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Neo6502 Rev B1

OLIMEX·Neo6502·HARDWARE/Neo6502-rev-B1/Neo6502_Rev_B1.kicad_pcb

Neo6502 Rev B1 PCB layout, top view — open source RP2040/RP2350 board by OLIMEX
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About the Neo6502 Rev B1 PCB

Neo6502 Rev B1 is an open source RP2040/RP2350 PCB design by OLIMEX, published on GitHub. It is a 2-layer board measuring 80 × 55 mm, with 98 components from 40 distinct parts.

Its main chip is the RP2040(QFN-56_7x7mm_P0.4mm), from the RP2040/RP2350 family. Other key parts include the ZD25Q16BTIGT(SOIC-8_208mils), SY8089AAAC(SOT23-5), W65C02S6TQTG-14(TQFP44) and 74LVC245APW(TSSOP20). By type, the board carries 34 resistors, 30 capacitors, 7 ICs, 2 transistors, 1 LED and 1 diode.

It belongs with the retro computing designs in this gallery.

From the project

Neo6502 Modern Retro Computer with W65C02S processor and RP2040 memory and peripherals emulator

Contains hardware design files for Olimex Neo6502

Board was designed with free Open Source CAD software - KiCAD, if you have trouble opening the design files use newest KiCAD version.

Folder "3D printed Case" contains STL files for multi material 3D printing of the encolosure.

revision B1 ====== 1. Added diode 1N5819/S4 on FUSE1 pads to enable 5V on HDMI (diode is used to prevent HDMI powering the board). You can try this adjustmest if you have older revision (with nothing placed over FUSE1) and problems with monitor, remember diode has direction and cathode has to be towards the HDMI…

Main components on the Neo6502 Rev B1

ZD25Q16BTIGT(SOIC-8_208mils)RP2040(QFN-56_7x7mm_P0.4mm)SY8089AAAC(SOT23-5)W65C02S6TQTG-14(TQFP44)74LVC245APW(TSSOP20)

Neo6502 Rev B1 bill of materials (BOM)

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

QtyPartRefs
1
ZD25Q16BTIGT(SOIC-8_208mils)
U1
1
RP2040(QFN-56_7x7mm_P0.4mm)
U2
1
SY8089AAAC(SOT23-5)
U3
1
W65C02S6TQTG-14(TQFP44)
U4
3
74LVC245APW(TSSOP20)
U5, U6, U7
1
Q12MHz/20pF/10ppm/4P/3.2x2.5mm
Q1
1
BC817-40(SOT23)
Q2
1
PJ-3.5-365-5P
AUDIO1
1
YTS-A016-X
BOOT1
1
P-B-V-40-LF
BUS1
1
HDMI-SWM-19
DVI1
1
1N5819S4(SOD-123)
FUSE1
4
TESTPAD
HCEC1, HHPD1, HSCL1, HSDA1
4
Mounting_Hole_NPTH
MH1, MH2, MH3, MH4
1
LOGO
NEO6502_NEW
2
RA1206_(4x0603)_4B8_330R
RM1, RM2
1
Speaker_QMB-09B-03(1.5-5.0V_2.7kHz_F9.0mm*H5.5mm)
SPK1
1
NA(HN1x3)
SWD1
1
DSHP04TS-S
SWITCH1
1
P-B-V-10-LF
UEXT1
Show 20 more
QtyPartRefs
1
USB-A-SMT-6.3H
USB-HOST1
1
USB-C-16P-F(A40-00119-A52-12)
USB-PWR1
1
LED/RED/0603
PWR_LED1
1
1N4148W/SOD123
D1
1
2.2uH/1.5A/DCR=58mR/20%/3.00x3.00x1.50mm/CD32(NRS3015T2R2MNGH)
L1
18
100nF/10V/20%/X5R/C0402
C1, C2, C3, C4, C5, C6, C7, C8 +10
5
2.2uF/6.3V/20%/X5R/C0402
C11, C12, C25, C28, C30
2
18pF/50V/5%/C0G/C0402
C15, C16
5
22uF/6.3V/20%/X5R/C0603
C17, C19, C20, C23, C24
10
10k/R0402
R1, R14, R17, R18, R19, R20, R21, R30 +2
1
NA(10k/R0402)
R2
2
100R/R0402
R3, R6
2
27R/R0402
R4, R5
1
47R/R1206
R7
4
2.2k/R0402
R8, R13, R33, R34
1
150R/R0402
R9
2
5.1k/1%/R0402
R10, R12
9
270R/R0402
R11, R22, R23, R24, R25, R26, R27, R28 +1
1
220k/R0402
R15
1
49.9k/1%/R0402
R16

Neo6502 Rev B1 design files

The KiCad project lives in the OLIMEX/Neo6502 repository on GitHub; these links point at the commit this page was built from.

Neo6502 Rev B1: common questions

What microcontroller does the Neo6502 Rev B1 use?

The Neo6502 Rev B1 is built around the RP2040(QFN-56_7x7mm_P0.4mm), from the RP2040/RP2350 family.

How big is the Neo6502 Rev B1 PCB?

The Neo6502 Rev B1 measures 80 × 55 mm, has 2 copper layers and is 1.6 mm thick.

How many components are on the Neo6502 Rev B1?

98 components, from 40 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 Neo6502 Rev B1 design files?

From the OLIMEX/Neo6502 repository on GitHub, which has the KiCad layout and the BOM; the links under Design files point to each one.

Can I use the Neo6502 Rev B1 design in my own project?

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

Can I test firmware for the Neo6502 Rev B1 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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