Microchip Technology AVR32EA28/32/48 Microcontrollers

Microchip Technology AVR32EA28/32/48 Microcontrollers are part of the AVR® EA Family that implement the AVR CPU with hardware multiplier running at clock speeds up to 20MHz. The AVR EA Family utilizes modern technologies from Microchip with a flexible and low-power architecture, including Event System, accurate analog subsystems, and advanced digital peripherals.

The Microchip devices are available with 32KB of Flash, 4KB of SRAM, and 512 bytes of EEPROM. Furthermore, the AVR32EA28/32/48 MCUs are housed in 28-, 32- or 48-pin packages.

Features

AVR® CPU
- Running at up to 20MHz
- Single-cycle I/O register access
- 2-level interrupt controller
- 2-cycle hardware multiplier
- 1.8V to 5.5V supply voltage range
Memories
- 32KB in-system-programmable Flash memory with a true read-while-write operation
- 4KB SRAM
- 512B EEPROM
- 64B of user row in nonvolatile memory that can keep data during chip-erase and be programmed while the device is locked
- Write/erase endurance
  - Flash at 10,000 cycles
  - EEPROM at 100,000 cycles
- 40-years data retention at +55°C
System
- Power-on Reset (POR) circuit
- Brown-out Detector (BOD) with user-programmable levels
- Voltage Level Monitor (VLM) with interrupt at a programmable level above the BOD level
- Clock Failure Detection (CFD)
- Clock options:
  - High-precision internal oscillator with selectable frequency up to 20MHz (OSCHF) and auto-tuning for improved internal oscillator accuracy
  - Internal ultra-low power 32.768kHz oscillator (OSC32K)
  - External 32.768kHz crystal oscillator (XOSC32K)
  - External clock input
  - External high-frequency crystal oscillator with clock failure detection (XOSCHF)
- Single-pin Unified Program and Debug Interface (UPDI)
- 3x sleep modes
  - Idle with all peripherals running for immediate wake-up
  - Standby with a configurable operation of selected peripherals
  - Power-Down with full data retention
Temperature Ranges
- Industrial at -40°C to +85°C ambient
- Extended at -40°C to +125°C ambient

Peripherals
- 2x 16-bit Timer/Counters Type A (TCA) with 3x compare channels for PWM and waveform generation
- 4x 16-bit Timer/Counters Type B (TCB) with input capture for capture and signal measurements
- 1x 16-bit Real-Time Counter (RTC) that can run from an external crystal or internal oscillator
- 3x USARTs with fractional baud rate generator, auto-baud, and start-of-frame detection
- 1x host/client Serial Peripheral Interface (SPI)
- 1x 2-Wire Interface (TWI) with dual address match
  - Independent host and client operation (Dual mode)
  - Philips I²C compatible
  - Standard-mode (Sm, 100kHz)
  - Fast-mode (Fm, 400kHz)
  - Fast-mode Plus (Fm+, 1MHz)
- Event System for CPU-independent and predictable inter-peripheral signaling
- Configurable Custom Logic (CCL) with up to 4x programmable Look-up Tables (LUTs)
- 1x 12-bit, 375ksps, differential Analog-to-Digital Converter (ADC), includes a Programmable Gain Amplifier (PGA), 1x to 16x gain on the input signal
- 1x 10-bit Digital-to-Analog Converter (DAC)
- 2x Analog Comparators (ACs) with window compare functions
- Multiple voltage references (VREF)
  - 1.024V
  - 2.048V
  - 2.500V
  - 4.096V
  - VREFA
  - V_DD
- Automated Cyclic Redundancy Check (CRC) Flash program memory scan
- Watchdog Timer (WDT) with Window mode and separate on-chip oscillator
- External interrupt on all general-purpose pins
I/O and Packages:
- 24x to 42x programmable I/O pins
- 28-pin VQFN 4mm x 4mm, SPDIP and SSOP
- 32-pin VQFN 5mm x 5mm and TQFP 7mm x 7mm
- 48-pin VQFN 6mm x 6mm and TQFP 7mm x 7mm