4 layers17.4 × 53.1 mm
Greenpill
Stary2001/greenpill
a samd51 dev board, mimicking the bluepill/blackpill stm32 board design
31 parts1
4 layers17.4 × 53.1 mm
Greenpill
Stary2001/greenpill1a samd51 dev board, mimicking the bluepill/blackpill stm32 board design
- Size
- 17.4 × 53.1 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 34
- Nets
- 66
- Pads
- 206
- Tracks, vias
- 555, 67
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 5 (file 20171130)
- Created
- 26 Jun 2020
- Updated
- 28 Sep 2020
Overview
Greenpill is an open-source printed circuit board by Stary2001, from the Stary2001/greenpill repository on GitHub. It is a 4-layer board of 17.4 × 53.1 mm with 34 parts on 66 nets, routed with 555 tracks and 67 vias.
It is built around the ATSAMD51J20A-MU, MIC5504-3.3YM5 and BAT54C. Its parts include 13 capacitors, 6 resistors, 4 connectors, 3 ICs and 3 diodes. It belongs with the microcontroller boards boards and the SAM D and SAM boards of this library.
Main components
3
ATSAMD51J20A-MU
QFN-64-EP(9x9)-40℃~+85℃ 1.71V~3.63V 120MHz 1MB 256KB 32 Bit 51 ARM Cortex-M4F Built-in FLASH Power-on reset (POR)、Undervoltage detection (BOR/LVD/LVR/LVI)、Watchdog reset、Built-in general-purpose timer、Hardware CRC、Calendar function、Built-in temperature sensor、Touch function、True random number generator (TRNG)、Hardware ECC check QFN-64-EP(9x9) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
MIC5504-3.3YM5
SOT-23-5-40℃~+125℃@(Tj) 1 120uVrms 15uA 180mV@(300mA) 3.3V 300mA 5.5V 75dB@(1kHz) Fixed Over Temperature Protection、Enable Positive SOT-23-5 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTECH PUBLICVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
BAT54C
SOT-231 Pair Common Cathode 200mA 2uA@25V 30V 600mA 800mV@100mA SOT-23 Schottky Diodes ROHSNexperiaSchottky Diodes
README
README.mdGreenpill
Breadboard-able SAMD51 development board
Inspired by the popular low-cost "Bluepill" and "Blackpill" STM32 boards, Greenpill aims to maintain some compatibility with those designs while adding features from the SAMD5x platform. Greenpill is designed to be used with CircuitPython, although a SAMD51 port of Arduino could also be used.
Features
- SAMD51J20A-M microcontroller
- Arm Cortex-M4 @ 120 MHz
- 8 USB endpoints – enough for CDC & MSC (for CircuitPython), and some extras (eg. AUDIO)
- Reversible USB Type-C connector supporting USB 2.0 data rates
- On-board user LED and button
- External 32.768 kHz crystal oscillator for RTC + clock source.
- Up to 13 PWM-capable pins usable simultaneously
- SPI flash footprint on underside - no pin conflicts with broken out pins (uses SERCOM2).
Flashing CircuitPython
- TODO: add UF2 bootloader instructions
- Build CircuitPython from the fork. Use the
atsamdport andBOARD=greenpill. - Enter the UF2 bootloader by double-tapping the RESET button on Greenpill
- You should now have a removable storage device called
CPYBOOT. CopyPATHTOUF2to the root directory of this device. Once it has finished copying,CPYBOOTwill disappear andGREENPILLwill appear. You have now installed CircuitPython.
Pin assignment
Pins are numbered counter-clockwise starting at the top-left pin (to the left of the USB-C connector).
| Greenpill Pin | GPIO name | Available SERCOMs* | Available PWM timers* | Comment |
|---|---|---|---|---|
| User LED | PB09 | - | TC4/WO[1] | |
| User Button | PB06 | - | - | Externally pulled up to 3v3 |
| VBat sense | PB03 | - | - | Connected to VBat via diode D3 |
| 1 | PA16 | SERCOM1/PAD[0] SERCOM3/PAD[1] | TCC1/WO[0] TCC0/WO[4] | |
| 2 | PA17 | SERCOM1/PAD[1] SERCOM3/PAD[0] | TC2/WO[1] TCC1/WO[1] TCC0/WO[5] | |
| 3 | PA18 | SERCOM1/PAD[2] SERCOM3/PAD[2] | TCC1/WO[2] TCC0/WO[6] | |
| 4 | PA19 | SERCOM1/PAD[3] SERCOM3/PAD[3] | TC3/WO[1] TCC1/WO[3] TCC0/WO[7] | |
| 5 | PB16 | SERCOM5/PAD[0] | TCC3/WO[0] TCC0/WO[4] | |
| 6 | PB01 | SERCOM5/PAD[3] | TC7/WO[1] | |
| 7 | PB00 | SERCOM5/PAD[2] | - | |
