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Space exploration is undergoing a Renaissance, with exciting New missions such as the much-anticipated Artemis II, JAXA SLIM and Chandaaryan-3 moon landings, and New Space deployments in Low Earth Orbit (LEO). Designers need electronic components that meet strict radiation and reliability standards to meet the requirements of working in the harsh space environment. Microchip Technology announced the launch of a new radiation-resistant 32-bit microcontroller, the SAMD21RT. Based on radiation-resistant (RT) Arm Cortex-M0+ technology, the product comes in a 64-pin ceramic and plastic package with 128 KB of flash memory and 16 KB of SRAM.

The SAMD21RT is designed for space-constrained applications where size and weight requirements are extremely high, with a base area of only 10 mm x 10 mm. Running at frequencies up to 48 MHz, the SAMD21RT provides high-performance processing for harsh environments. The device integrates analog capabilities, including up to 20 channels of an analog-to-digital converter (ADC), a digital-to-analog converter (DAC), and an analog comparator.

The SAMD21RT device is based on Microchip's existing SAMD21 MCU family, which is widely used in industrial and automotive markets. The device also uses Commercial off-the-shelf (COTS) technology, which greatly simplifies the design process when transitioning to radiation-resistant devices because the design remains pin-compatible. Microchip offers a comprehensive range of system solutions for space applications, designing multiple devices around SAMD21RT microcontrollers, including FPgas, power and discrete devices, memory products, communication interfaces, and oscillators of various specifications.

To withstand harsh environments including radiation and extreme temperatures, the SAMD21RT operates in a temperature range of −40°C to 125°C and has a high level of radiation tolerance with a total ionization dose (TID) capability of up to 50 krad and single event latching (SEL) immunity of up to 78 MeV.cm2/mg.

"The advantage of working with us is that we have the history, knowledge and capability to design and test radiation-resistant devices in-house," said Bob Vampola, vice president of Microchip's Aerospace and Defense business unit. We will continue to introduce new technologies such as Ethernet, artificial intelligence and machine learning that have developed in the commercial and industrial markets and improve them with radiative performance to meet the needs of space missions. We will also continue to deliver higher computing performance and integrate newer technologies into smaller packages, reducing weight and size."

The SAMD21RT has low power consumption and features such as idle and standby sleep modes and sleepwalking peripherals. Other peripherals include a 12-channel Direct memory access controller (DMAC), a 12-channel event system, various control timers/counters (TCC), a 32-bit real-time counter (RTC), a watchdog timer (WDT), and a USB 2.0 interface. Communication options include Serial communication (SERCOM), I2C, SPI, and LIN.

With tens of thousands of components in orbit, Microchip has been an important part of the history of space exploration and is critical to today's and future space missions. As part of the Artemis program, Microchip's products are on their way to the Moon and have contributed to the successful development of the Space Launch System, the Orion spacecraft, the Lunar Gateway Space Station, the lunar lander, and the next generation of spacesuits. For more information about Microchip's space history, visit Microchip's Space Applications page.

Development tool

The SAMD21RT 32-bit MCU is powered by the SAMD21 Curiosity Nano evaluation Kit, the MPLAB X Integrated Development Environment (IDE), and the MPLAB PICkit™ 5 online debugger/programmer.

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