The signal that may be used either to interrupt the CPU or polled by the CPU is
A. TXRDY(Transmitter ready)
B. RXRDY(Receiver ready output)
C. DSR
D. DTR
Answer:B
The signal that may be used either to interrupt the CPU or polled by the CPU is
A. TXRDY(Transmitter ready) B. RXRDY(Receiver ready output) C. DSR D. DTR