
Wild Spy Open Source Timer
Wild-Spy/OSTBoardHardware
Hardware design for the Open Source Timer board.

The ATSAMD21E16B-MU is a microcontroller made by Microchip Technology in a QFN-32-EP(5x5) package with 33 pins. -40℃~+85℃ 1.62V~3.6V 10bit 12bit 26 32 Bit 48MHz 64KB 8KB ARM Cortex-M0+ Built-in FLASH QFN-32-EP(5x5) Microcontrollers (MCU/MPU/SOC) ROHS.
PCBKit's library has its KiCad symbol (MCU_Microchip_SAMD:ATSAMD21E16B-M, from KiCad's library) and its footprint (Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm, from KiCad's library), ready for a KiCad board. 18 are in stock at JLCPCB (part C614241). 4 open-source boards in 3 repositories on GitHub use it.
| Pin | Name | Type |
|---|---|---|
| 1 | PA00 | Input/output |
| 2 | PA01 | Input/output |
| 3 | PA02 | Input/output |
| 4 | PA03 | Input/output |
| 5 | PA04 | Input/output |
| 6 | PA05 | Input/output |
| 7 | PA06 | Input/output |
| 8 | PA07 | Input/output |
| 9 | VDDANA | Power in |
| 10 | GND | Power in |
| 11 | PA08 | Input/output |
| 12 | PA09 | Input/output |
| 13 | PA10 | Input/output |
| 14 | PA11 | Input/output |
| 15 | PA14 | Input/output |
| 16 | PA15 | Input/output |
| 17 | PA16 | Input/output |
| 18 | PA17 | Input/output |
| 19 | PA18 | Input/output |
| 20 | PA19 | Input/output |
| 21 | PA22 | Input/output |
| 22 | PA23 | Input/output |
| 23 | PA24 | Input/output |
| 24 | PA25 | Input/output |
| 25 | PA27 | Input/output |
| 26 | RESET | Input |
| 27 | PA28 | Input/output |
| 28 | GND | Passive |
| 29 | VDDCORE | Power out |
| 30 | VDDIN | Power in |
| 31 | PA30 | Input/output |
| 32 | PA31 | Input/output |
| 33 | EP | Passive |

Wild-Spy/OSTBoardHardware
Hardware design for the Open Source Timer board.



<iframe src="https://pcbkit.io/embed/parts/microchip/ATSAMD21E16B-MU" title="ATSAMD21E16B-MU in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/microchip/ATSAMD21E16B-MU.jpg" alt="ATSAMD21E16B-MU" width="1200" height="900">[](https://pcbkit.io/parts/microchip/ATSAMD21E16B-MU)Yes. The symbol is MCU_Microchip_SAMD:ATSAMD21E16B-M and the footprint Package_DFN_QFN:QFN-32-1EP_5x5mm_P0.5mm_EP3.6x3.6mm, both drawn on this page. PCBKit places them on a board for you when you design with it.
QFN-32-EP(5x5), with 33 pins. Its footprint is drawn on this page.
Microchip Technology publishes it: the Datasheet link on this page opens it.
JLCPCB lists it as part C614241, with 18 in stock; the sellers' links on this page open their listings.
Parts like it in the library: the ATSAMD21E18A-MUT by Microchip Technology, the ATSAML21E18B-MU by Microchip Technology, the ATSAMD21E17D-MU by Microchip Technology and the ATSAMD21E16B-MF by Microchip Technology. Check their datasheets: a part that fits the footprint may still differ in its ratings.
4 boards in 3 repositories on GitHub; the most starred are listed on this page, with their KiCad files.