4 layers160 × 110 mm
DCJ11CoreBoard
CYP4502D6/DCJ11CoreBoard
PDP-11 replica project based on the DEC DCJ-11 chipset, utilizing FPGA as bus controller and peripheral emulator, using external SRAM to provide system memory
200 parts13GPL-3.0
6 layers180 × 120 mm
DCJ11CoreBoard v1.3
CYP4502D6/DCJ11CoreBoard13PDP-11 replica project based on the DEC DCJ-11 chipset, utilizing FPGA as bus controller and peripheral emulator, using external SRAM to provide system memory
- Size
- 180 × 120 mm
- Copper layers
- 6
- Thickness
- 1.6 mm
- Parts
- 234
- Nets
- 579
- Pads
- 1,436
- Tracks, vias
- 2,669, 827
- Pours
- 23
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 23 May 2026
- Updated
- 1 Sep 2026
Overview
DCJ11CoreBoard v1.3 is an open-source printed circuit board by CYP4502D6, from the CYP4502D6/DCJ11CoreBoard repository on GitHub, published under the GPL-3.0 licence. It is a 6-layer board of 180 × 120 mm with 234 parts on 579 nets, routed with 2,669 tracks and 827 vias.
It is built around the EP4CE15F23C8N, RP2040 and AW21024QNR, with the SD-CARD 11P, SY8089AAAC and CY62167EV30LL-45ZXI among its other parts. Its parts include 71 capacitors, 60 resistors, 55 diodes, 22 ICs and 5 switches. It belongs with the fPGA and programmable logic boards and the RP2040 and FPGA and CPLD boards of this library.
Main components
12
EP4CE15F23C8N
FBGA-484(23x23)0℃~+85℃ 1.15V~1.25V 15408 343 516096bit 963 Cyclone IV E Supports hot swap FBGA-484 Programmable Logic Device (CPLDs/FPGAs) ROHSIntel/AlteraCPLD/FPGA
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
AW21024QNR
QFN-32-EP(4x4)-40℃~+85℃ 0V~5.5V 2.7V~5.5V 20mA 24 5% Over-Temperature Protection (OTP) PWM QFN-32-EP(4x4) LED Drivers ROHSAWINICLED Drivers
SD-CARD 11P
SMD-40℃~+70℃ 2.8mm Connector and Ejector Push-Pull Standard SD Card SMD SD Card / Memory Card Connector ROHSSHOU HANSD Card / Memory Card Connector
SY8089AAAC
SOT-23-5-40℃~+85℃@(TA) 1 1MHz 2.7V~5.5V 2A 55uA Adjustable Buck Buck Built-in Yes SOT-23-5 DC-DC Converters ROHS矽力杰silergyDC-DC Converters
CY62167EV30LL-45ZXI
TSOP-48-12.2mm-40℃~+85℃ 12uA 16Mbit 2.2V~3.6V 45ns TSOP-48-12.2mm SRAM ROHSInfineon TechnologiesSRAM
CH221K
SOT-23-6-40℃~+105℃ 100W 5V、9V、12V、15V、20V PD 3.0 Power Receiver Controller SOT-23-6 USB PD ROHSWCH (Nanjing Qinheng Microelectronics)USB PD
ME6211A12M3G-N
SOT-23-40℃~+150℃ 1 1.2V 300mA 30uA 500mV@(200mA) 50uVrms 6V 70dB@(1kHz) Fixed Over Current Protection、Over Temperature Protection、Enable Positive SOT-23 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
ME6211A25M3G-N
SOT-23-3-40℃~+85℃@(Ta) 1 2.5V 30uA 400mA 50uVrms 6V 70dB@(1kHz) 80mV@(100mA) Enable Fixed Positive SOT-23-3 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMICRONEVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsTPS54302
UncategorisedTexas Instruments
XL-1608UOC-06
0603-40℃~+85℃ 120° 2.3V 20mA 315mcd 50mW 600nm~610nm 605nm Discrete Diode Orange Top-mount Water Clear 0603 LED Indication - Discrete ROHSXINGLIGHTLED Indication - DiscreteSZYY0603B1
0603LED Indication - DiscreteYongyu Photoelectric
README
pcb_v1.1_old/README.mdPDP-11 Single-Board-Computer Replication Project
Temporary specification sheet for the DEC DCJ-11 and FPGA-based PDP-11 replication hardware. Using FPGA as a bus controller and emulating peripherals such as disk drives.
Core Hardware (v1.0 - v1.1)
- CPU: DEC DCJ-11
- FPGA: Gowin GW1N-LV9LQ144
- SRAM: 2× CY62167EV30LL
- Bus voltage conversion: 5× SN74CB3T3245PWR
Hardware Revisions
v1.0 (Fabricated)
Known Issues:
- CH221K (USB PD): Missing series resistors on power lines.
