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Questions and Answers
The 8085 microprocessor operates with a main input power-supply pin called ______.
Vcc
The range of unsigned 4-bit numbers goes from 0000 to ______.
1111
The maximum power dissipation for the Vcc pin is ______ watts.
1.5
In signed representation, the minimum 4-bit number is ______.
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The 8085 microprocessor uses a ______ pin for ground connection to avoid ground-interference.
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The 8085 microprocessor operates on a ______-pin DIP IC.
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For 8-bit unsigned numbers, the maximum value is ______.
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The word length for unsigned representation in a 4-bit microprocessor is ______.
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The higher order byte is indicated when ALE equals ______.
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A total of ______ locations can be addressed with 16 bits.
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In the I/O/M functions, a low signal on WR indicates that the microprocessor is ______ to memory.
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The machine cycle for Opcode Fetch is indicated by S0 = ______ and S1 = 1.
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The two clock-input signals are connected across a crystal RC/LC circuit of ______ Frequency.
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READY = 0 means that the microprocessor is ______.
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The first ______ of frequency is supplied to the microprocessor.
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RESET OUT is an Active-High Output System-Reset ______ Signal.
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HLDA is used to acknowledge a hold request from an ______.
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The RESET OUT signal sends a Low-State Signal to RESET − ______ to reset the internal structure.
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CLK is used for synchronization between the microprocessor and the ______.
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After receiving the Acknowledgement-Signal from RESET-OUT, the Reset-Signal RESET − IN resets the HLDA ______ and other components.
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The Arithmetic & Logic unit is part of the typical structure of a ______.
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To indicate that the microprocessor has been reset, the RESET − IN goes to High-State and RESET-OUT goes to ______ State.
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The RESET-OUT signal lasts an integral number of ______ Periods.
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The purpose of the RESET OUT signal is to reset the microprocessor along with its connected ______.
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(0110)2 = 0 × 2^3 + 1 × 2^2 + 1 × 2^1 + 0 × 2^0 = 0 + 4 + 2 + 0 = ___ in decimal.
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Every hexadecimal number can be represented by ___ bits of binary numbers.
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(1010110101100101)2 is grouped by ___ bits for hexadecimal representation.
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(0xAD65)16 indicates that the number is in hexadecimal format and represents ___ in binary.
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1024 Bytes is equivalent to ___ KB.
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In a binary system, 8 bits are collectively referred to as a ___.
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(AB)16 = A × 16^1 + B × 16^0 = ___ in decimal.
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(1010)2 = 1 × 2^3 + 0 × 2^2 + 1 × 2^1 + 0 × 2^0 = ___ in decimal.
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1024 MB is equal to ___ GB.
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Hexadecimal uses ___ unique symbols to represent values.
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The decimal number system uses a base of ______.
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In the binary number system, there are ______ symbols.
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The hexadecimal number system has a base of ______.
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In binary representation, the decimal number 5 is shown as ______.
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The hexadecimal equivalent of the decimal number 10 is ______.
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In the decimal system, the digit '9' represents the ______ place.
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Binary digits are a basis for digital ______ processing.
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The binary representation of the decimal number 8 is ______.
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The hexadecimal system uses the letters ______ to represent values above 9.
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The significance of binary digits includes representing ______ states.
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Study Notes
Number Systems
- Decimal (Base 10) uses 10 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9.
- Binary (Base 2) uses 2 symbols: 0, 1.
- Hexadecimal (Base 16) uses 16 symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F.
- Number systems are used to represent different systems.
Decimal Representation
- Decimal numbers are represented by positional values, where each position represents a power of 10.
- For example, the number 123 is represented as 1 x 10^2 + 2 x 10^1 + 3 x 10^0.
Binary Representation
- Each binary digit (bit) can be either 0 or 1, representing "off" or "on" states.
- 4 bits are grouped together to form a nibble.
- 8 bits form a byte.
- Binary numbers are used to represent data and instructions in computers.
Hexadecimal Representation
- Hexadecimal numbers are used for representing binary numbers in a more compact format.
- Each hexadecimal digit corresponds to 4 bits of binary.
- It simplifies working with large binary numbers by using fewer digits.
Conversion Between Number Systems
- Binary to Decimal: Each bit in the binary number is multiplied by its corresponding power of 2, and the results are summed up.
- Decimal to Binary: Repeatedly divide the decimal number by 2 and write down the remainder until the quotient is 0. The remainders, read from bottom to top, form the binary equivalent.
- Hexadecimal to Decimal: Each hexadecimal digit is multiplied by its corresponding power of 16, and the results are summed up.
- Decimal to Hexadecimal: Repeatedly divide the decimal number by 16 and write down the remainder until the quotient is 0. The remainders, read from bottom to top, form the hexadecimal equivalent.
8085 Microprocessor
- This is an 8-bit microprocessor, meaning it can process data in units of 8 bits (a byte).
- Its architecture contains the following key components:
- Registers: Small memory locations within the processor used for storing data and instructions.
- Arithmetic and Logic Unit (ALU): Performs calculations and logical operations.
- Timing and Control Unit: Synchronizes operations and manages the processor's internal functions.
- System Bus: Interconnects the different components of the processor.
- An 8085 microprocessor can access up to 64KB (65,536 bytes) of memory.
Pin Diagram of 8085 Microprocessor
- VCC (Pin 40): Supplies the main power supply voltage (5V) to the microprocessor.
- VSS (Pin 20): Provides the ground reference for the microprocessor.
- X1 & X2 (Pin 1 & 2): Clock input pins that are connected to a crystal oscillator to generate the timing signals for the microprocessor.
- RESET OUT / IN (Pin 3 & 36): Inputs a reset signal to initialize the microprocessor to its original state.
- A8-A15 (Pins 21 to 28): Address bus pins used to select the memory location or input/output devices.
- ALE (Pin 31): The Address Latch Enable signal.
- IO/M (Pin 19): Indicates whether the microprocessor is communicating with memory (0) or I/O devices (1).
- WR (Pin 30): The Write signal controls data transfer from the microprocessor to memory or I/O devices.
- RD (Pin 32): The Read signal controls data transfer from memory or I/O devices to the microprocessor.
- READY (Pin 33): Indicates whether an I/O device is ready to receive or send data.
- HOLD (Pin 16): Allows external devices to request access to the system bus.
- HLDA (Pin 15): Indicates that the microprocessor has granted access of the bus to an external device.
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Description
This quiz covers different number systems including decimal, binary, and hexadecimal. Learn how each system represents numbers and the significance of positional values in decimal representation. Test your knowledge about the basics of number systems used in computing.
