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(active low)
D. DTR(active low)
Answer:A
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(active low) D. DTR(active low)
Explanation: RXRDY(Receiver ready output) may be used either to interrupt the CPU or polled by the CPU.