8085 MICROPROCESSOR
FEATURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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I/O control and data buffers
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control and timing registers
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return buffers
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display address registers
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Detailed explanation-1: -Explanation: The control and timing register to store the keyboard and display modes and other operations programmed by CPU. Explanation: In this mode, each key code of the pressed key is entered in the order of the entry, and in the meantime, read by the CPU, till the RAM becomes empty.
Detailed explanation-2: -The control and timing registers store the keyboard and display modes and other operations programmed by CPU.
Detailed explanation-3: -It has two modes i.e. Encoded mode and Decoded mode. In the encoded mode, the counter provides the binary count that is to be externally decoded to provide the scan lines for the keyboard and display.
Detailed explanation-4: -The two operating modes of keyboard section are 2-key lockout and N-key rollover. In the 2-key lockout mode, if two keys are pressed simultaneously, only the first key is recognized. In the N-key rollover mode simultaneous keys are recognized and their codes are stored in FIFO.
Detailed explanation-5: -If a sensor changes its state, the IRQ line goes high to interrupt the CPU. Display Address Registers and Display RAM. The Display address registers hold the addresses of the word currently being written or read by the CPU to or from the display RAM.