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| 1 | # Atmel AVR | 1 | # Compatible Microcontrollers |
| 2 | 2 | ||
| 3 | QMK should run on any Atmel AVR processor with enough Flash. It has been tested on the following: | 3 | QMK runs on any USB-capable AVR or ARM microcontroller with enough flash space - generally 32kB or more, though it will *just* squeeze into 16kB with most features disabled. |
| 4 | 4 | ||
| 5 | * ATmega32U4 ([PJRC Teensy 2.0](http://www.pjrc.com/teensy/)) | 5 | ## Atmel AVR |
| 6 | * AT90USB1286 ([PJRC Teensy++ 2.0](http://www.pjrc.com/teensy/)) | ||
| 7 | * AT90USB1287 ([Atmel USBKEY](http://www.atmel.com/tools/AT90USBKEY.aspx)) | ||
| 8 | * ATmega168P with using [V-USB](http://www.obdev.at/products/vusb/index.html) | ||
| 9 | * ATmega328P with using [V-USB](http://www.obdev.at/products/vusb/index.html) | ||
| 10 | * ATmega32U2 | ||
| 11 | * AT90USB1286, 646, 647 should work | ||
| 12 | * AT90USB162 testing... | ||
| 13 | 6 | ||
| 14 | NOTE: To enable full features of firmware you'll need 32KB flash size. | 7 | The following use [LUFA](https://www.fourwalledcubicle.com/LUFA.php) as the USB stack: |
| 15 | 8 | ||
| 16 | Please add any tested microcontrollers to this list. | 9 | * [ATmega16U2](https://www.microchip.com/wwwproducts/en/ATmega16U2) / [ATmega32U2](https://www.microchip.com/wwwproducts/en/ATmega32U2) |
| 10 | * [ATmega16U4](https://www.microchip.com/wwwproducts/en/ATmega16U4) / [ATmega32U4](https://www.microchip.com/wwwproducts/en/ATmega32U4) | ||
| 11 | * [AT90USB64](https://www.microchip.com/wwwproducts/en/AT90USB646) / [AT90USB128](https://www.microchip.com/wwwproducts/en/AT90USB1286) | ||
| 17 | 12 | ||
| 18 | # ARM | 13 | Certain MCUs which do not have native USB will use [V-USB](https://www.obdev.at/products/vusb/index.html) instead: |
| 19 | 14 | ||
| 20 | You can also use any ARM processor that [ChibiOS](http://www.chibios.org) supports. The following processors have been tested: | 15 | * [ATmega32A](https://www.microchip.com/wwwproducts/en/ATmega32A) |
| 16 | * [ATmega328P](https://www.microchip.com/wwwproducts/en/ATmega328P) | ||
| 21 | 17 | ||
| 22 | * [Kinetis MKL26Z64](http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/l-series-ultra-low-power-m0-plus/kinetis-kl2x-48-mhz-usb-ultra-low-power-microcontrollers-mcus-based-on-arm-cortex-m0-plus-core:KL2x) | 18 | ## ARM |
| 23 | * [Kinetis MK20DX128](http://www.nxp.com/assets/documents/data/en/data-sheets/K20P64M50SF0.pdf) | 19 | |
| 24 | * [Kinetis MK20DX128](http://www.nxp.com/assets/documents/data/en/data-sheets/K20P64M50SF0.pdf) | 20 | You can also use any ARM chip with USB that [ChibiOS](http://www.chibios.org) supports. Most have plenty of flash. Known to work are: |
| 25 | * [Kinetis MK20DX256](http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/kinetis-cortex-m-mcus/k-series-performance-m4/k2x-usb/kinetis-k20-72-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-mcus-based-on-arm-cortex-m4-core:K20_72) | 21 | |
| 22 | ### STMicroelectronics (STM32) | ||
| 23 | |||
| 24 | * [STM32F0x2](https://www.st.com/en/microcontrollers-microprocessors/stm32f0x2.html) | ||
| 25 | * [STM32F103](https://www.st.com/en/microcontrollers-microprocessors/stm32f103.html) | ||
| 26 | * [STM32F303](https://www.st.com/en/microcontrollers-microprocessors/stm32f303.html) | ||
| 27 | |||
| 28 | ### NXP (Kinetis) | ||
| 29 | |||
| 30 | * [MKL26Z64](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/kl-series-cortex-m0-plus/kinetis-kl2x-72-96-mhz-usb-ultra-low-power-microcontrollers-mcus-based-on-arm-cortex-m0-plus-core:KL2x) | ||
| 31 | * [MK20DX128](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/k-series-cortex-m4/k2x-usb/kinetis-k20-50-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-based-on-arm-cortex-m4-core:K20_50) | ||
| 32 | * [MK20DX256](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/k-series-cortex-m4/k2x-usb/kinetis-k20-72-mhz-full-speed-usb-mixed-signal-integration-microcontrollers-mcus-based-on-arm-cortex-m4-core:K20_72) | ||
| 33 | |||
| 34 | ## Atmel ATSAM | ||
| 35 | |||
| 36 | There is limited support for one of Atmel's ATSAM microcontrollers, that being the [ATSAMD51J18A](https://www.microchip.com/wwwproducts/en/ATSAMD51J18A) used by the [Massdrop keyboards](https://github.com/qmk/qmk_firmware/tree/master/keyboards/massdrop). | ||