Description
Product Overview
The USBASP USBISP 51 AVR Programmer Downloader is a professional-grade, high-performance in-system programmer designed for 51 and AVR series microcontrollers. Based on the open-source USBASP project, this programmer connects to your computer via a standard USB port and uses the ISP (In-System Programming) protocol to flash firmware, erase chips, and configure fuse bits without removing the target microcontroller from its circuit .
Whether you are developing embedded systems, working on Arduino projects (burning bootloaders), or programming AT89S51/52 or AVR chips like ATmega and ATtiny series, this programmer delivers fast, stable, and reliable performance. With an adjustable ISP programming speed of up to 8MHz, it supports both 5V and 3.3V target systems .
Equipped with a 500mA self-recovery fuse, this programmer protects your computer’s USB port from accidental short circuits on the target board . The 90° right-angle cable design allows for easy connection to development boards in tight spaces. The onboard power and programming status LEDs provide real-time visual feedback during operation .
Key Features
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USB 2.0 Full-Speed Interface: 12Mbps communication speed for fast program uploads, compatible with USB 1.1 and 2.0 .
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Broad Microcontroller Support: Programs 51 series (AT89S51, AT89S52, etc.) and all AVR ISP chips (ATmega, ATtiny series) .
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Adjustable ISP Speed: Auto-speed control firmware automatically tracks the target chip’s frequency (supports up to 8MHz programming clock) .
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Dual Voltage Compatibility: Supports both 5V and 3.3V target board logic levels (selectable via jumper) .
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500mA Overcurrent Protection: Built-in self-recovery fuse (resettable fuse) protects both the programmer and your computer’s USB port from short circuits .
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Standard IDC 10-Pin Interface: 2×5 pin ISP connector for connection to target boards, with a 90° right-angle cable included .
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LED Status Indicators: Power indicator (lights when USB connected) and programming activity indicator .
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Self-Upgradable Firmware: The programmer can be updated to support future devices via the ISP interface .
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Cross-Platform Compatibility: Works with Windows (XP through 11), Linux, and macOS. Supported by AVRDUDE, AVRStudio, Arduino IDE, ProgISP, and AVR_Fighter software .
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Main Chip | ATmega8A / ATmega88 / ATmega168 |
| Supported Voltage | 3.3V / 5V (Selectable via Jumper) |
| USB Interface | USB 2.0 (Full Speed, 12Mbps) |
| Programming Interface | ISP (6-Pin / 10-Pin Standard) |
| Maximum ISP Speed | Up to 8MHz |
| Protection | 500mA Self-Recovery Fuse |
| Operating System Support | Windows XP/Vista/7/8/10/11, Linux, macOS |
| Supported Software | ProgISP, AVR_Fighter, AVRDUDE, AVR Studio, Arduino IDE |
| Target VCC | Yes (Programmer can power target board up to 500mA) |
| Indicator LEDs | Power (PWR) / Status (Programming Activity) |
| Board Dimensions | Approx. 65mm × 25mm × 10mm |
| Cable Length | Approx. 50cm (90° Right-Angle Connector) |

















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