pub type R = R<ISR_SPEC>;
Register ISR reader
ISR
struct R { /* private fields */ }
Bit 0 - Transmit FIFO empty interrupt status
Bit 1 - Transmit FIFO overflow interrupt status
Bit 2 - Receive FIFO underflow interrupt status
Bit 3 - Receive FIFO overflow interrupt status
Bit 4 - Receive FIFO full interrupt status
Bit 5 - Multi-master contention interrupt status