This page is the summary of me reading the reference manual, If there are missing info or incorrect info, please contact me at [email protected]

UART Main Features

• Full duplex asynchronous communcation
• Configurable oversampling (we will use 16 because we’re using a bad PLL input in HSI, so sacrificing speed is okay)
• USART_1 uses the APB2 bus, which runs for us at 90MHz. From here, we can safely use 115200 for a balance of speed and no error
• USART will be active during standby/stop modes if we use a clock that’s not turned off
• Data word length can be programmed (8 to simplify char)
• LSB shifting when going from shift register to TX/RX line
• 1/2 stop bits (we’ll probably just use one)
• TE and RE (TX/RX enable) bits for each thing

UART Functional Description

• Data frame itself (will go over below somewhere)
• Status Register (ISR)
• Receive and Transmit data registers (RDR and TDR)
• Baud Rate Register (BRR)

Character Description