ATmega128A Development Board with JTAG and ISP Headers
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Prices updated: 12 Oct 2026
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About this product
A small, low-cost DIP development board built around the ATmega128A 8-bit AVR microcontroller. It features USB Type-A power input, a reset switch, clearly marked I/O pins, a standard ISP header and a JTAG header for programming and debugging. Two LEDs on PA0 and PA1 allow quick testing.
Specifications
- Microcontroller
- ATmega128A (8-bit AVR)
- Flash memory
- 128 KB
- SRAM
- 4 KB
- EEPROM
- 4 KB
- Power input
- USB Type-A
- Programming headers
- ISP and JTAG
- Reset
- Reset switch
- Indicator LEDs
- 2 LEDs on PA0 and PA1
Frequently asked questions
Do I need a separate programmer?
Yes. The ISP header works with an AVR ISP programmer such as USBasp, and the JTAG header needs a JTAG-capable debugger such as an AVR JTAG ICE.
Does JTAG use any I/O pins?
Yes. On the ATmega128A the JTAG interface uses Port F (PF4 to PF7), so those pins are not available for general I/O while JTAG is enabled.
