Q. In memory-mapped scheme, the devices are viewed as

View solution

Q. Programmable peripheral input-output port is another name for

View solution

Q. Port C of 8255 can function independently as

View solution

Q. All the functions of the ports of 8255 are achieved by programming the bits of an internal register called

View solution

Q. The data bus buffer is controlled by

View solution

Q. The input provided by the microprocessor to the read/write control logic is

View solution

Q. The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is

View solution

Q. The port that is used for the generation of handshake lines in mode 1 or mode 2 is

View solution

Q. If A1=0, A0=1 then the input read cycle is performed from

View solution

Q. The function, ‘data bus tristated’ is performed when

View solution

Q. The pin that clears the control word register of 8255 when enabled is

View solution

Q. In the I/O mode, the 8255 ports work as

View solution

Q. In BSR mode, only port C can be used to

View solution

Q. The feature of mode 0 is

View solution

Q. The strobed input/output mode is another name of

View solution

Q. If the value of the pin STB (Strobe Input) falls to low level, then

View solution

Q. The signal, SLCT in the direction of signal flow, OUT, indicates the selection of

View solution

Q. The pulse width of the signal INIT at the receiving terminal must be more than

View solution

Q. The level of the signal ERROR(active low) becomes ‘low’ when the printer is in

View solution

Q. The signals that are provided to maintain proper data flow and synchronization between the data transmitter and receiver are

View solution