This set of Arduino Interview Questions and Answers focuses on “Microcontroller Specifications – AtMega 2560”.
1. How much flash memory does the Atmega2560 have?
a) 13K bytes
b) 200K bytes
c) 256K bytes
d) 255K bytes
View Answer
Explanation: A flash memory is a type of non-volatile memory, which does not get erased when the power supply is cutoff from the chip. The Atmega2560 has 256K bytes of flash memory.
2. How many timers does the Atmega2560 have?
a) 1
b) 2
c) 4
d) 6
View Answer
Explanation: The Atmega2560 has a total of 6 timers, of which 2 are 8-bit timers and 4 are 16-bit timers. The number of bits here represents the resolution of the timers, I.e. the number of bits each timer can store.
3. How many comparators does the Atmega2560 have?
a) 1
b) 2
c) 3
d) 4
View Answer
Explanation: A comparator is basically used for comparing voltages. It takes 2 voltages as input and outputs the higher of the two. The Atmega2560 has 1 such comparator only.
4. There are __ Digital IO and __ Analog IO Pins on the Atmega2560.
a) 29, 30
b) 54, 16
c) 53, 17
d) 52, 18
View Answer
Explanation: The Atmega2560 has 54 Digital IO Pins and 16 Analog Pins, which, on the Arduino Mega are numbered as D0 to D53 and A0 to A15 respectively. From them, pins D2 to D13 support Pulse Width Modulation.
5. Which Arduino Boards use the Atmega2560?
a) Arduino Mega and Mega ADK
b) Arduino Micro and Due
c) Arduino Uno and Robot
d) Arduino Nano and Fio
View Answer
Explanation: Both the Arduino Mega and the Arduino Mega ADK use the Atmega2560, however the only difference between the two boards is that the Arduino Mega ADK was specifically built with Android phones in mind and has a USB to host connector that can plug into your android smartphone.
6. What is the operating voltage of Atmega2560?
a) 12V to 9V
b) 1.9V to 5V
c) 2V to 12V
d) 1.8V to 5.5V
View Answer
Explanation: The operating voltage of the Atmega2560 is 1.8V to 5.5V. Provide any voltage lower than that and the chip will not function. But however, if any voltage higher than the rated voltage is provided there is a chance of damaging the IC physically. So, under no circumstance should this chip be provided a voltage more than the rated voltage.
7. The Atmega2560 is an _________ bit chip.
a) 8
b) 16
c) 32
d) 64
View Answer
Explanation: The Atmega2560 is capable of processing 8 bits of data at a time and hence it has an 8-bit architecture. Other similar 8-bit processors include the Intel 8080 Processor which ran on a similar 8-bit architecture.
8. Does the Atmega2560 have an index corner?
a) Yes
b) No
View Answer
Explanation: The Atmega2560, like most other chips has an index corner which is used to identify the numbering of the pins when reading the pin configuration of the chip. Almost all chips have a similar index corner without which, numbering of the pins would be very difficult.
9. How many General-Purpose Registers are present in the Atmega2560?
a) 12
b) 32
c) 64
d) 9
View Answer
Explanation: There are 32 General-Purpose Registers in the chip and they are all connected to the ALU (Arithmetic Logical Unit) directly which allow 2 registers to be accessed in one instruction in a clock cycle.
10. The Atmega2560 is a _____ SC Microcontroller.
a) RI
b) CI
c) AI
d) BI
View Answer
Explanation: The Atmega2560 is a RISC (Reduced Instruction Set Computer) microcontroller, which allows for a smaller number of cycles per instruction. Thus, making it faster than the CISC (Complex Instruction Set Computer) Architecture.
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