The open drain bidirectional (input or output) port with internal pullups is
A. Port 0
B. Port 1
C. Port 2
D. Port 3
Answer:A
The open drain bidirectional (input or output) port with internal pullups is
A. Port 0 B. Port 1 C. Port 2 D. Port 3
Explanation: Port 0 is an open drain bidirectional (input or output) port with internal pullups. Port 1, Port 2, Port 3 are 8-bit bidirectional ports.