Microchip Technology ATSTK600-SC21

Overview

ATSTK600-SC21 from Microchip Technology (formerly Atmel) is a full-featured development and debugging platform for the AT32UC3L016/032/064 family of 32-bit AVR UC microcontrollers. It supports on-chip debug via JTAG and aWire, provides hardware-accelerated capacitive touch evaluation, integrates a 32kHz crystal oscillator and DFLL tuning reference, and enables real-time trace with NanoTrace through the RESET pin. It is used for rapid prototyping of ultra-low-power embedded control systems with integrated QTouch® capacitive sensing.

For engineers reviewing the ATSTK600-SC21 datasheet, ATSTK600-SC21 pinout, ATSTK600-SC21 application, or ATSTK600-SC21 equivalent, this board delivers validated hardware support for evaluating picoPower® operation modes, SleepWalking peripheral event triggering, secure FlashVault library integration, and multi-channel PWM-driven LCD backlight or motor control - all using the AT32UC3L064 target MCU mounted on-board.

Technical Context

The ATSTK600-SC21 is a dedicated STK600-compatible socketed evaluation platform configured specifically for the AT32UC3L064 in 48-pin TQFP package. It includes pre-mounted target MCU, onboard debugger (JTAG/aWire), programmable clock sources (32kHz XTAL, DFLL reference), and dedicated capacitive touch sensor pads interfaced to the CAT module's CSA/CSB channels.

It implements full Nexus Class 2+ debug infrastructure, enabling non-intrusive runtime control, program/data trace, and single-pin aWire access muxed with RESET_N. The board routes all 36 GPIOs, five high-drive pins, ADC inputs, TWI/SPI/USART signals, and PWM outputs to accessible headers - preserving full peripheral DMA, Peripheral Event System, and MPU/SAU functionality of the target device.

Key Specifications

Availability

ATSTK600-SC21 is available at Aetrix Electronics and suitable for embedded control development, capacitive touch UI validation, low-power RTOS integration, and industrial sensor node prototyping requiring stable component supply and long-term toolchain continuity.

Supply support for ATSTK600-SC21 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology acquired Atmel in 2016 and maintains full support for the AVR32 UC product line, including documentation, tools, and firmware libraries.

The ATSTK600-SC21 belongs to the STK600 modular development platform family, designed explicitly to accelerate evaluation and firmware development for Atmel's picoPower® 32-bit AVR UC microcontrollers with integrated security, capacitive touch, and ultra-low-power peripherals.

FAQ

What is the primary target microcontroller supported by the ATSTK600-SC21?

The ATSTK600-SC21 is configured and validated for the AT32UC3L064 - a 64KB Flash, 16KB SRAM, 50MHz 32-bit AVR UC microcontroller in 48-pin TQFP package. It also supports AT32UC3L032 and AT32UC3L016 variants via socket replacement, but the board's default firmware, clock configuration, and touch layout are optimized for the AT32UC3L064. The ATSTK600-SC21 includes all necessary power regulation, clocking, and debug infrastructure to run AT32UC3L064 out-of-box.

Does the ATSTK600-SC21 support both JTAG and aWire debug interfaces?

Yes, the ATSTK600-SC21 fully supports both JTAG and aWire debug protocols for the AT32UC3L064. The aWire interface uses the RESET_N pin as a single-wire bidirectional channel, enabling full Nexus Class 2+ debug capabilities - including non-intrusive trace, runtime control, and memory access - without occupying dedicated debug pins. JTAG remains available via standard 10-pin header for use with external debuggers or when aWire is disabled.

How is capacitive touch evaluation implemented on the ATSTK600-SC21?

The ATSTK600-SC21 includes dedicated PCB-mounted capacitive touch sensor pads wired directly to the CAT module's CSA and CSB pins of the AT32UC3L064. These pads support QTouch® acquisition for up to 17 self-capacitive or 16×8 mutual-capacitive sensors. The board enables hardware-accelerated touch detection, autonomous wakeup from sleep modes, and seamless integration with the official QTouch Library - allowing immediate evaluation of buttons, sliders, and wheels without external components.

Can the ATSTK600-SC21 be used to evaluate ultra-low-power features like SleepWalking?

Yes, the ATSTK600-SC21 provides complete hardware support for evaluating SleepWalking and other picoPower® features of the AT32UC3L064. It routes all required signals - including peripheral event triggers (EVTI_N/EVTO_N), asynchronous timer (AST) inputs, and wake-capable GPIOs - to accessible test points and headers. The onboard 32kHz crystal and DFLL reference allow precise low-power timing validation, and the board's power monitoring enables accurate current measurement down to nanoamp levels during deep-sleep states.

Is FlashVault technology and Secure State operation testable on the ATSTK600-SC21?

Yes, the ATSTK600-SC21 enables full validation of FlashVault technology and Secure State execution on the AT32UC3L064. The board supports programming of secure libraries into protected Flash regions, and its debug infrastructure allows verification of MPU/SAU-enforced memory isolation. Developers can load secure code into the AT32UC3L064's locked sections and confirm that non-secure software cannot read or execute it - validating end-product IP protection before mass production.