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ECNG2006 : Introduction to Micro-Processors (Semester II- 2025/2026)
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PIC 16F I/O ports have two associated registers TRISx and PORTx. Pins 5 and 6 of a particular port are connected to LEDs correctly. If the value in the TRISx register is 0x3F and the value in the PORTx register is 0x4F then
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Which ONE of the following features (if any) is NOT found in a communication peripheral:
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You wish to assign an assembly language variable to a space in the memory map of a PIC16F using the EQU directive. Which of the following is a suitable address?
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A micro-controller IC is configured so that a pin-voltage of +5V is interpreted as logic-high and -5V is interpreted as logic-low.
The signal
Q is associated with pin-5.
Which of the following statements are known to be CORRECT:
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Which ONE of the following is NOT a feature of the PIC16F877?
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A PIC16F877 powered at 4.9V is required to switch a digital signal line. The load at the end of the line sinks 40mA, and has a load capacitance of 0.1 pF. The load reads a logic high at V=2.5V and a logic low at 1.8V. Required rise/fall times for the signal are comparable to the nominal values for the PIC16F877 I/O pins. Which one of the following statements is NOT correct?
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You have built a circuit to connect an LED between a PIC16F877 port pin and ground (via a resistor). You have written a program which toggles the port pin which the LED is connected to. When you run the program on the PIC16F877, the LED does not appear to flash. Which ONE of the following statements is NOT a plausible explanation?
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A student interfaces an LED (Voltage drop 1.8V Max. Current 5mA) to the PIC16F877. Which of the following is NOT an appropriate method of doing so:
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