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下面提供对AT90S1200A单片机的基本功能特征介绍：
The AT90S1200 is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the AT90S1200 achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize power consumption versus processing speed.
The AVR core combines a rich instruction set with the 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.
Features
Utilizes the AVR? RISC Architecture
AVR – High-performance and Low-power RISC Architecture
– 89 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General-purpose Working Registers
– Up to 12 MIPS Throughput at 12 MHz
Data and Nonvolatile Program Memory
– 1K Byte of In-System Programmable Flash
Endurance: 1,000 Write/Erase Cycles
– 64 Bytes of In-System Programmable EEPROM
Endurance: 100,000 Write/Erase Cycles
– Programming Lock for Flash Program and EEPROM Data Security
Peripheral Features
– One 8-bit Timer/Counter with Separate Prescaler
– On-chip Analog Comparator
– Programmable Watchdog Timer with On-chip Oscillator
– SPI Serial Interface for In-System Programming
Special Microcontroller Features
– Low-power Idle and Power-down Modes
– External and Internal Interrupt Sources
– Selectable On-chip RC Oscillator for Zero External Components
Specifications
– Low-power, High-speed CMOS Process Technology
– Fully Static Operation
Power Consumption at 4 MHz, 3V, 25°C
– Active: 2.0 mA
– Idle Mode: 0.4 mA
– Power-down Mode: <1 μA
I/O and Packages
– 15 Programmable I/O Lines
– 20-pin PDIP, SOIC and SSOP
Operating Voltages
– 2.7 - 6.0V (AT90S1200-4)
– 4.0 - 6.0V (AT90S1200-12)
Speed Grades
– 0 - 4 MHz, (AT90S1200-4)
– 0 - 12 MHz, (AT90S1200-12)
