描述 Description

The high-performance Microchip picoPower 8-bit AVR RISC-basedmicrocontroller combines 32kB ISP flash memory with read-while-writecapabilities, 1kB EEPROM, 2kB SRAM, 39 general purpose I/O lines, 32general purpose working registers, five flexible timer/counters withcompare modes, internal and external interrupts, three USARTs withwake-up on start of transmission, two byte-oriented 2-wire serialinterface, two SPI serial ports, one 8-channel 10-bit ADC with optionaldifferential input stage with programmable gain, programmable watchdogtimer with internal oscillator, a JTAG (IEEE 1149.1 compliant) testinterface for on-chip debugging and programming, and six softwareselectable power saving modes. The device operates between 2.7-5.5volts.
The ATmega324PB features the successful QTouch PeripheralTouch Controller (PTC). The PTC acquires signals in order to detecttouch on capacitive sensors, and supports both self- andmutual-capacitance sensors. The ATmega324PB PTC is supported by theMicrochip QTouch Composer development tool (QTouch Library projectbuilder and QTouch Analyzer). It provides a faster and less complexcapacitive touch implementation in any application.
It supports 32buttons in self-capacitance mode, or up to 256 buttons inmutual-capacitance mode. Mix-and-match mutual-and self-capacitancesensors is possible. Only one pin is required per electrode and noexternal components are required, giving savings on the BOM costcompared to competing solutions.
By executing powerfulinstructions in a single clock cycle, the device achieves throughputsapproaching 1 MIPS per MHz, balancing power consumption and processingspeed.

特性 Features

·Advanced RISC Architecture·131 Powerful Instructions
·Most Single Clock Cycle Execution
·32 x 8 General Purpose Working Registers
·Fully Static Operation
·Up to 16 MIPS Throughput at 16MHz
·On-Chip 2-Cycle Multiplier

·High Endurance Non-Volatile Memory Segments·32KBytes of In-System Self-Programmable Flash program memory
·1KBytes EEPROM
·2KBytes Internal SRAM
·Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
·Data retention: 20 years at 85°C
·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

·JTAG (IEEE std. 1149.1 Compliant) Interface·Boundary-Scan Capabilities According to the JTAG Standard
·Extensive On-chip Debug Support
·Programming of Flash, EEPROM, Fuses, and Lock Bits Through the JTAG Interface

·Peripheral Features·Peripheral Touch Controller (PTC)·Capacitive Touch Buttons, Sliders and Wheels
·32 Self-Cap Channels and 256 Mutual Cap Channels

·Two 8-bit Timer/Counters with Separate Prescaler and Compare Mode
·Three 16-bit Timer/Counters with Separate Prescaler, Compare Mode, and Capture Mode
·Real Time Counter with Separate Oscillator
·Ten PWM Channels
·8-channel 10-bit ADC·Differential Mode with Selectable Gain at 1×, 10× or 200×

·Three Programmable Serial USARTs
·Two Master/Slave SPI Serial Interfaces
·Two Byte-Oriented 2-Wire Serial Interfaces (Philips I2C 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
·Clock Failure Detection Mechanism and Switch to Internal 1MHz RC Oscillator in case of Failure
·Individual Serial Number to Represent a Unique ID

·I/O and Packages·39 Programmable I/O Lines
·44-pin TQFP and 44-pin Wettable Flank QFN

·Operating Voltage:·2.7 - 5.5V

·Temperature Range:·-40°C to 105°C

·Speed Grade:·0 - 8MHz @ 2.7 - 5.5.V
·0 - 16MHz @ 4.5 - 5.5V

·Power Consumption at 1MHz, 2.7V, 25°C·Active Mode: 0.32mA
·Power-Down Mode: 0.2μA
·Power-Save Mode: 1.3μA (Including 32kHz RTC)