MICROPROCESSOR 8255
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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set individual ports
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reset individual ports
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set and reset individual ports
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programmable I/O ports
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Detailed explanation-1: -Explanation: In BSR (Bit Set-Reset) Mode, port C can be used to set and reset its individual port bits. Explanation: In mode 0, any port can be used as input or output and output ports are latched.
Detailed explanation-2: -Bit Set/Reset (BSR) mode D7 bit is always 0 for BSR mode. Bits D6, D5 and D4 are don’t care bits. Bits D3, D2 and D1 are used to select the pin of Port C. Bit D0 is used to set/reset the selected pin of Port C.
Detailed explanation-3: -What is correct about the BSR mode from below? Explanation: BSR (Bit Set/Rest) mode is used to program individual bits of PORT C only.
Detailed explanation-4: -Explanation: The upper Port C is used for the generation of mode 1 or mode 2 handshake lines. Question 21: The pin that clears the control word register of 8255 when enabled is, RESET.