4 layers100 × 70 mm
ZSWatch Watch DevKit
ZSWatch/Watch-DevKit-HW
The hardware repo for the ZSWatch Development Kit.
132 parts188GPL-3.0
6 layers50 × 50 mm
The board which is based on STM32F446ZE MCU in BGA with the external SDRAM and BMI270 IMU.
- Size
- 50 × 50 mm
- Copper layers
- 6
- Thickness
- 1.56 mm
- Parts
- 63
- Nets
- 144
- Pads
- 374
- Tracks, vias
- 2,698, 200
- Pours
- 643
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 18 Dec 2022
- Updated
- 29 May 2023
Overview
Base board is an open-source printed circuit board by ValentiWorkLearning, from the ValentiWorkLearning/stm32f4_sdram_baseboard repository on GitHub. It is a 6-layer board of 50 × 50 mm with 63 parts on 144 nets, routed with 2,698 tracks and 200 vias.
It is built around the BMI270. Its parts include 23 capacitors, 13 resistors, 7 ICs, 3 diodes and 3 connectors. It belongs with the STM32 boards of this library.
Main components
1README
README.mdstm32f4_sdram_baseboard
The board which is based on STM32F446ZE MCU in BGA with the external SDRAM and BMI270 IMU.
Parts
63| Qty | Value | Footprint | References |
|---|---|---|---|
| 17 | 100nF | Capacitor_SMD:C_0603_1608Metric | C1, C2, C3, C4, C5, C6, C7, C8, C10, C11, C12, C16, C19, C20, C22, C23 +1 |
| 6 | 10K | Resistor_SMD:R_0603_1608Metric | R1, R2, R3, R6, R7, R10 |
| 4 | MountingHole | MountingHole:MountingHole_3.2mm_M3 | H1, H2, H3, H4 |
| 4 | TestPoint | TestPoint:TestPoint_Pad_D3.0mm | TP1, TP2, TP3, TP4 |
| 3 | 1uF | Capacitor_SMD:C_0603_1608Metric | C15, C18, C21 |
| 3 | 510 | Resistor_SMD:R_0603_1608Metric | R11, R12, R13 |
| 3 | LED | LED_SMD:LED_0603_1608Metric | D1, D2, D3 |
| 3 | SolderJumper_3_Open | Jumper:SolderJumper-3_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3 |
| 2 | 10p | Capacitor_SMD:C_0603_1608Metric | U5, U6 |
| 2 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C13, C14 |
| 2 | 4.7K | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | 5.1k | Resistor_SMD:R_0603_1608Metric | R4, R5 |
| 1 | 10nF | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | BMI270 | BMI270:XDCR_BMI270 | U3 |
| 1 | Conn_01x04 | Connector_PinHeader_2.54mm:PinHeader_1x04_P2.54mm_Vertical | J3 |
| 1 | Conn_01x06 | Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical | J2 |
| 1 | Conn_ARM_JTAG_SWD_20 | Connector_PinSocket_2.54mm:PinSocket_2x10_P2.54mm_Vertical | J1 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | INDUCTOR | Inductor_SMD:L_0603_1608Metric | L1 |
| 1 | IS42S16400J-xT | Package_SO:TSOP-II-54_22.2x10.16mm_P0.8mm | U2 |
| 1 | LD3985M33R_SOT23 | Package_TO_SOT_SMD:SOT-23-5 | U7 |
| 1 | STM32F446ZEJx | Package_BGA:UFBGA-144_10x10mm_Layout12x12_P0.8mm | U1 |
| 1 | SW_Push | Button_Switch_SMD:SW_Push_1P1T_NO_6x6mm_H9.5mm | SW1 |
| 1 | USB_C_Receptacle_USB2.0 | project_typec:USB_C_Receptacle_XKB_U262-16XN-4BVC11 | U4 |
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Questions
How big is the Base board PCB?
It measures 50 × 50 mm and has 6 copper layers, 1.56 mm thick.
What parts does the Base board use?
63 parts, built around the BMI270. 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 Base board KiCad files?
From the ValentiWorkLearning/stm32f4_sdram_baseboard repository on GitHub, at the commit this page was made from: the board is base_board/base_board.kicad_pcb and its schematic base_board/base_board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Base board design in my own project?
Its repository states no licence, so its author keeps all rights: ask ValentiWorkLearning before reusing the design.