描述 Description

The AT90S4414 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture. By executing powerful instructions in a single clock cycle, the AT90S4414 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.

The AVR core is based on an enhanced RISC architecture that combines a rich instruction set with 32 general purpose working registers. All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving throughputs up to ten times faster than conventional CISC microcontrollers. (continued)

特性 Features

? AVR? - High Performance and Low Power RISC Architecture

? 118 Powerful Instructions - Most Single Clock Cycle Execution

? 4K bytes of In-System Reprogrammable Flash

– SPI Serial Interface for Program Downloading

– Endurance: 1,000 Write/Erase Cycles

? 256 bytes EEPROM

– Endurance: 100,000 Write/Erase Cycles

? 256 bytes Internal SRAM

? 32 x 8 General Purpose Working Registers

? 32 Programmable I/O Lines

? Programmable Serial UART

? SPI Serial Interface

? VCC: 2.7 - 6.0V

? Fully Static Operation

– 0 - 8 MHz, 4.0 - 6.0V

– 0 - 4 MHz, 2.7 - 4.0V

? Up to 8 MIPS Throughput at 8 MHz

? One 8-Bit Timer/Counter with Separate Prescaler

? One 16-Bit Timer/Counter with Separate Prescaler and Compare and Capture Modes

? Dual PWM

? External and Internal Interrupt Sources

? Programmable Watchdog Timer with On-Chip Oscillator

? On-Chip Analog Comparator

? Low Power Idle and Power Down Modes

? Programming Lock for Software Security