Q. When the PS(active low)/EN(active low) pin of 8259A used in buffered mode, then it can be used as a

View solution

Q. Once the ICW1 is loaded, then the initialization procedure involves

View solution

Q. When non-specific EOI command is issued to 8259A it will automatically

View solution

Q. In the application where all the interrupting devices are of equal priority, the mode used is

View solution

Q. The registers that store the keyboard and display modes and operations programmed by CPU are

View solution

Q. The sensor RAM acts as 8-byte first-in-first-out RAM in

View solution

Q. The registers that hold the address of the word currently being written by the CPU from the display RAM are

View solution

Q. When a key is pressed, a debounce logic comes into operation in

View solution

Q. The mode that is programmed using “end interrupt/error mode set command” is

View solution

Q. When a key is pressed, the debounce circuit waits for 2 keyboard scans and then checks whether the key is still depressed in

View solution

Q. The data that is entered from the left side of the display unit is of

View solution

Q. The FIFO status word is used to indicate the error in

View solution

Q. The flag that increments automatically after each read or write operation to the display RAM is

View solution

Q. If any change in sensor value is detected at the end of a sensor matrix scan, then the IRQ line

View solution

Q. Which of the following is not a mode of data transmission?

View solution

Q. If the data is transmitted only in one direction over a single communication channel, then it is of

View solution

Q. If the data transmission takes place in either direction, but at a time data may be transmitted only in one direction then, it is of

View solution

Q. In 8251A, the pin that controls the rate at which the character is to be transmitted is

View solution

Q. TXD(Transmitted Data Output) pin carries serial stream of the transmitted data bits along with

View solution

Q. The signal that may be used either to interrupt the CPU or polled by the CPU is

View solution