1 Features and Pinout
Features of MCU and Curiosity Nano, Board Layout Picture, Board Block Diagram, Pinout Diagram.
1.1 ATtiny3227 Key Features
The tinyAVR® 2 family of microcontrollers use the AVR® CPU with hardware multiplier, running at up to 20 MHz, with 32 KB Flash, 3 KB of SRAM, and 256B of EEPROM. The family uses the latest technologies from Microchip with a flexible and low-power architecture, including an Event System, advanced digital peripherals, and accurate analog features such as a 12-bit differential ADC with Programmable Gain Amplifier (PGA).
- Running at up to 20 MHz
- Single Cycle I/O Access
- Two-level Interrupt Controller
- Sleep modes: Idle, Standby, Power-down
- Six channels Event System
- Configurable Custom Logic (CCL)
- Single-pin programming and debugging interface (UPDI)
- 12-bit Differential ADC with Programmable Gain Amplifier (PGA)
- Analog Comparator with internal DAC reference
- 1x 16-bit Timer/Counter type A (TCA)
- 2x 16-bit Timer/Counter type B (TCB)
- 1x 16-bit Real Time Counter (RTC) with Periodic Interrupt Controller (PIT)
- Power-On Reset (POR)
- Brown-Out-Detection (BOD)
- Voltage Level Monitor (VLM)
- Cyclic Redundancy Check (CRC) Scan
- Watchdog Timer (WDT) with Window Mode
- Serial communication interfaces: SPI, I2C, 2x USART
1.2 Board Features
- ATtiny3227 Microcontroller
- USB Type-C® Connector
- One Yellow User LED
- One Mechanical User Switch
- One green power and status LED
- Footprint for 32.768 kHz Crystal
- On-Board Debugger support in Microchip MPLAB® X IDE:
- Board identification
- Virtual serial port (CDC)
- Programming and debugging
- Two debug GPIO channels (DGI GPIO)
- USB Powered
- Adjustable Target Voltage:
- MIC5353 LDO regulator controlled by the on-board debugger
- 1.8–5.1V output voltage (limited by USB input voltage)
- 500 mA maximum output current (limited by ambient temperature and output voltage)
1.3 Board Overview
1.4 Block Diagram
1.5 Pinout
All the ATtiny3227 I/O pins are accessible at the edge connectors on the board. The image below shows the board pinout. Refer to the I/O Multiplexing and Considerations section in the ATtiny3227 data sheet for all available functions on each pin.