PyQdeck LogoPyQdeckSubjectsSyllabusBlog
Back to the 2024 paper

Module 2: The 8051 Architecture

202414m

Illustrate the pin diagram of 8051 with the help of a suitable diagram and explain the utility of the pins available in 8051.

Search GoogleAsk AI
Worked SolutionAI Assisted

Pin Diagram of 8051 – Utility

DIP-40: Pin 40 VCC (+5V), 20 GND, 18-19 XTAL2/XTAL1 (crystal), 9 RST (reset), 29 \overline{PSEN} (ext program enable), 30 ALE/\overline{PROG}, 31 \overline{EA}/VPP, 10-17 P3.0-7, 1-8 P1.0-7, 21-28 P2.0-7, 32-39 P0.0-7.

Utility:

  • P0: AD0-7 multiplexed, needs latch.
  • P2: A8-15.
  • P3 alternates: RxD/TxD/INT0/INT1/T0/T1/WR/RD.
  • Control: ALE latches address, PSEN reads ext ROM, EA selects int/ext program, RST reset high.
  • Power/clock: VCC, GND, XTAL for oscillator.

Diagram description: rectangle with pins labelled clockwise; textual suffices.

Operation: With \overline{EA}=1 internal ROM used up to 4K then external; \overline{EA}=0 all external.

Similar questions

MICROPROCESSORSDiscuss the Functions associated to all I/O Port pins in 8051.20247mMICROPROCESSORSDraw and explain the internal block diagram of the 8051 microcontroller.20257mMICROPROCESSORSWith the help of schematic diagram, explain the interfacing of stepper motor with 8051 Microcontroller. Also, write ALP to change the speed and direction of motor.202414mMICROPROCESSORSExplain the various programming and debugging tools in 8051 micro-controller.20227m
PreviousExplain the oscillator circuit and timing of the 8051 microcontrollers.NextWhat is a Timer circuit? Explain the Timer operations associated to 8051 microcontrollers by using Timer Registers.
Budget AppAndroid App

Pocketly on Android

Log daily food, travel, and hostel expenses instantly. Set monthly spending limits and see where your money goes without complex spreadsheets.

Install Pocketly