Table of Contents
What is the use of AT89C51 microcontroller?
The AT89C51 is a low-power, high-performance CMOS 8-bit microcomputer with 4K bytes of Flash programmable and erasable read only memory (PEROM). The device manufacturing uses Atmel’s high-density non-volatile memory technology and is compatible with the industry-standard MCS-51 instruction set and pinout.
Is 8051 and AT89C51 the same?
The AT89C51 is an age old 8-bit microcontroller from the Atmel family. It works with the popular 8051 architecture and hence is used by most beginners till date. The AT89C51 is no longer in production and Atmel does not support new design. …
What is AT89C2051?
The AT89C2051 is a low-voltage, high-performance CMOS 8-bit microcomputer with 2K bytes of Flash programmable and erasable read-only memory (PEROM). The device is manufactured using Atmel’s high-density nonvolatile memory technology and is compatible with the industry-standard MCS-51 instruction set.
When the microcontroller executes some arithmetic operations then the flag bits which register are affected of?
5. When the microcontroller executes some arithmetic operations, then the flag bits of which register are affected? Explanation: It stands for program status word. It consists of carry, auxiliary carry, overflow, parity, register bank select bits etc which are affected during such operations.
What is the difference between AT89C51 and at89s51?
The only difference between the the 89c51 and 89s51 is that the 89s51 and all S series chips can be programmed through both the ISP port and parallel port. But the 89c51 can be programmed only through parallel programmer.
What is the difference between microprocessor and Microcontroller?
KEY DIFFERENCES Microprocessor consists of only a Central Processing Unit, whereas Micro Controller contains a CPU, Memory, I/O all integrated into one chip. Microprocessor uses an external bus to interface to RAM, ROM, and other peripherals, on the other hand, Microcontroller uses an internal controlling bus.
What is clock frequency in AT89C51 microcontroller?
8 Bit MCU, 8051 Family AT89C51 Series Microcontrollers, 40 MHz, 32 KB, 1 KB, 44 Pins, VQFP.
What is the difference between microprocessor and microcontroller?
How do I program my 89c2051?
The Atmel AT89C2051 is an 8051-based Fully Static 24MHz CMOS controller with 15 I/O Lines, 2 Timers/Counters, 6 Interrupts/2 Priority Levels, Analog Comparator, LED Drive Outputs, UART, Two-level Program Memory Lock, 2K Bytes Flash Memory, 128 Bytes On-chip RAM. MICETEK International Inc.
What is the clock source for the timers?
1. What is the clock source for the timers? Explanation: Timer’s clock source is the crystal that is applied to the controller.
Why do we need a ULN2803 in driving a relay?
We need a ULN2803 for driving a relay because more current is generally required for driving a relay that is generally not provided by a micro controller, so we need a ULN2803 to increase the current limit.
Which instruction have no effect on the flag of PSW?
7. Which instructions have no effect on the flags of PSW? Explanation: These instructions are the arithmetic operations and the flags are affected by the data copy instructions, so all these instructions don’t affect the bits of the flag.