2 layers73.4 × 92.5 mm Caravel Nucleo v2-M.2, the printed circuit board in 3D

Caravel Nucleo v2-M.2

This repo provides firmware examples, flash programming and diagnostic tools for testing Open MPW and chipIgnite projects using Caravel.

Full screen GitHub .kicad_pcb

Size: 73.4 × 92.5 mm
Copper layers: 2
Thickness: 1.6 mm
Parts: 92
Nets: 205
Pads: 548
Tracks, vias: 1,180, 157
Pours: 1
Routed: Yes
KiCad: KiCad 7 (file 20221018)
Created: 15 Sep 2021
Updated: 14 Nov 2024

Overview

Caravel Nucleo v2-M.2 is an open-source printed circuit board by efabless, from the efabless/caravel_board repository on GitHub. It is a 2-layer board of 73.4 × 92.5 mm with 92 parts on 205 nets, routed with 1,180 tracks and 157 vias.

It is built around the SN74LVC1G125DCKR-GK, W25Q32FVSSIG and FT232H, with the MIC2211-AAYML-TR and CSTNE12M0GH5L000R0 among its other parts. Its parts include 33 resistors, 24 capacitors, 12 ICs, 12 connectors and 4 diodes. It belongs with the computers and single-board computers boards of this library.

Main components

README

README.md

Caravel Board

This repo provides firmware examples, flash programming and diagnostic tools for testing Open MPW and chipIgnite projects using Caravel. It also provides schematics, layout and gerber files for PCB evaluation and breakout boards.

MPW-2 & MPW-3 Project Owners

See the README for the the Nucleo automated test setup here

chipIgnite Projects (including Stanford)

See the README for testing projects here -- https://github.com/efabless/caravel_board/tree/main/firmware/chipignite#readme

Firmware

You will need python 3.6 or later.

To program Caravel, connect the evaluation board using a USB micro B connector.

bash

pip3 install pyftdi

cd firmware/blink

make clean flash

Install Toolchain for Compiling Code

For Mac

https://github.com/riscv/homebrew-riscv

For Linux

https://github.com/riscv/riscv-gnu-toolchain

Diagnostics

Makefiles in the firmware project directories use

firmware/chipignite/util/caravel_hkflash.py

to program the flash on the board through Caravel's housekeeping SPI interface.

firmware/chipignite/util/caravel_hkdebug.py

provides menu-driven debug through the housekeeping SPI interface for Caravel.

Hardware

The current evaluation board for Caravel can be found here

The clock is driven by X1 with a frequency of 10MHz. To drive the clock with custom frequency, disable X1 through J6 and use the external pin for xclk
The voltage regulator U5 and U6 supply 1.8V and 3.3V through J8 and J9. The traces have to be cut if they are supplied externally.
vccd1 is connected to 1.8V through J3. The trace has to be cut if it is supplied externally
vddio is connected to 3.3V through J5. The trace has to be cut if it is supplied externally

The most updated breakout board for Caravel can be found here

Category and platform

Computers and single-board computers

Project files

Show this board on your page

https://pcbkit.io/boards/efabless/caravel_board

The board's own page, for a message or a post.

Source

Repository: efabless/caravel_board
Board file: hardware/nucleo/caravel-Nucleo-v2-M.2/caravel-Nucleo-v2-M.2.kicad_pcb
Commit: 2812cfd
Licence: Not stated
Copies: 2 copies in 4 repositories

