AT16

AT16 is a designation used in several technical product lines, but is most commonly associated with Atmel's AVR 8-bit microcontroller line, notably the ATmega16. The ATmega16 is a member of the ATmega family designed for embedded applications with moderate processing needs. It uses the AVR RISC architecture, emphasizing a simple instruction set and a single-cycle execute for most instructions, enabling straightforward programming in C or assembly.

On-chip resources typically include program memory in the form of flash, data memory (SRAM), and non-volatile storage (EEPROM). The device provides multiple general-purpose I/O pins and a set of peripherals such as timers, PWM outputs, a serial interface (USART/UART), SPI, and a two-wire interface (I2C/TWI). An analog-to-digital converter and interrupt system are commonly included. Because of its feature mix, the ATmega16 has been used in educational kits, hobbyist projects, and lightweight embedded systems.

Development is supported by Atmel Studio (now Microchip Studio), along with open-source toolchains like avr-gcc, avrdude for programming, and a broad ecosystem of third-party evaluation boards. The ATmega16 has since been superseded by newer AVR devices offering enhanced memory, speed, and peripheral options, but it remains a reference point for understanding the early AVR architecture.