5.1.1.2.1. Informational requirements
| The USART module must provide information about its supported communication modes . | 
| The USART module must provide information about the full-duplex mode. | 
| In full-duplex mode, both transmission and reception occur simultaneously using separate data lines for TX and RX. | 
| Parity checking is configured using the PCE (Parity Control Enable) and PS (Parity Selection) bits. | 
| The USART module includes built-in error detection for the following conditions: parity, framing and overrun errors. | 
| Idle line detection is supported through the IDLEIE (Idle Interrupt Enable) bit in the USART_CR1 register. | 
| The USART_BRR register is used to set baud rates based on the system clock frequency. | 
| The USART module requires a stable system clock frequency to generate the correct baud rate for communication. | 
| The USART module provides details about the supported data word lengths, 8-bit or 9-bit. |