Usart Interrupts; Table 155. Usart Interrupt Requests - ST STM32F102 Series Reference Manual

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USART interrupts

Transmit Data Register Empty

Transmission Complete

Received Data Ready to be Read

Overrun Error Detected

Idle Line Detected

Parity Error

Noise Flag, Overrun error and Framing Error in multibuffer

communication

The USART interrupt events are connected to the same interrupt vector (see

During transmission: Transmission Complete, Clear to Send or Transmit Data Register

empty interrupt.

While receiving: Idle Line detection, Overrun error, Receive Data register not empty,

Parity error, LIN break detection, Noise Flag (only in multi buffer communication) and

Framing Error (only in multi buffer communication).

These events generate an interrupt if the corresponding Enable Control Bit is set.

Figure 257. USART interrupt mapping diagram

Universal synchronous asynchronous receiver transmitter (USART)

Interrupt event

NE or ORE or FE EIE

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