8051 MICROCONTROLLER
ARCHITECTURE OF 8085
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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8
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4
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2
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1
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Detailed explanation-1: -8051 microcontrollers have 4 I/O ports each of 8-bit, which can be configured as input or output. Hence, total 32 input/output pins allow the microcontroller to be connected with the peripheral devices.
Detailed explanation-2: -Ports in 8051: There are 4 ports in 8051 IC (Port 0, Port 1, Port 2 and Port 3); 32 pins function as I/O port lines and 24 of these lines are dual-purpose (P0, P1, P3).
Detailed explanation-3: -Pins 10 to 17 − These pins are known as Port 3. This port serves some functions like interrupts, timer input, control signals, serial communication signals RxD and TxD, etc. Pins 18 & 19 − These pins are used for interfacing an external crystal to get the system clock.
Detailed explanation-4: -I/O Ports and their Functions. The four ports P0, P1, P2, and P3, each use 8 pins, making them 8-bit ports.