Which is correct for UART on the ATtiny$1626?$

Group of answer choices

The data register empty DREIF flag is set when the TXDATA register is ready to be accessed.

The data register empty DREIF flag is set when the RXDATA register is ready to be accessed.

The USART$0$ peripheral only has one interrupt vector.

The USART$0$ peripheral automatically generates the active low chip select $($CS$)$ output to select the device for communication.