MHz and
oversampling is by 8)
Clock
– Single clock domain
– Dual clock domain:
Convenient baud rate programming
independent from the PCLK
reprogramming
Data
– Word length: Programmable (8 or 9
bits)
– Word length: Programmable (7, 8 or 9
bits)
– Programmable data order with MSB-
first or LSB-first shifting
interrupt
– 10 interrupt sources with flags
– 14 interrupt sources with flags
Features
– LIN mode
– SPI Master
– IrDA SIR ENDEC block
– Hardware flow control (CTS/RTS)
– Continuous communication using DMA
– Multiprocessor communication
– Single-wire half-duplex communication
Smartcard mode T = 0 and T= 1 has to
be implemented by software.
Number of stop bits: 0.5, 1, 1.5, 2
Support the T=0 and T=1 asynchronous
protocols.
Number of stop bits: 1, 1.5, 2 smartcard
operation.
NA
– Support for ModBus communication
- Timeout feature
- CR/LF character recognition
– Receiver timeout interrupt
– Auto baud rate detection
– Driver Enable
– Swappable Tx/Rx pin configuration
U(S)ART
registers
– Software not compatible



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