Q1.If CWR=9B H , the counter operation is
load LSB
load MSB
Counter latch
Q2.___ is used to disable (Mask) or enable (Unmask) individual interrupt request inputs.
Q3.Control words and status information from the microprocessor to PIC and from PIC to microprocessor respectively, are transferred through the
Q4.With respect to 8255 Programmable Peripheral Interface (PPI), which of the following statement(s) are correct?
1. Mode 0: Any port can be used as input/output ports.
2. Mode 1: Both Port A and B can be used as input/output ports.
3. Mode 2: Port B can be used either in Mode 0 or Mode 1.
Q5.In 8255, under the I/O mode of operation we have __ modes. Under which mode will have the following features
i) A 5 bit control port is available.
ii) Three I/O lines are available at Port C.
Q6.Which of these register’s contents are used for auto-initialization (internally)?
Current Word Register
Current address Register
Base Address Register
command Register
Q7.Which of the following is a type of DMA transfer?
Memory Read
Memory Write
Transfer verification
All the above
Q1.If CWR=9B H , the counter operation is
ANSWER: load LSB
Q2.___ is used to disable (Mask) or enable (Unmask) individual interrupt request inputs.
ANSWER:IMR
Q3.Control words and status information from the microprocessor to PIC and from PIC to microprocessor respectively, are transferred through the
ANSWER: DATA BUS BUFFER
Q4.With respect to 8255 Programmable Peripheral Interface (PPI), which of the following statement(s) are correct?
1. Mode 0: Any port can be used as input/output ports.
2. Mode 1: Both Port A and B can be used as input/output ports.
3. Mode 2: Port B can be used either in Mode 0 or Mode 1.
ANSWER: ALL
Q5.In 8255, under the I/O mode of operation we have __ modes. Under which mode will have the following features
i) A 5 bit control port is available.
ii) Three I/O lines are available at Port C.
ANSWER: 2 MODE 2
Q6.Which of these register’s contents are used for auto-initialization (internally)?
Current Word Register
Current address Register
Base Address Register
command Register
ANSWER: Base Address Register
Q7.Which of the following is a type of DMA transfer?
Memory Read
Memory Write
Transfer verification
All the above
ANSWER: ALL