In 8279, a scanned sensor matrix mode, if a sensor changes its state, the __________ line goes ___________ to interrupt the CPU

Related MCQs

• In 8279 Strobed input mode, the control line goes low. The data on return lines is strobed in the ___________.
• In 8279, the keyboard entries are de bounced and stored in an _________, that is further accessed by the CPU to read the key codes.
• The 8279 normally provides a maximum of ________ seven segment display interface with CPU.
• In 8279 Status Word, data is read when ________ pins are low, and write to the display RAM with ____________ are low.
• In scanned multiplexed displays _______ should sink seven or eight times that current
• These are _______ common cathode in scanned multiplexed displays
• There are ______ segment LEDs in scanned multiplexed displays
• In 8255, under the I/O mode of operation we have ___________ modes. Which mode will have the following features?
• A _____ Instruction at the end of interrupt service program takes the execution back to the interrupted program
• Bits in IRR interrupt are ______