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try not enabling this interrupt to be present on IRQ pin, rather just examine by reading status register if/when necessary
Receive Buffer Error Interrupt Status. This IRQ is triggered in one of two ways: (1) When the receive buffer is empty and there
is an attempt to read data (2) When the receive buffer is full and more data is received; this flag is cleared when RX GO is set
and a SOP is received. These are the only ways by which this register gets set. This is a read only register. You will not be able to write to this register. Once you read it gets cleared
You are right .This are the only two ways where you can expect an interrupt and get the RXBERR IRQ bit set.