HardLabs

Motherboard

mikegoelzer·Homebrew-ECP5-SBC·hardware/motherboard/motherboard.kicad_pcb

Motherboard PCB layout, top view — open source Raspberry Pi board by mikegoelzer
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About the Motherboard PCB

Motherboard is an open source Raspberry Pi PCB design by mikegoelzer, published on GitHub under the Custom license license. It is a 4-layer board measuring 152.4 × 76.2 mm, with 151 components from 61 distinct parts.

Its main chip is the DF40C-100DS-0.4V(51), from the Raspberry Pi family. Other key parts include the FT4232HL-REEL, 93LC56BT-I/OT, W25Q128JVSIQ, TFP410PAP and SN74LVC245APW. By type, the board carries 69 resistors, 37 capacitors, 13 ICs, 10 diodes, 9 connectors and 6 inductors.

From the project

Kicad files for homebrew hobbyist computer with custom RISC-V CPU

This is the motherboard of the computer. The Compute Module snaps into it to provide the computer's CPU and memory. The motherboard then provides:

- HDMI - VGA - JTAG - USB debug interface - PMOD connectors - Expansion slots for custom PCBs - FFC connector to connect to the hat board that provides the touch screen - SD card slot for the computer's "hard drive" - Boot flash for the FPGA - 5V power input - Diagnostic LEDs and switches - 100-pin Hirose female connectors for the Compute Module to snap into

Main components on the Motherboard

FT4232HL-REEL93LC56BT-I/OTDF40C-100DS-0.4V(51)W25Q128JVSIQTFP410PAPSN74LVC245APWADM811MARTZ-REEL7TMUX1574PWRPCA9306D,118TPS2041BDBVRTPD4E02B04DQAR

Motherboard bill of materials (BOM)

151 components, 61 distinct parts — part numbers from the project's BOM.

QtyPartRefs
1
FT4232HL-REEL
FT4232HL
Texas Instruments
U1
1
93LC56BT-I/OT
U2
1
DF40C-100DS-0.4V(51)
~
Texas Instruments
U3
1
W25Q128JVSIQ
U4
1
TFP410PAP
Texas Instruments
U5
1
SN74LVC245APW
U6
1
ADM811MARTZ-REEL7
SN74LVC245APW
Analog Devices
U7
2
TMUX1574PWR
Micron Technology Inc.
U8, U10
1
PCA9306D,118
PCA9306D
Lattice Semiconductor Corporation
U9
1
TPS2041BDBVR
TPS2041B
Winbond Electronics
U11
2
TPD4E02B04DQAR
TPD4E02B04DQA
U12, U13
1
ASEM1-12.000MHZ-LC-T
Diodes Incorporated
Y1
1
USB4105-GF-A-120
USB4105GFA120
Hirose Electric Co Ltd
J1
1
RS2-08-G
Conn_02x04_Odd_Even
Hirose Electric Co Ltd
J2
1
FH12-32S-0.5SVA(54)
FH12-32S-0.5SVA
J3
1
2086581001
HDMI_A
J4
1
ICD15S13E4GX00LF
J5
1
PH1RB-06-UA
~
J6
1
PH2RA-12-UA
~
J7
1
PH2-06-UA
Conn_02x03
J8
Show 41 more
QtyPartRefs
1
PH1-03-UA
Conn_01x03
J9
4
PTS645SL50SMTR92LFS
S1, S2, S3, S4
1
Expansion Module (30 IOs)
XM1
1
Expansion Module (14 IOs)
XM2
1
USBLC6-2SC6
Wurth
D1
2
150080VS75000
Green
Wurth
D2, D8
1
150080YS75000
Yellow
Wurth
D3
1
150080SS75000
Red
Wurth
D4
1
150080BS75000
Blue
Wurth
D5
1
150080AS75000
Amber
Wurth
D6
1
QBLP631-IW
White
D7
1
150080YS75000
Yellow/PROG
D9
1
150080VS75000
Green/RUN
D10
1
BLM31SN500SZ1L
50Ω@100mhz 12A
FB1
2
BLM21AG601SN1D
600/0.6A
FB2, FB3
3
BLM18RK601SN1D
600Ω
FB4, FB5, FB6
2
C2012X5R1V226M125AC
22uF
Murata
C1, C2
2
CC0805KRX7R9BB102
1nF
Murata Electronics
C3, C5
2
CC0805KRX7R9BB104
100nF
TDK Corporation
C4, C6
1
CL21B102KECSFNC
1nF 250V
Murata Electronics
C7
11
CC0805KRX7R9BB104
0.1uF
Murata Electronics
C8, C10, C14, C16, C18, C19, C20, C21 +3
1
CC0805KRX7R9BB101
100pF
Murata
C9
1
CC0805KKX7R8BB474
470nF
Murata
C11
2
CC0805KKX5R8BB475
4.7uF
YAGEO
C12, C13
1
GCM188R72A223KA37J
0.1uF
Murata Electronics
C15
6
CC0805KKX5R8BB106
10uF
Murata Electronics
C17, C25, C26, C31, C32, C33
8
CC0805KRX7R9BB103
10nF
Murata Electronics
C34, C35, C36, C37, C38, C39, C40, C41
14
RC0805FR-07100KL
100k
R1, R2, R3, R4, R5, R6, R7, R8 +6
18
RC0805FR-07536RL
536
YAGEO
R15, R16, R17, R18, R20, R21, R22, R23 +10
10
RC0805FR-07270RL
270
YAGEO
R19, R32, R33, R35, R36, R37, R38, R39 +2
2
RC0805FR-07100RL
100
YAGEO
R30, R31
1
RC0805FR-071ML
1M
R41
2
RC0805FR-071KL
1k
R43, R60
5
RC0805FR-072K2L
2.2k
R45, R47, R48, R49, R68
1
RC0805FR-07200KL
200k
R46
1
RC0805FR-0768R1L
61.1k
R52
4
RC0805FR-073K3L
3.3k
R53, R54, R58, R59
1
RC0805FR-07510RL
510
R55
4
RC0805FR-071KL
1k
R56, R57, R63, R64
5
RC0805FR-0710KL
10K
R61, R62, R66, R67, R69
1
RC0805FR-0712KL
12k
R65

Motherboard design files

The KiCad project lives in the mikegoelzer/Homebrew-ECP5-SBC repository on GitHub; these links point at the commit this page was built from.

Motherboard: common questions

What microcontroller does the Motherboard use?

The Motherboard is built around the DF40C-100DS-0.4V(51), from the Raspberry Pi family.

How big is the Motherboard PCB?

The Motherboard measures 152.4 × 76.2 mm, has 4 copper layers and is 1.566672 mm thick.

How many components are on the Motherboard?

151 components, from 61 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 Motherboard design files?

From the mikegoelzer/Homebrew-ECP5-SBC 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 Motherboard design in my own project?

It is published under Custom license, which limits how it may be reused; read the license before building on it.

Can I test firmware for the Motherboard without the hardware?

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

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