Questions tagged [8051]

Question 1

According to the DS CM6533, it has the following specifications: The CM6533 is a USB 2.0 audio chip built-in 8051 for flexible applications. Embedded 1T 8051 with 32K Byte SRAM and 512K Byte flash(...

Question 2

I’m building a USB IR blaster using a CH552T dev board, a Crowtail IR emitter, and an HS-S23B receiver connected to an ESP32. My goal is to send NEC protocol IR codes at 38 kHz using Timer2 for the ...

Question 3

I am trying to run following code on AT89C2051, using Keil for compiling and programming hex file with Superpro. ...

Question 4

Unable to solve the above question. Getting error A40:invalid register when running this code on XRL instruction: ...

Question 5

I'm working on a STC15W204S microcontroller, a small, cheap and capable 8051 microcontroller. So far, with the flexibility of SDCC, using the provided STCAI-ISP software and the datasheet (which is ...

Question 6

I am working on a ASK modulator and demodulator circuit which I wish to interface with a 8051 microcontroller to read serial data from demodulator circuit. The mod/demod circuit is developed and ...

Question 7

I’m trying to implement an automated parking lot using an 8051. I’m using stepper motors to function as gates at the entrance and the exit of the parking lot that open whenever the IR sensors placed ...

Question 8

Let's say we have this program: MOV R5, #4 H2: MOV R6, #10 H1: DJNZ R6, H1 DJNZ R5, H2 After moving the data to the registers, microcontroller executes ...

Question 9

In 8051, one of the bit, SM2 or the D5 or SCON.5, is about "Used for Multiprocessor Communication." I am not clear about it. I watched quite many tutorials or explanations about 8051 on ...

Question 10

Lets generate a square wave of 2mSec period using an AT89C51 microcontroller with timer0 in mode0 on the P1.0 pin of port1. Assume xtal oscillator frequency of 11.0592 MHz. ...

Question 11

I need to follow WS2812B protocol, which requires communication with very high speed, like 0.4μs, 0.45μs, etc. Can I achieve it with AT89C51?

Question 12

I have a strange problem and I don't know how to find a solution. I have a board with an AT89C51RD2 inside. I programmed it (thanks to Atmel flip), and it works fine. After some use (week or months), ...

Question 13

I'm designing a general-purpose PCB for a 8051-family MCU. I make it compatible to use shields for the Arduino Uno. There is a snag with the reset circuitry, as an Arduino is active-low reset and the ...

Question 14

I'm working on a project where I'm using 8051 microcontroller as a primary microcontroller which is interfacing with 4 relays. I have tested relays with two of my arduinos but when it comes to AT89S52 ...

Question 15

I have this 8051: I have acquired an it from an old device and I want to program it. I have experience with AVR, ESP, and STM microcontrollers, but not with 8051's. Googling info about this DIP IC, I'...

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Questions tagged [8051]

CM6533 USB-codec internal 8051 MCU

Why does my CH552T NEC IR sender sometimes produce incorrect codes on an ESP32 receiver?

AT89C2051 programming procedure

Keil uVision 5: stuck on question of assembly code for 8051 microcontroller to implement a logic circuit [closed]

Is this EEPROM write procedure on STC microcontrollers correct? Any alternative?

Why 8051 is not detecting logic from circuit's voltage?

Why is this 8051 ASM code not working?

Number of iterations in nested loop (8051)

What is Multiprocessor Communication in 8051, and how to use it?

Timer0 mode0 delay calculation for 11.0592 MHz crystal in 8051, ie, AT89C51

0.1μs delay for AT89C51

AT89C51RD2 Empty or don't start up erratically

Inverting Arduino reset signal

Relay with AT89S52 microcontroller

Programming an 8051 MCU (Topro TP2808)

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