通通

AT89S52 microcontroller and AVR microcontroller download line

Overview

J1 is used to select the programming speed. When the clock of the target chip is lower than 1.5MHz , J1 needs to be shorted to enter low-speed programming.

Write mode to ensure successful programming. The default setting is J1 short circuit, which makes programming chips very stable, including S51 series and AVR

series of microcontrollers.

J2 is used to select the power supply. When J2 is shorted, the development board draws power from the USB port, which is 5V . When J2 is open, the target board

Independent power supply, please be careful not to short-circuit J2 when the target board has independent power supply ! ! Otherwise, the USB AVR may be burned.

ISPs and target boards and even computer motherboards! !

J3 can be used to program and control the main control chip ATMEGA8 of the USB AVR ISP . When J3 is short-circuited, it can be

External programmers, such as STK200 , USB AVR ISP , etc., are used to program the M8 on this USB AVR ISP . They are generally used when upgrading the USB AVR ISP . ( If J3 is short-circuited during use , the USB download cable will not be available ) .

Driver installation diagram:

Connect the USB download cable to the computer and a new hardware prompt will appear to install the driver as shown in the figure.

Design Files

All reference designs on this site are sourced from major semiconductor manufacturers or collected online for learning and research. The copyright belongs to the semiconductor manufacturer or the original author. If you believe that the reference design of this site infringes upon your relevant rights and interests, please send us a rights notice. As a neutral platform service provider, we will take measures to delete the relevant content in accordance with relevant laws after receiving the relevant notice from the rights holder. Please send relevant notifications to email: bbs_service@eeworld.com.cn.

It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

Hot

Technical Resources More

Search Datasheet?

Supported by EEWorld Datasheet

Technical Videos More

Forum More

Update:2025-06-19 21:14:03

BMW original fault detector (GT1) maintenance
A friend of mine has a broken GT1. It started with a power supply failure because a gong cap on the wireless network card socket fell off, shorting something and burning the 3.3V power supply circuit.
Understand some selection methods of switching power supply MOS tubes
[color=black] MOS tubes are probably most commonly used as switching elements in power supplies, but they also have great benefits for power output. Applications such as servers and communications equ
The M4 board applied to TI will be available in early November.
I ordered it on the 15th, but I won’t receive it until early November. Will it be shipped from the United States?
Please, how can I adjust the brightness based on scanning and lighting the light?
As the title says, my microcontroller now has 5 IO ports controlling 10 lights. Only one of the 5 IO ports has PWM function, which is port P57 in the figure below. Now the lights are lit by scanning.
TCPMP full screen automatic browsing picture problem
Call tcpmp in your own shell program to browse pictures. In full-screen mode, slide show, if you switch from a large picture to a small picture, the previous picture will always remain on the edge and
Out of the remaining new image sensor chip MT9D111
Quantity 93 Price 800 Package PLCC32[url=https://2.taobao.com/item.htm?spm=2007.1000622.0.0.MkvFX4&id=565431369960]Xianyu Address[/url]

Datasheet More

Circuits More