Atmel AT89C5131A 8051 Microcontroller, 32kB Flash, 52-pin LCC

The Atmel AT89C5131A is an 8-bit 8051 microcontroller with 32kB flash memory, built on an 80C52X2 core with full-speed USB 1.1 connectivity. It brings the 80C51 architecture into a surface-mount, USB-enabled package and extends the 80C52 feature set with expanded RAM, a dual data pointer, a 16-bit up/down timer and a programmable counter array.

Overview

The device executes instructions in six clock cycles and reaches clock speeds of up to 48 MHz, synthesised by an on-chip oscillator and analogue PLL. Its memory comprises 32kB of flash EEPROM with in-system programming via USB, a 3kB bootloader flash, 1kB of data EEPROM and 1024 bytes of on-chip expanded RAM (ERAM).

Key Features

• 8-bit 80C52X2 core executing instructions in six clock cycles
• Full-speed USB 1.1 with in-system programming via USB
• 34 I/O pins
• SPI, UART and 400kBps TWI (I2C) interfaces
• Four-level priority interrupt system
• Four direct-drive LED outputs with programmable current sources
• Idle and power-down modes with wake-up from USB events or external interrupts
• Integrated power monitor (POR/PFD) supervising the internal power supply

Operating Conditions

The microcontroller operates within an industrial temperature range of -40°C to +85°C and a supply voltage of 2.7V to 5.5V. It is supplied in a surface-mount LCC package with 52 pins, which supports straightforward integration into PCB designs.

Dimensions and Weight

Width: 3.3, Depth: 1.5, Height: 4.3, Weight: 0.2 g.

Applications

This device is intended for a wide range of industrial and embedded control applications, as well as USB-enabled 8051 designs that require a 16-bit timer, a programmable counter array and multiple serial interfaces.

Choose the Atmel AT89C5131A when a USB-enabled 8051 microcontroller with 32kB flash memory and 34 I/O pins is required for industrial or embedded control projects.