6

ATL25SeriesASIC

1414C–ASIC-08/02

Macro Cores

AVR 8-bit RISC

Microcontroller

Core

The AVR RISC microcontroller is a true 8-bit RISC architecture, ideally suited for embedded

control applications. The AVR is offered as a gate level, synthesizable macro core in the

ATL25 family.

The AVR supports a powerful set of 120 instructions. The AVR prefetches an instruction dur-

ing a prior instruction execution, enabling the execution of one instruction per clock cycle.

The Fast Access RISC register file consists of 32 general purpose working registers. These 32

registers eliminate the data transfer delay in the traditional program code intensive accumula-

tor architectures.

The AVR can incorporate up to 64 x 16K program memory (ROM) and 64 x 8K data memory

(SRAM). Among the peripheral options offered are: UART, 8-bit timer/counter, 16-bit

timer/counter, programmable watchdog timer and SPI.

Figure 3. AVR 8-bit RISC Microcontroller Core

16 bit