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Dspod cv1800b

emeb·dspod·dspod_cv1800b/Hardware/dspod_cv1800b.kicad_pcb

Dspod cv1800b PCB layout, top view — open source RISC-V board by emeb

About the Dspod cv1800b PCB

Dspod cv1800b is an open source RISC-V PCB design by emeb, published on GitHub under the MIT license. It is a 4-layer board measuring 26.4 × 41.7 mm, with 93 components from 32 distinct parts.

Its main chip is the CV1800b, from the RISC-V family. Other key parts include the TPS62A02, XC6222B331MR-G, CD4051B and NAU88C22. By type, the board carries 45 capacitors, 30 resistors, 7 ICs, 5 connectors, 3 diodes and 2 inductors.

It belongs with the audio designs in this gallery.

From the project

A family of boards for Eurorack DSP audio

The dspod_cv1800b is a daughterboard comprising a Sophgo/CVItek CV1800B Linux SoC with 64MB RAM, SD card interface, USB and GPIO + audio I/O.

This project was inspired by the release of the Milk-V Duo development board for the Sophgo/CVItek CV1800B SoC back in late 2023. The main chip is a 1GHz dual-core RISC-V system with integrated DRAM in a DIY-friendly 68-pin QFN package that would allow me to build a single-board audio DSP module at low cost without needing fancy PCB processes of complex assembly. I spent a fair amount of time exploring the hardware and OS before concluding that I would…

Dspod cv1800b, from the project README
From the project README

Main components on the Dspod cv1800b

TPS62A02XC6222B331MR-GCV1800bCD4051BNAU88C22

Dspod cv1800b bill of materials (BOM)

93 components, 32 distinct parts.

QtyPartRefs
2
TPS62A02
U1, U2
2
XC6222B331MR-G
U3, U5
1
CV1800b
U4
1
CD4051B
U6
1
NAU88C22
U7
1
ECS-250-8-36CKM-TR3 25MHz 8pf
Y1
1
Conn_01x03
J1
1
Micro_SD_Card_Det1
J2
1
USB_C_Receptacle_USB2.0
J3
2
Conn_01x16
J4, J5
2
PMEG2010ER
D1, D2
1
LED Green
D3
2
1uH
L1, L2
12
4.7uf
C1, C2, C14, C17, C31, C40, C41, C42 +4
7
1uf
C3, C11, C15, C21, C24, C36, C37
15
0.1uf
C4, C5, C6, C7, C18, C20, C22, C25 +7
2
120pf
C8, C9
3
22uf
C12, C13, C16
4
10uf
C19, C23, C38, C39
2
12pf
C28, C30
Show 12 more
QtyPartRefs
6
4k7
R1, R3, R14, R15, R26, R27
8
10k
R2, R4, R5, R6, R7, R12, R21, R22
1
200k
R8
2
100k
R9, R11
1
50k
R10
1
1k
R13
1
2k2
R16
1
2k4
R17
1
9k1
R18
3
5k1
R19, R23, R24
2
1M
R20, R25
3
0
R28, R29, R30

Dspod cv1800b design files

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

Dspod cv1800b: common questions

What microcontroller does the Dspod cv1800b use?

The Dspod cv1800b is built around the CV1800b, from the RISC-V family.

How big is the Dspod cv1800b PCB?

The Dspod cv1800b measures 26.4 × 41.7 mm, has 4 copper layers and is 1.5313 mm thick.

How many components are on the Dspod cv1800b?

93 components, from 32 distinct parts. The full bill of materials is listed on this page.

Where can I download the Dspod cv1800b design files?

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

Can I use the Dspod cv1800b design in my own project?

Yes, under the terms of its MIT license, which emeb chose for the repository.

Can I test firmware for the Dspod cv1800b without the hardware?

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

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