• High Performance, Low Power 32-bit AVR® Microcontroller
• 128Kbytes, and 64Kbytes Versions Internal High-Speed Flash
• 16Kbytes, Internal High-Speed SRAM, Single-Cycle Access at Full Speed
• Memory Controller (MC)
• 64-pin and 48-pin TQFP/QFN (51 and 35 GPIO Pins)
• One Synchronous Serial Controller (SSC)
• Device 2.0 full speed and low speed
• Three 16-bit Timer/Counter (TC) Channels
• 7 PWM Channels (PWMA)
• Three Universal Synchronous/Asynchronous Receiver/Transmitters (USART)
• One Master/Slave Serial Peripheral Interfaces (SPI) with Chip Select Signals
• One Master and One Slave Two-Wire Interfaces (TWI), 400kbit/s I2C-compatible
• One 8-channel Analog-To-Digital Converter (ADC)
• One Inter-IC Sound Controller (IISC) with Stereo Capabilities
• Autonomous Capacitive Touch Button (QTouch®) Capture
• One Programmable Glue Logic Controller(GLOC) for General Purpose PCB Design
• One 8-channel Analog-To-Digital Converter (ADC)
• Up to 61 DMIPS Running at 48MHz from Flash (1 Flash Wait State)
• Up to 34 DMIPS Running at 24MHz from Flash (0 Flash Wait State)
• On-Chip Non-Intrusive Debug System
• Nexus Class 2+, Runtime Control
• aWire™ Single-Pin Programming and Debug Interface Muxed with Reset Pin

32-bit AVR microcontroller featuring 128KB Flash, 16KB SRAM and Capacitive Touch Module.

All of the QTouch channels can operate in a DMA-driven mode, known as DMATouch, that allows touch and proximity detection without CPU intervention. The same feature can be used to wake up the device from low-power sleep modes upon touch or proximity.

This reduces the power consumption and gives greater performance. The UC3D devices deliver 61 Dhrystone MIPS (DMIPS) at 48 MHz. The UC3D is pin compatible with the UC3B series which offer an upgrade path for UC3D requiring more performance.

Please Note: ATUC128D4 is considered a "Legacy" product and Not Recommended for New Designs – Please See our SAM and PIC32 families for equivalent solutions.