43.6.10 Interrupts

An I2SC interrupt request can be triggered whenever one or several of the following bits are set in I2SC_SR: Receive Ready (RXRDY), Receive Overrun (RXOR), Transmit Ready (TXRDY) or Transmit Underrun (TXUR).

The interrupt request is generated if the corresponding bit in the Interrupt Mask Register (I2SC_IMR) is set. Bits in I2SC_IMR are set by writing a ’1’ to the corresponding bit in I2SC_IER and cleared by writing a ’1’ to the corresponding bit in the Interrupt Disable Register (I2SC_IDR). The interrupt request remains active until the corresponding bit in I2SC_SR is cleared by writing a ’1’ to the corresponding bit in the Status Clear Register (I2SC_SCR).

For debug purposes, interrupt requests can be simulated by writing a ’1’ to the corresponding bit in the Status Set Register (I2SC_SSR).