UEFI
About the UEFI PCB
UEFI is an open source STM32 PCB design by Churrosoft, published on GitHub under the CERN-OHL-S-2.0 license. It is a 4-layer board measuring 99 × 113 mm, with 228 components from 72 distinct parts.
Its main chip is the MCZ33810EK, from the STM32 family. Other key parts include the 74HC4851, STM32F407VGTx, MIC2940A-3.3WU, MIC2940A-5.0WT and LT4363IMS. By type, the board carries 77 resistors, 54 capacitors, 30 diodes, 16 ICs, 16 transistors and 14 fuses.
From the project
Coleccion de PCB y planos recomendados para montar una OpenEFI
si quieres usar otra placa basada en Arduino (Uno, Mega,DUE,etc), puedes hacerlo, pero los pcb no te serviran y capaz tengas que modificar ligeramente el codigo y el mapeo de los pines, proximamente agregare mas pcb ademas de mejorar los existentes
This source is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE.
Main components on the UEFI
UEFI bill of materials (BOM)
228 components, 72 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | MCZ33810EK | SOP65P1030X245-33N | U1 |
| 1 | 74HC4851 | SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | STM32F407VGTx | LQFP-100_14x14mm_P0.5mm | U3 |
| 1 | MIC2940A-3.3WU | TO-263-3_TabPin2 | U4 |
| 1 | MIC2940A-5.0WT | TO-220-3_Vertical | U5 |
| 1 | LT4363IMS | MSOP-12_3x4mm_P0.65mm | U6 |
| 1 | 25LCxxx | SOIC-8_5.275x5.275mm_P1.27mm | U7 |
| 2 | OPA340NA | SOT-23-5 | U9, U12 |
| 1 | TJA1042T3118 | HTSOP-8-1EP_3.9x4.9mm_P1.27mm_EP2.4x3.2mm | U15 |
| 2 | TPL7407LAPWR | TSSOP-16_4.4x5mm_P0.65mm | U20, U22 |
| 1 | PaP_Driver_v1 | IC_DRV8825_STEPPER_MOTOR_DRIVER_CARRIER | U23 |
| 2 | LM321 | SOT-23-5 | U27, U31 |
| 1 | MAX9926UAEE+ | SOP63P602X175-16N | U36 |
| 4 | ISL9V5045S3ST | TO-263-2 | Q1, Q2, Q3, Q4 |
| 4 | SS8050 | SOT-23 | Q5, Q8, Q9, Q11 |
| 2 | IRLZ44N | TO-220-3_Vertical | Q6, Q7 |
| 1 | IRF540N | TO-220-3_Vertical | Q10 |
| 5 | AO3400A | SOT-23 | Q12, Q13, Q14, Q15, Q16 |
| 1 | 25MHz | Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | USB_B | USB_B_OST_USB-B1HSxx_Horizontal | J1 |
Show 52 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Tag connect | Tag-Connect_TC2030-IDC-FP_2x03_P1.27mm_Vertical | J2 |
| 1 | Conn_02x08_Odd_Even | PinHeader_2x08_P1.27mm_Vertical | J4 |
| 1 | Conn_01x03 | PinHeader_1x03_P2.54mm_Vertical | J5 |
| 14 | 750mA | Fuse_0805_2012Metric | F1, F2, F3, F4, F5, F6, F7, F8 +6 |
| 5 | SolderJumper_2_Open | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2, JP3, JP23, JP24 |
| 1 | Jumper_NO_Small | SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP4 |
| 1 | ~ | SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm_NumberLabels | JP5 |
| 1 | vr/hall | SolderJumper-3_P1.3mm_Bridged2Bar12_Pad1.0x1.5mm_NumberLabels | JP11 |
| 1 | Jumper_NC_Small | SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | JP12 |
| 1 | SW_Push | SW_SPST_TL3342 | SW1 |
| 6 | TestPoint_Alt | TestPoint_THTPad_1.0x1.0mm_Drill0.5mm | TP10, TP11, TP12, TP13, TP14, TP15 |
| 9 | LED | LED_0603_1608Metric | D1, D5, D6, D7, D8, D9, D10, D12 +1 |
| 2 | 1N4148 | D_SOD-523 | D2, D3 |
