

Prototype1
Recreation of the Atari POKEY chip (work in progress)
- Size
- 111.8 × 80.8 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 164
- Nets
- 116
- Pads
- 453
- Tracks, vias
- 1,083, 285
- Pours
- 2
- Routed
- Yes
- KiCad
- KiCad 7 (file 20221018)
- Created
- 23 Dec 2022
- Updated
- 10 Dec 2024
Overview
Prototype1 is an open-source printed circuit board by nmikstas, from the nmikstas/atari_pokey repository on GitHub. It is a 4-layer board of 111.8 × 80.8 mm with 164 parts on 116 nets, routed with 1,083 tracks and 285 vias.
It is built around the CMOD A7-35T, FXMAR2104UMX and 74LVC3G14DC, with the LD1117S33TR(MS) and 2N7002NXAKR among its other parts. Its parts include 24 capacitors, 18 transistors, 13 ICs, 7 resistors and 4 connectors.
Main components
5CMOD A7-35T
Breadboardable Artix-7 FPGA ModuleDigilentUncategorisedFXMAR2104UMX
UFQFN-12(1.8x1.8)-40℃~+85℃ 1 1.65V~5.5V 1.65V~5.5V 26Mbps 4 6mA Automatic direction detection、Power-off protection、Output enable high-impedance、Integrated pull-up resistor Bidirectional I2C Level translator Tri-State、Open-drain UFQFN-12(1.8x1.8) Translators, Level Shifters ROHSonsemiTranslators, Level Shifters74LVC3G14DC
VSSOP-8-0.5mm-40℃~+125℃ 1.65V~5.5V 2.4ns@5.5V,50pF 24mA 24mA 3 4uA 74LVC Schmitt trigger VSSOP-8-0.5mm Inverters ROHSNexperiaInvertersLD1117S33TR(MS)
SOT-223-20℃~+125℃@(Ta) 1 1.4V@(1A) 12V 1A 2mA 3.3V Fixed Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMSKSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators2N7002NXAKR
SOT-23-55℃~+150℃ 1 N-channel 190mA、300mA 2.1V 20pF 265mW、1.33W 4.5Ω@10V 430pC@4.5V 60V SOT-23 MOSFETs ROHSNexperiaMOSFETs
README
README.mdatari_pokey
Recreation of the Atari POKEY chip (work in progress)
Parts
164| Qty | Value | Footprint | References |
|---|---|---|---|
| 98 | ~ | POKEY_Footprints:TP | TP1, TP2, TP10, TP11, TP12, TP13, TP14, TP15, TP16, TP17, TP18, TP19, TP20, TP21, TP22, TP23 +82 |
| 23 | .1uf | Capacitor_SMD:C_0402_1005Metric | C1, C2, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23 +7 |
| 18 | 2N7002NXAK | Package_TO_SOT_SMD:SOT-23-3 | Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q10, Q11, Q12, Q13, Q14, Q15, Q16, Q17, Q18 +2 |
| 9 | FXMAR2104UMX | POKEY_Footprints:ULTRATHIN_MLP_12L_ONS-L | U1, U2, U3, U4, U5, U6, U8, U10, U12 |
| 3 | 74LVC3G14 | POKEY_Footprints:YZP8 | U7, U9, U11 |
| 1 | 1.65K 1% | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | 10uf | Capacitor_SMD:C_0805_2012Metric | C24 |
| 1 | 1k | Resistor_SMD:R_0402_1005Metric | R7 |
| 1 | 24K 1% | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | 2x20_Conn | POKEY_Footprints:Con_2X20 | J4 |
| 1 | 3.3K 1% | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | 7.68K 1% | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | 75K 1% | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | 825 1% | Resistor_SMD:R_0402_1005Metric | R6 |
| 1 | CMOD-A7 | POKEY_Footprints:Con_2X24 | J2 |
| 1 | Conn_01x03_Pin | Connector_PinSocket_2.54mm:PinSocket_1x03_P2.54mm_Vertical | J1 |
| 1 | LD1117S33TR | POKEY_Footprints:Reg | U13 |
| 1 | PMOD | POKEY_Footprints:PMOD | J3 |
Questions
How big is the Prototype1 PCB?
It measures 111.8 × 80.8 mm and has 4 copper layers, 1.6 mm thick.
What parts does the Prototype1 use?
164 parts, built around the CMOD A7-35T, FXMAR2104UMX, 74LVC3G14DC and LD1117S33TR(MS). 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 Prototype1 KiCad files?
From the nmikstas/atari_pokey repository on GitHub, at the commit this page was made from: the board is PCB/Prototype1/Prototype1.kicad_pcb and its schematic PCB/Extender_Board/Extender_Board/Extender_Board.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Prototype1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask nmikstas before reusing the design.
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