Firmware edition
About the Firmware edition PCB
Firmware edition is an open source STM32 PCB design by coffee-and-telesense, published on GitHub. It is a 2-layer board measuring 70.4 × 69.5 mm, with 98 components from 67 distinct parts.
Its main chip is the STM32U073KCU6, from the STM32 family. Other key parts include the ADP5091, TPS61023DRLR, MAX-M10M-00B, Si4463 and TXS0102VDCTR. By type, the board carries 27 capacitors, 22 resistors, 17 connectors, 6 ICs, 3 transistors and 3 inductors.
Main components on the Firmware edition
Firmware edition bill of materials (BOM)
98 components, 67 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | ADP5091 | LFCSP-24-1EP_4x4mm_P0.5mm_EP2.3x2.3mm | U1 |
| 1 | TPS61023DRLR | DRL0006A | U2 |
| 1 | MAX-M10M-00B | MOD18_MAX-M10M_UBL | U3 |
| 1 | Si4463 | QFN-20-1EP_4x4mm_P0.5mm_EP2.6x2.6mm | U4 |
| 1 | STM32U073KCU6 | UFQFPN-32_STM | U5 |
| 1 | TXS0102VDCTR | SSOP8_DCT_TEX | U6 |
| 3 | BSS84 | SOT-23 | Q1, Q2, Q3 |
| 1 | 30MHz | Crystal_SMD_Abracon_ABM3-2Pin_5.0x3.2mm | Y1 |
| 1 | Solar Panel | PinSocket_1x02_P2.54mm_Vertical | J1 |
| 1 | BATT | PinSocket_1x02_P2.54mm_Vertical | J2 |
| 1 | 3V3 Sensor Bus | PinSocket_1x02_P2.54mm_Vertical | J3 |
| 1 | Conn_01x04 | PinHeader_1x04_P2.54mm_Vertical | J4 |
| 1 | Conn_01x02 | PinHeader_1x02_P2.54mm_Vertical | J6 |
| 4 | GPIO | PinHeader_1x02_P2.54mm_Vertical | J8, J10, J12, J21 |
| 1 | I2C-3V3 | PinHeader_1x02_P2.54mm_Vertical | J11 |
| 1 | SPI | PinHeader_1x04_P2.54mm_Vertical | J13 |
| 1 | I2C-5V | PinHeader_1x02_P2.54mm_Vertical | J14 |
| 1 | SWD | PinHeader_1x02_P2.54mm_Vertical | J15 |
| 1 | USB_C | PinHeader_1x03_P2.54mm_Vertical | J16 |
| 2 | Conn_01x01_Pin | PinHeader_1x01_P2.54mm_Vertical | J19, J20 |
Show 47 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | 3V3 | PinSocket_1x02_P2.54mm_Vertical | J22 |
| 1 | Antenna | AC30157-01 GNSS Ceramic Chip | AE1 |
| 1 | Antenna | SolderWirePad_1x01_SMD_1x2mm | AE2 |
| 1 | 10n | C_0603_1608Metric | CC1 |
| 1 | 30p | C_0603_1608Metric | CF1 |
| 2 | 20p | C_0603_1608Metric | CF2, CF3 |
| 1 | 13p | C_0603_1608Metric | CR1 |
| 1 | 6.8p | C_0603_1608Metric | CR2 |
| 1 | 39n | L_0603_1608Metric | LF1 |
| 2 | 47n | L_0603_1608Metric | LF2, LF4 |
| 1 | 68n | L_0603_1608Metric | LF3 |
| 1 | 300n | L_0603_1608Metric | LR1 |
| 1 | 150n | L_0603_1608Metric | LR2 |
| 1 | 390n | L_0603_1608Metric | Lchk1 |
| 1 | 50 | R_0603_1608Metric | RF1 |
| 1 | BOOT_DFU | SW_Push_1TS009xxxx-xxxx-xxxx_6x6x5mm | SW1 |
| 1 | RST | SW_Push_1TS009xxxx-xxxx-xxxx_6x6x5mm | SW2 |
| 1 | 3.3V | D_0402_1005Metric_Pad0.77x0.64mm_HandSolder | D1 |
| 1 | 22u | L_Vishay_IFSC-1515AH_4x4x1.8mm | L1 |
| 1 | 1u | L_0603_1608Metric | L2 |
| 1 | 2.0n | L_0603_1608Metric | L3 |
| 2 | 10n | C_0603_1608Metric | C1, C11 |
| 4 | 10u | C_0603_1608Metric | C2, C5, C6, C7 |
| 3 | 0.1u | C_0603_1608Metric | C3, C26, C27 |
| 1 | 4.7u | C_0603_1608Metric | C4 |
| 2 | DNP | C_0603_1608Metric | C8, C9 |
| 1 | 1u | C_0603_1608Metric | C10 |
| 1 | 2.2u | C_0603_1608Metric | C12 |
| 9 | 100n | C_0603_1608Metric | C13, C14, C17, C18, C19, C20, C21, C22 +1 |
| 2 | 470p | C_0603_1608Metric | C15, C25 |
| 1 | 100p | C_0603_1608Metric | C16 |
| 1 | 10p | C_0603_1608Metric | C24 |
| 1 | 55.6k | R_0603_1608Metric | R1 |
| 1 | 150k | R_0603_1608Metric | R2 |
| 3 | 7.5M | R_0603_1608Metric | R3, R6, R7 |
| 1 | 115k | R_0603_1608Metric | R4 |
| 1 | 3.3M | R_0603_1608Metric | R5 |
| 2 | 5.1M | R_0603_1608Metric | R8, R10 |
| 1 | 20M | R_0603_1608Metric | R9 |
| 3 | 10M | R_0603_1608Metric | R11, R13, R14 |
| 1 | 4.7M | R_0603_1608Metric | R12 |
| 1 | 1.47M | R_0603_1608Metric | R15 |
| 1 | 200k | R_0603_1608Metric | R16 |
| 1 | 1M | R_0603_1608Metric | R17 |
| 1 | 100k | R_0603_1608Metric | R20 |
| 2 | 10k | R_0603_1608Metric | R21, R22 |
| 2 | 0 | R_0603_1608Metric | R25, R26 |
Firmware edition design files
The KiCad project lives in the coffee-and-telesense/PicoAPRS repository on GitHub; these links point at the commit this page was built from.
Firmware edition: common questions
What microcontroller does the Firmware edition use?
The Firmware edition is built around the STM32U073KCU6, from the STM32 family.
How big is the Firmware edition PCB?
The Firmware edition measures 70.4 × 69.5 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Firmware edition?
98 components, from 67 distinct parts. The full bill of materials is listed on this page.
Where can I download the Firmware edition design files?
From the coffee-and-telesense/PicoAPRS repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the Firmware edition design in my own project?
The repository has no license, so all rights stay with coffee-and-telesense. Use it as a reference, and ask the author before reusing the design.
Can I test firmware for the Firmware edition 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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