Atmel AT89C5131 Microcontroller Development Board

AT89C5131 Evab_2:0.0 Development Board is an 8051‑class USB development platform built around the Atmel AT89C5131/AT89C5131A microcontroller. It provides a full‑speed USB device interface via an on‑board USB module that supports USB 1.1 and 2.0 communications, enabling direct prototyping of USB peripherals. The MCU contains 32 KB of ISP Flash ROM for program storage and 1280 bytes of RAM, with 34 I/O lines, three 16‑bit timers, an enhanced UART, and SPI support, delivering a robust feature set for embedded USB applications. This board exposes essential interfaces for rapid experimentation with USB‑enabled control systems, data logging, HID or custom USB devices, and educational demonstrations of 8051‑based USB development. The Evab 2.0 revision reflects an evolution in the AT89C5131 development ecosystem, aligning with Atmel’s tooling and standard in‑system programming workflows.