HardLabs

Fire-24-c

johanputzolu-cmd·Onerom·hardware/pcb/verified/fire-24-c/kicad/fire-24-c.kicad_pcb

Fire-24-c PCB layout, top view — open source RP2040/RP2350 board by johanputzolu-cmd

About the Fire-24-c PCB

Fire-24-c is an open source RP2040/RP2350 PCB design by johanputzolu-cmd, published on GitHub under the CC-BY-SA-4.0 license. It is a 2-layer board measuring 18.9 × 31.6 mm, with 40 components from 20 distinct parts.

Its main chip is the RP2354B, from the RP2040/RP2350 family. Other key parts include the 2332/2364 SOCKET, AP2112K-3.3, USBLC6-2P6 and W25Q16JVSS. By type, the board carries 18 capacitors, 8 resistors, 5 ICs, 4 connectors, 3 diodes and 1 crystal.

From the project

23xx Fire (RP2350 24 pin) combined USB+SWD One ROM PCB. Includes 2 image select jumpers. Supports PIO and CPU serving algorithms.

23xx Fire (RP2350 24 pin) combined USB+SWD One ROM PCB. Includes 2 image select jumpers. Supports PIO and CPU serving algorithms.

- Schematic - Fab Files - KiCad Design Files - Errata - Notes - Changelog

In the 2332 base, CS1 and CS2 are non-contiguous. This is a side-effect of making the 27xx OE/CE pins contiguous. There is no way to make them both contiguous, and also make the X pins contiguous with the CS pin in the 2364 case. This design makes the trade-off to keep the pins contiguous for more ROM types. The PIO algorithm also supports non-contiguous CS pins, as used for the 2332, so…

Main components on the Fire-24-c

RP2354B2332/2364 SOCKETAP2112K-3.3USBLC6-2P6W25Q16JVSS

Fire-24-c bill of materials (BOM)

40 components, 20 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
RP2354B
RP2350_60QFN
U1
1
2332/2364 SOCKET
U2
1
AP2112K-3.3
U3
1
USBLC6-2P6
U4
1
W25Q16JVSS
U5
1
CRYSTAL_GND24
Crystal_GND24
Y1
1
USB_C_RECEPTACLE_USB2.0_16P
Conn_01x02_Pin
J1
1
Conn_02x04_Odd_Even
J2
1
Conn_01x02_Pin
J3
1
USB_B_Micro
J6
1
C2286
LED_Small
D1
2
1N5819WS
D2, D3
1
3.3U
3.3u
L1
6
4.7UF
4.7uF
C1, C2, C3, C7, C13, C15
8
0.1UF
0.1uF
C4, C5, C6, C8, C9, C10, C11, C12
2
4.7UF
4.7uF
C16, C17
2
15PF
15pF
C18, C19
4
10K
R1, R3, R7, R8
3
1K
R2, R5, R6
1
33R
R4

Fire-24-c design files

The KiCad project lives in the johanputzolu-cmd/Onerom repository on GitHub; these links point at the commit this page was built from.

Fire-24-c: common questions

What microcontroller does the Fire-24-c use?

The Fire-24-c is built around the RP2354B, from the RP2040/RP2350 family.

How big is the Fire-24-c PCB?

The Fire-24-c measures 18.9 × 31.6 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Fire-24-c?

40 components, from 20 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.

Where can I download the Fire-24-c design files?

From the johanputzolu-cmd/Onerom repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.

Can I use the Fire-24-c design in my own project?

Yes, under the terms of its CC-BY-SA-4.0 license, which johanputzolu-cmd chose for the repository.

Can I test firmware for the Fire-24-c without the hardware?

Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug RP2040/RP2350 firmware against it before you order a PCB.

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