| 8 | PA24 | USB D- | ||
| 9 | PA25 | USB D+ | ||
| 10 | PA20 | SERCOM5/PAD[2] SERCOM3/PAD[2] | TCC1/WO[4] TCC0/WO[0] - | |
| 11 | PB22 | SERCOM1/PAD[2] SERCOM5/PAD[2] | ||
| 12 | PB23 | SERCOM1/PAD[3] SERCOM5/PAD[3] | TC7/WO[1] | |
| 13 | PA27 | - | - | |
| 14 | PB31 | SERCOM5/PAD[0] | TC0/WO[1] TCC4/WO[1] TCC0/WO[7] | |
| 15 | PA22 | SERCOM3/PAD[0] SERCOM5/PAD[1] | TCC1/WO[6] TCC0/WO[2] | |
| 16 | PB17 | SERCOM5/PAD[1] | TC6/WO[1] TCC3/WO[1] TCC0/WO[5] | |
| 17 | PB02 | SERCOM5/PAD[0] | TCC2/WO[2] | |
| 18 | 5V | |||
| 19 | Ground | |||
| 20 | 3.3V | |||
| 21 | VBat | |||
| 22 | PB04 | - | - | |
| 23 | PA03 | - | - | |
| 24 | PB30 | SERCOM5/PAD[1] | TCC4/WO[0] TCC0/WO[6] | |
| 25 | ¬Reset | |||
| 26 | PA02 | - | - | |
| 27 | PA08 | SERCOM4/PAD[0] | - | |
| 28 | PA05 | SERCOM0/PAD[1] | TC0/WO[1] | |
| 29 | PA07 | SERCOM0/PAD[3] | TC1/WO[1] | |
| 30 | PA06 | SERCOM0/PAD[2] | - | |
| 31 | PA04 | SERCOM0/PAD[0] | - | |
| 32 | PA09 | SERCOM0/PAD[1] | TC0/WO[1] TCC0/WO[1] TCC1/WO[5] | |
| 33 | PA10 | SERCOM0/PAD[2] | TCC0/WO[2] TCC1/WO[6] | |
| 34 | PB10 | SERCOM4/PAD[2] | TCC0/WO[4] TCC1/WO[0] | |
| 35 | PB11 | SERCOM4/PAD[3] | TC5/WO[1] TCC0/WO[5] TCC1/WO[1] | |
| 36 | PB12 | SERCOM4/PAD[0] | TCC3/WO[0] TCC0/WO[0] | |
| 37 | PB13 | SERCOM4/PAD[1] | TC4/WO[1] TCC3/WO[1] TCC0/WO[1] | |
| 38 | 3.3V | |||
| 39 | Ground | |||
| 40 | 5V |
* SERCOM2 and all TCn/WO[0] have been removed from this table. SERCOM2 is used by the SPI flash, and TCn/WO[0] timers are not usable for PWM output by CircuitPython. For a full reference of pin capability, see Table 6-1 in the SAM D5x datasheet
License
The contents of this repository, which include the Greenpill hardware, documentation, and design files, are released under the Solderpad 2.1 license. The recommended firmware for GreenPill (CircuitPython) is NOT part of this repository. Both Adafruit/CircuitPython and the fork that provides Greenpill compatibility are released under the MIT License
Parts
34| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C6, C9, C10, C13 |
| 2 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R6 |
| 2 | 10u | Capacitor_SMD:C_0603_1608Metric | C7, C8 |
| 2 | 12p | Capacitor_SMD:C_0603_1608Metric | C11, C12 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | Conn_01x20_Male | Connector_PinHeader_2.54mm:PinHeader_1x20_P2.54mm_Vertical | J1, J2 |
| 2 | LED | LED_SMD:LED_0603_1608Metric | D1, D2 |
| 2 | SW_Push | greenpill:PTS636 | SW1, SW2 |
| 1 | 261 | Resistor_SMD:R_0603_1608Metric | R3 |
| 1 | 4.7u | Capacitor_SMD:C_0603_1608Metric | C5 |
| 1 | 60.4 | Resistor_SMD:R_0603_1608Metric | R4 |
| 1 | ATSAMD51J20A-M | Package_DFN_QFN:QFN-64-1EP_9x9mm_P0.5mm_EP4.7x4.7mm | U1 |
| 1 | BAT54C | Package_TO_SOT_SMD:SOT-23 | D3 |
| 1 | Conn_01x04_Male | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Horizontal | J3 |
| 1 | Crystal_GND23 | Crystal:Crystal_SMD_3215-2Pin_3.2x1.5mm | Y1 |
| 1 | Ferrite_Bead_Small | Resistor_SMD:R_0603_1608Metric_Pad1.05x0.95mm_HandSolder | FB1 |
| 1 | MIC5504-3.3YM5 | Package_TO_SOT_SMD:SOT-23-5 | U2 |
| 1 | S25FL064 | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U3 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | J5 |
The 33 most common of 34 parts.
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Questions
How big is the Greenpill PCB?
It measures 17.4 × 53.1 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Greenpill use?
34 parts, built around the ATSAMD51J20A-MU, MIC5504-3.3YM5 and BAT54C. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the Greenpill KiCad files?
From the Stary2001/greenpill repository on GitHub, at the commit this page was made from: the board is 1.0/greenpill.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.
Can I use the Greenpill design in my own project?
Its repository states no licence, so its author keeps all rights: ask Stary2001 before reusing the design.