Описание
The ATmega48P is a low-power CMOS 8-bit microcontroller based on the AVRenhanced RISC architecture. By executing powerful instructions in a single clock cycle, theATmega48P 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 the32 registers are directly connected to the Arithmetic Logic Unit (ALU), allowing two independentregisters to be accessed in one single instruction executed in one clock cycle. The resultingarchitecture is more code efficient while achieving throughputs up to ten times faster than conventionalCISC microcontrollers. The ATmega48P/88P/168P provides the following features: 4K/8K/16Kbytes of In-System ProgrammableFlash with Read-While-Write capabilities, 256/512/512bytes EEPROM,512/1K/1Kbytes SRAM, 23 general purpose I/O lines, 32 general purpose working registers,three flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmableUSART, a byte-oriented, 2-wire Serial Interface, an SPI serial port, a 6-channel 10-bit ADC (8 channels in TQFP and QFN/MLF packages), a programmable Watchdog Timer withinternal Oscillator, and five software selectable power saving modes. The Idle mode stops theCPU while allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI port, andinterrupt system to continue functioning. The Power-down mode saves the register contents butfreezes the Oscillator, disabling all other chip functions until the next interrupt or hardware reset.In Power-save mode, the asynchronous timer continues to run, allowing the user to maintain atimer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops theCPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise duringADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the restof the device is sleeping. This allows very fast start-up combined with low power consumption. Microchip offers the QTouch library for embedding capacitive touch buttons, sliders and wheelsfunctionality into AVR microcontrollers. The patented charge-transfer signal acquisition offersrobust sensing and includes fully debounced reporting of touch keys and includes Adjacent KeySuppression (AKS) technology for unambiguous detection of key events. The easy-to-useQTouch Suite toolchain allows you to explore, develop and debug your own touch applications. The device is manufactured using Microchip’s high density non-volatile memory technology. TheOn-chip ISP Flash allows the program memory to be reprogrammed In-System through an SPIserial interface, by a conventional non-volatile memory programmer, or by an On-chip Boot programrunning on the AVR core. The Boot program can use any interface to download theapplication program in the Application Flash memory. Software in the Boot Flash section willcontinue to run while the Application Flash section is updated, providing true Read-While-Writeoperation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on amonolithic chip, the Microchip ATmega48P/88P/168P is a powerful microcontroller that provides ahighly flexible and cost effective solution to many embedded control applications. The ATmega48P/88P/168P AVR 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 Atmel® AVR® 8-Bit Microcontroller
- Advanced RISC Architecture
- 131 Powerful Instructions
- Most Single Clock Cycle Execution
- 32 x 8 General Purpose Working Registers
- Fully Static Operation
- Up to 20 MIPS Throughput at 20 MHz
- On-chip 2-cycle Multiplier
- High Endurance Non-volatile Memory Segments
- 4/8/16KBytes of In-System Self-Programmable Flash progam memory
- 256/512/512Bytes EEPROM
- 512/1K/1KBytes Internal SRAM
- Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
- Data retention: 20 years at 85°C/100 years at 25°C(1)
- Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation
- Programming Lock for Software Security
- QTouch® library support
- Capacitive touch buttons, sliders and wheels
- QTouch and QMatrix acquisition
- Up to 64 sense channels
- Peripheral Features
- Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
- One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture Mode
- Real Time Counter with Separate Oscillator
- Six PWM Channels
- 8-channel 10-bit ADC in TQFP and QFN/MLF package Temperature Measurement
- 6-channel 10-bit ADC in PDIP Package Temperature Measurement
- Programmable Serial USART
- Master/Slave SPI Serial Interface
- Byte-oriented 2-wire Serial Interface (Philips I2 C compatible)
- Programmable Watchdog Timer with Separate On-chip Oscillator
- On-chip Analog Comparator
- Interrupt and Wake-up on Pin Change
- Special Microcontroller Features
- Power-on Reset and Programmable Brown-out Detection
- Internal Calibrated Oscillator
- External and Internal Interrupt Sources
- Six Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby
- I/O and Packages
- 23 Programmable I/O Lines
- 28-pin PDIP, 32-lead TQFP, 28-pad QFN/MLF and 32-pad QFN/MLF
- Operating Voltage:
- 1.8 – 5.5V for ATmega48P/88P/168PV
- 2.7 – 5.5V for ATmega48P/88P/168P
- Temperature Range:
- -40°C to 85°C
- Speed Grade:
- ATmega48P/88P/168PV: 0 – 4MHz @ 1.8 – 5.5V, 0 – 10MHz @ 2.7 – 5.5V
- ATmega48P/88P/168P: 0 – 10MHz @ 2.7 – 5.5V, 0 – 20MHz @ 4.5 – 5.5V
- Low Power Consumption at 1MHz, 1.8V, 25°C:
- Active Mode: 0.3mA
- Power-down Mode: 0.1µA
- Power-save Mode: 0.8µA (Including 32kHz RTC)