| 1 | SMAJ58CA | D_SMA | D4 |
| 1 | MM3Z24VT1G | D_SOD-323 | D11 |
| 17 | K26 | D_SOD-323 | D14, D15, D16, D17, D18, D19, D20, D21 +9 |
| 17 | 100nF | C_0805_2012Metric | C1, C5, C9, C10, C11, C12, C13, C14 +9 |
| 2 | 15pF | C_0805_2012Metric | C2, C3 |
| 7 | 0.22uF | C_0603_1608Metric | C4, C35, C38, C44, C46, C48, C49 |
| 1 | 1uF | C_0805_2012Metric | C6 |
| 2 | 2.2uF | C_0805_2012Metric | C7, C8 |
| 1 | 4.7uF | C_0805_2012Metric | C16 |
| 5 | 10pF | C_0603_1608Metric | C18, C19, C20, C21, C22 |
| 8 | 10nF | C_0603_1608Metric | C23, C24, C25, C26, C27, C28, C29, C30 |
| 2 | 100uF ±20% 35V | CP_Elec_6.3x7.7 | C31, C42 |
| 1 | 47nF | C_0603_1608Metric | C33 |
| 7 | 0.01uF | C_0805_2012Metric | C41, C52, C53, C54, C55, C56, C57 |
| 1 | 240pF | C_0603_1608Metric | C51 |
| 2 | 120R | R_1206_3216Metric | R1, R28 |
| 12 | 10k | R_0603_1608Metric | R2, R49, R50, R51, R52, R53, R54, R58 +4 |
| 9 | 4.7k | R_0603_1608Metric | R3, R4, R5, R24, R25, R26, R27, R29 +1 |
| 2 | 100R | R_0603_1608Metric | R6, R7 |
| 1 | 0.02R | R_2512_6332Metric | R8 |
| 4 | 4.02k | R_0603_1608Metric | R9, R10, R11, R12 |
| 4 | 36K | R_0603_1608Metric | R13, R14, R15, R16 |
| 1 | 10K 1/10W | R_0603_1608Metric | R17 |
| 3 | 10R 1/10W | R_0603_1608Metric | R18, R20, R33 |
| 1 | 1M 1/10W | R_0603_1608Metric | R19 |
| 1 | 0.01R | R_1210_3225Metric | R21 |
| 1 | 57.6K 1/10W | R_0603_1608Metric | R22 |
| 1 | 4.99K 1/10W | R_0603_1608Metric | R23 |
| 3 | 1k | R_0603_1608Metric | R31, R32, R34 |
| 1 | 100k | R_0603_1608Metric | R35 |
| 6 | 2.49k +-1% | R_0603_1608Metric | R36, R37, R40, R41, R44, R45 |
| 9 | 470R | R_0603_1608Metric | R38, R39, R42, R43, R47, R48, R56, R62 +1 |
| 1 | 0 | R_0603_1608Metric | R46 |
| 1 | 200R | R_0603_1608Metric | R55 |
| 1 | 1k5 | R_0603_1608Metric | R57 |
| 1 | 3k3 | R_0603_1608Metric | R61 |
| 10 | 4.99K 1/2W | R_1210_3225Metric | R81, R112, R113, R114, R115, R116, R117, R118 +2 |
| 1 | 100k 1/10W +-1% | R_0603_1608Metric | R82 |
| 1 | 20k 1/10W +-1% | R_0603_1608Metric | R83 |
UEFI design files
The KiCad project lives in the Churrosoft/OpenEFI-PCB repository on GitHub; these links point at the commit this page was built from.
- LayoutuEFI_rev3/uEFI_rev3.kicad_pcb
- SchematicuEFI_rev3/uEFI_rev3.kicad_sch
UEFI: common questions
What microcontroller does the UEFI use?
The UEFI is built around the MCZ33810EK, from the STM32 family.
How big is the UEFI PCB?
The UEFI measures 99 × 113 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the UEFI?
228 components, from 72 distinct parts. The full bill of materials is listed on this page.
Where can I download the UEFI design files?
From the Churrosoft/OpenEFI-PCB repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the UEFI design in my own project?
Yes, under the terms of its CERN-OHL-S-2.0 license, which Churrosoft chose for the repository.
Can I test firmware for the UEFI without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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STM32ΜEFI rev2
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