ATMEGA48PB-AN

ATmega48PB/88PB/168PB 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 ATmega48PB/88PB/ 168PB achieves throughputs approaching 1MIPS/MHz, allowing the system designer 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), 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. The ATmega48PB/88PB/168PB provides the following features: 4/8/16Kbytes of In-System Programmable Flash with Read-While-Write capabilities, 256/512/512 bytes EEPROM, 512/1K/1Kbytes SRAM, 27 general purpose I/O lines, 32 general purpose working registers, three flexible Timer/Counters with compare modes, internal and external interrupts, a serial programmable USART, a byte-oriented 2- wire Serial Interface (I²C), an SPI serial port, a 6-channel 10-bit ADC (8 channels in TQFP and VFQFN packages), a programmable Watchdog Timer with internal Oscillator, and six software selectable power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, USART, 2-wire Serial Interface, SPI port, and interrupt system to continue functioning. The Power-down mode saves the register contents but freezes 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 a timer base while the rest of the device is sleeping. The ADC Noise Reduction mode stops the CPU and all I/O modules except asynchronous timer and ADC, to minimize switching noise during ADC conversions. In Standby mode, the crystal/resonator Oscillator is running while the rest of the device is sleeping. This allows very fast start-up combined with low power consumption. It offers the QTouch® library for embedding capacitive touch buttons, sliders and wheels functionality into AVR microcontrollers. The patented charge-transfer signal acquisition offers robust sensing and includes fully debounced reporting of touch keys and includes Adjacent Key Suppression® (AKS technology) for unambiguous detection of key events. The easy-to-use QTouch Composer allows programers to explore, develop and debug the their touch applications

Key features

• Advanced RISC architecture
• 131 instructions – most single clock cycle execution
• 32 x 8 general purpose working registers
• Fully static operation
• Up to 20MIPS throughput at 20MHz
• On-chip 2-cycle Multiplier
• High endurance non-volatile memory segments
• 4/8/16KBytes of in-system self-programmable Flash program 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
• Optional boot code section with independent lock bits
• In-system programming by on-chip boot program
• True Read-While-Write (RWW) 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 (TC) with separate prescaler and compare mode
• 16-bit Timer/Counter with separate prescaler, compare mode, and capture mode
• Real Time Counter (RTC) with separate oscillator
• Six Pulse Width Modulation (PWM) channels
• 8-channel 10-bit Analog-to-Digital converter (ADC) with temperature measurement
• Programmable serial USART with start-of-frame detection
• Master/Slave Serial Interface (SPI)
• Byte-oriented Two-Wire serial Interface (TWI), Philips I²C compatible
• Programmable Watchdog Timer (WDT) with separate on-chip oscillator
• On-chip Analog Comparator (AC)
• Interrupt and Wake-up on pin change
• 256-channel capacitive touch and proximity sensing
• Special microcontroller features
• Power-On Reset (POR) and programmable brown-out detection (BOD)
• Internal calibrated oscillator
• External and internal interrupt sources
• Six Sleep Modes: Idle, ADC Noise Reduction, Power-Save, Power-Down, Standby, and Extended Standby
• Unique device ID
• I/O 27 programmable I/O pins
• Packages 32-pin TQFP, VFQFN
• Operating voltage 1.8V – 5.5V
• Temperature range -40°C to 105°C
• Speed grades 0 - 4MHz at 1.8-5.5V 0 - 10MHz at 2.7-5.5.V 0 - 20MHz at 4.5-5.5V
• Power consumption at 1MHz, 1.8V, 25°C
• Active mode: 0.35mA
• Power-down mode: 0.23μA
• Power-save mode: <1.4μA (including 32kHz RTC)