ATMEL AT89C5131A 8051 Microcontroller, 32KB Flash, 52LCC

The ATMEL AT89C5131A-S3SUM is a high-performance, 8-bit microcontroller that brings the power of the 80C51 architecture into a modern, full-speed USB-enabled package. This advanced device builds upon the trusted 80C52 feature set, adding 1024 bytes of on-chip expanded RAM (ERAM), a dual data pointer, a 16-bit up/down timer, and a programmable counter array, making it ideal for a wide range of industrial and embedded control applications.

Featuring a robust 80C52X2 core that executes instructions in just six clock cycles, the AT89C5131A delivers efficient processing with clock speeds of up to 48MHz, synthesized by an on-chip oscillator and analogue PLL. The device includes 32kB of flash EEPROM with in-system programming capability via USB, a 3kB bootloader flash, and 1kB of data EEPROM, ensuring ample memory for complex programs and data storage.

This microcontroller is designed with versatility and power efficiency in mind. It offers 34 I/O pins, a comprehensive set of interfaces including SPI, UART, and a 400kBps TWI (I2C), and a sophisticated 4-level priority interrupt system. Four direct-drive LED outputs with programmable current sources are also integrated, simplifying indicator designs. Power management is handled through idle and power-down modes, with full wake-up capability from USB events or external interrupts, and an integrated power monitor (POR/PFD) supervises the internal power supply at all times.

The AT89C5131A operates within an industrial temperature range of -40°C to +85°C and a supply voltage from 2.7V to 5.5V, making it a reliable choice for demanding environments. Its surface-mount LCC package and 52-pin configuration ensure straightforward integration into your PCB design. This microcontroller is a perfect solution for developers seeking a feature-rich, USB-enabled 8051 device for their next project.

Key Features:

• High-performance 8-bit 80C52X2 core
• Full-speed USB 1.1 and