Описание
The ATmega8515 is a low-power CMOS 8-bit microcontroller based on the AVRenhanced RISC architecture. By executing powerful instructions in a single clock cycle,the ATmega8515 achieves throughputs approaching 1 MIPS per MHz allowing the systemdesigner to optimize power consumption versus processing speed. The AVR core combines a rich instruction set with 32 general purpose working registers.All the 32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowingtwo independent registers to be accessed in one single instruction executed in one clockcycle. The resulting architecture is more code efficient while achieving throughputs up toten times faster than conventional CISC microcontrollers.The ATmega8515 provides the following features: 8K bytes of In-System ProgrammableFlash with Read-While-Write capabilities, 512 bytes EEPROM, 512 bytes SRAM, anExternal memory interface, 35 general purpose I/O lines, 32 general purpose workingregisters, two flexible Timer/Counters with compare modes, Internal and External interrupts,a Serial Programmable USART, a programmable Watchdog Timer with internalOscillator, a SPI serial port, and three software selectable power saving modes. The Idlemode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and Interruptsystem to continue functioning. The Power-down mode saves the Register contents butfreezes the Oscillator, disabling all other chip functions until the next interrupt or hardwarereset. In Standby mode, the crystal/resonator Oscillator is running while the rest ofthe device is sleeping. This allows very fast start-up combined with low-powerconsumption. The device is manufactured using Microchip’s high density nonvolatile memory technology.The On-chip ISP Flash allows the Program memory to be reprogrammed In-Systemthrough an SPI serial interface, by a conventional nonvolatile memory programmer, orby an On-chip Boot program running on the AVR core. The boot program can use anyinterface to download the application program in the Application Flash memory. Softwarein the Boot Flash section will continue to run while the Application Flash section isupdated, providing true Read-While-Write operation. By combining an 8-bit RISC CPUwith In-System Self-programmable Flash on a monolithic chip, the Microchip ATmega8515is a powerful microcontroller that provides a highly flexible and cost effective solution tomany embedded control applications. The ATmega8515 is supported with a full suite of program and system developmenttools including: C Compilers, Macro assemblers, Program debugger/simulators, In-circuitEmulators, and Evaluation kits.
- High-performance, Low-power AVR® 8-bit Microcontroller
- RISC Architecture
- 130 Powerful Instructions
- Most Single Clock Cycle Execution
- 32 x 8 General Purpose Working Registers
- Fully Static Operation
- Up to 16 MIPS Throughput at 16 MHz
- On-chip 2-cycle Multiplier
- Nonvolatile Program and Data Memories
- 8K Bytes of In-System Self-programmable Flash Endurance: 10,000 Write/Erase Cycles
- Optional Boot Code Section with Independent Lock bits In-System Programming by On-chip Boot Program True Read-While-Write Operation
- 512 Bytes EEPROM Endurance: 100,000 Write/Erase Cycles
- 512 Bytes Internal SRAM
- Up to 64K Bytes Optional External Memory Space
- Programming Lock for Software Security
- Peripheral Features
- One 8-bit Timer/Counter with Separate Prescaler and Compare Mode
- One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
- Three PWM Channels
- Programmable Serial USART
- Master/Slave SPI Serial Interface
- Programmable Watchdog Timer with Separate On-chip Oscillator
- On-chip Analog Comparator
- Special Microcontroller Features
- Power-on Reset and Programmable Brown-out Detection
- Internal Calibrated RC Oscillator
- External and Internal Interrupt Sources
- Three Sleep Modes: Idle, Power-down and Standby
- I/O and Packages
- 35 Programmable I/O Lines
- 40-pin PDIP, 44-lead TQFP, 44-lead PLCC, and 44-pad QFN/MLF
- Operating Voltages
- 2.7 – 5.5V for ATmega8515L
- 4.5 – 5.5V for ATmega8515
- Speed Grades
- 0 – 8 MHz for ATmega8515L
- 0 – 16 MHz for ATmega8515
