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RPROM

niklasekstrom·RPROM·Hardware/Rev1/KiCad/RPROM.kicad_pcb

RPROM PCB layout, top view — open source RP2040/RP2350 board by niklasekstrom
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About the RPROM PCB

RPROM is an open source RP2040/RP2350 PCB design by niklasekstrom, published on GitHub. It is a 4-layer board measuring 18 × 51 mm, with 41 components from 19 distinct parts.

Its main chip is the RP2350_80QFN, from the RP2040/RP2350 family. Other key parts include the W25Q32RVXHJQ and TLV1117-33. By type, the board carries 21 capacitors, 7 resistors, 4 connectors, 3 ICs, 2 switches and 2 diodes.

It belongs with the retro computing designs in this gallery.

From the project

ROM emulator based on the RP2350B microcontroller

RPROM is a ROM emulator for 16 bit Amiga computers (A500, A600, A2000) based on the RP2350B microcontroller. RPROM was designed in collaboration by Niklas Ekström and Per Bengtsson.

The RPROM board has a 4 MB SPI flash memory. Each ROM image is 512 kB in size, and therefore the 4 MB is divided into eight slots of 512 kB each. The first slot is dedicated to store code and configuration data for the RP2350B. The seven remaining slots are used to store ROM images.

RPROM, from the project README
From the project README

Main components on the RPROM

W25Q32RVXHJQRP2350_80QFNTLV1117-33

RPROM bill of materials (BOM)

41 components, 19 distinct parts.

QtyPartRefs
1
W25Q32RVXHJQ
IC1
1
RP2350_80QFN
U1
1
TLV1117-33
U2
1
ABM8-272-T3
Y1
1
USB_B_Micro
J1
2
Conn_01x20
J2, J3
1
Conn_01x01
J4
2
SW_Push
SW1, SW2
2
B5819W_SL
D1, D2
1
3.3u
L1
3
10u
C1, C5, C19
12
100n
C2, C8, C11, C12, C13, C14, C15, C16 +4
2
15p
C3, C4
2
4.7u
C6, C7
2
4.7u
C9, C10
1
10k
R1
3
1k
R2, R4, R6
1
33
R3
2
27
R7, R8

RPROM design files

The KiCad project lives in the niklasekstrom/RPROM repository on GitHub; these links point at the commit this page was built from.

RPROM: common questions

What microcontroller does the RPROM use?

The RPROM is built around the RP2350_80QFN, from the RP2040/RP2350 family.

How big is the RPROM PCB?

The RPROM measures 18 × 51 mm, has 4 copper layers and is 1.6 mm thick.

How many components are on the RPROM?

41 components, from 19 distinct parts. The full bill of materials is listed on this page.

Where can I download the RPROM design files?

From the niklasekstrom/RPROM repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.

Can I use the RPROM design in my own project?

The repository has no license, so all rights stay with niklasekstrom. Use it as a reference, and ask the author before reusing the design.

Can I test firmware for the RPROM 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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