Parts

Qty	Value	Footprint	References
10	0.1uf - CC0805KRX7R9BB104	Capacitor_SMD:C_0805_2012Metric	C2, C3, C4, C5, C6, C7, C8, C9, C16, C17
8	10k	Resistor_SMD:R_0805_2012Metric	R5, R6, R15, R16, R17, R18, R27, R28
7	10k - RC0805FR-0710KL	Resistor_SMD:R_0805_2012Metric	R1, R7, R8, R9, R10, R11, R12
6	1uf - CC0805KKX5R8BB105	Capacitor_SMD:C_0805_2012Metric	C10, C13, C18, C20, C21, C22
5	0	Resistor_SMD:R_0805_2012Metric	R29, R30, R31, R32, R33
4	0.01uf - CC0805KRX7R9BB103	Capacitor_SMD:C_0805_2012Metric	C11, C14, C19, C23
4	Conn_01x02_Male	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J3, J5, J6, J12
4	LED - 17-215SURC/S530-A2/TR8	LED_SMD:LED_1206_3216Metric	D1, D2, D3, D4
3	10uf - CC0805KKX5R8BB106	Capacitor_SMD:C_0805_2012Metric	C12, C15, C24
3	TAR5SxxU_SOT353F	Caravel_Board:SOT-353F	U5, U6, U11
2	150 - 0805W8J0151T5E	Resistor_SMD:R_0805_2012Metric	R3, R4
2	4.7K 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R25, R26
2	4.99K 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R20, R23
2	82 - 0805W8F820JT5E	Resistor_SMD:R_0805_2012Metric	R13, R14
2	Conn_01x03	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J8, J9
2	SN74LVC1G125DCKR	strive_foot_prints:SOT65P210X110-5N	U2, U3
1	0.01uf - CC0805JRX7R9BB103	Capacitor_SMD:C_0805_2012Metric	C1
1	12K 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R2
1	360 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R19
1	4.02K 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R24
1	4.22K 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R22
1	499 1% - 0805W8F1202T5E	Resistor_SMD:R_0805_2012Metric	R21
1	CSTNE12M0GH5L000R0	strive_foot_prints:CSTNE12M0GH5L000R0	Y1
1	Conn_01x02	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J11
1	Conn_01x02_Female	Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical	J2
1	Conn_01x03_Female	Connector_PinHeader_2.54mm:PinHeader_1x03_P2.54mm_Vertical	J4
1	Conn_01x06_Female	Connector_PinHeader_2.54mm:PinHeader_1x06_P2.54mm_Vertical	J7
1	Conn_01x11_Female	Connector_PinHeader_2.54mm:PinHeader_1x11_P2.54mm_Vertical	J10
1	DSC6001_10MHZ	strive_foot_prints:DSC6001JE1A-010.0000	X1
1	FT232H	Package_DFN_QFN:QFN-48-1EP_8x8mm_P0.5mm_EP6.2x6.2mm	U1
1	Logo	Caravel_Board:logo	T1
1	Logo	Caravel_Board:ef_logo	T2
1	MCP1319MT-29LE-OT	Caravel_Board:PoR_5_SOT23	U4
1	MCP4661	Caravel_Board:QFN-16-1EP_4x4mm_P0.65mm_EP2.5x2.5mm	U10
1	MIC2211-AAYML-TR	Caravel_Board:10-pin_MLF_P0.5	U9
1	MICROMOD-Standoff	MicroMod-Sparkfun:MicroMod-Standoff	H1
1	NUCLEO144-F746ZG	Caravel_Board:ST_Morpho_Connectors_144	U12
1	SW_Push - SKQGADE010	strive_foot_prints:SW4-SMD-5.2X5.2X1.5MM	SW1
1	TestPoint	TestPoint:TestPoint_Bridge_Pitch2.54mm_Drill1.0mm	TP1
1	USB_B_Micro - 10118193-0001LF	strive_foot_prints:FCI_10118193-0001LF	J1
1	W25Q32FVSS	strive_foot_prints:SOIC127P790X216-8N	U7
1	caravel-M.2-card	MicroMod-Sparkfun:M.2-CONNECTOR-E	U8

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Questions

How big is the Caravel Nucleo v2-M.2 PCB?

It measures 73.4 × 92.5 mm and has 2 copper layers, 1.6 mm thick.

What parts does the Caravel Nucleo v2-M.2 use?

92 parts, built around the SN74LVC1G125DCKR-GK, W25Q32FVSSIG, FT232H and MIC2211-AAYML-TR. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.

Where can I download the Caravel Nucleo v2-M.2 KiCad files?

From the efabless/caravel_board repository on GitHub, at the commit this page was made from: the board is hardware/nucleo/caravel-Nucleo-v2-M.2/caravel-Nucleo-v2-M.2.kicad_pcb. PCBKit opens the board in the browser, with nothing to install.

Can I use the Caravel Nucleo v2-M.2 design in my own project?

Its repository states no licence, so its author keeps all rights: ask efabless before reusing the design.