- SD Slot: VCC and GND pins are inverted.
- CH347: Incompatible as a Gowin JTAG debugger.
- The absence of balanced copper on the top and bottom layers caused thermal expansion and contraction issues during SMT production.
v1.1 (Unfabricated)
- Errata from v1.0 fixed in design files. Production bypassed.
v1.2 (In Development)
- Architecture Change: Migrating to Altera Cyclone IV EP4CE15F23 and Raspberry Pi RP2040. Integrating original PDP-11 front panel status indicators.
Parts
234| Qty | Value | Footprint | References |
|---|---|---|---|
| 48 | XL-1608UOC-06 | JLCImport:XL-1608UOC-06 | LED1, LED2, LED10, LED11, LED12, LED13, LED14, LED15, LED16, LED17, LED18, LED19, LED20, LED21, LED22, LED23 +32 |
| 42 | 100nF | PCM_JLCPCB:C_0402 | C17, C18, C21, C22, C23, C24, C25, C26, C27, C31, C32, C33, C34, C35, C36, C37 +26 |
| 12 | 10kΩ | PCM_JLCPCB:R_0402 | R29, R30, R31, R32, R33, R37, R39, R40, R41, R44, R45, R54 |
| 11 | 10kΩ | PCM_JLCPCB:R_0603 | R1, R18, R19, R20, R21, R22, R23, R24, R25, R26, R27 |
| 7 | 1kΩ | PCM_JLCPCB:R_0603 | R11, R36, R58, R59, R60, R61, R62 |
| 7 | SZYY0603B1 | JLCImport:SZYY0603B1 | LED3, LED4, LED5, LED50, LED51, LED52, LED55 |
| 6 | 5.1kΩ | PCM_JLCPCB:R_0603 | R2, R3, R50, R51, R56, R57 |
| 5 | 1uF | PCM_JLCPCB:C_0603 | C1, C13, C14, C15, C16 |
| 5 | 22uF | PCM_JLCPCB:C_0805 | C5, C6, C9, C11, C12 |
| 5 | 4.7kΩ | PCM_JLCPCB:R_0603 | R10, R13, R14, R16, R17 |
| 5 | SN74CB3T3245PWR | PCM_JLCPCB:TSSOP-20_4.4x6.5mm_P0.65mm | U8, U9, U11, U12, U13 |
| 5 | Tactile Button, 160gf | PCM_JLCPCB:SW_TS-1088-AR02016 | S1, S2, S6, S7, S8 |
| 4 | 10uF | PCM_JLCPCB:C_0402 | C63, C64, C69, C70 |
| 4 | 1kΩ | PCM_JLCPCB:R_0402 | R28, R34, R35, R55 |
| 4 | MountingHole_Pad | MountingHole:MountingHole_3.2mm_M3_ISO14580_Pad | H2, H3, H4, H5 |
| 3 | 0603WAF220JT5E | PCM_JLCPCB:R_0603 | R9, R15, R38 |
| 3 | 4.7uF | PCM_JLCPCB:C_0805 | C49, C50, C59 |
| 3 | 47kΩ | PCM_JLCPCB:R_0402 | R4, R52, R53 |
| 3 | TYPE-C_16PIN_2MD_073 | JLCImport:TYPE-C_16PIN_2MD_073 | USB1, USB2, USB3 |
| 2 | 100kΩ | PCM_JLCPCB:R_0603 | R5, R7 |
| 2 | 15pF | PCM_JLCPCB:C_0402 | C60, C61 |
| 2 | 1kΩ | PCM_JLCPCB:R_0603x4 | R42, R43 |
| 2 | 4.7kΩ | PCM_JLCPCB:R_0402 | R46, R47 |
| 2 | 68pF | PCM_JLCPCB:C_0603 | C19, C20 |
| 2 | AW21024QNR | JLCImport:AW21024QNR | U18, U19 |
| 2 | BSS138W | PCM_JLCPCB:Q_SOT-323 | Q1, Q3 |
| 2 | CY62167EV30LL-45ZXI | Package_SO:TSOP-I-48_18.4x12mm_P0.5mm | U3, U4 |
| 2 | Header-Female-2_54_1x6 | JLCImport:Header-Female-2_54_1x6 | P1, P2 |
| 2 | PZ254V-11-08P | JLCImport:PZ254V-11-08P | H1, H6 |
| 2 | TAJA334K035RNJ | JLCImport:TAJA334K035RNJ | C28, C29 |
| 2 | W25Q64JVSSIQ_C179171 | Package_SO:SOIC-8_5.3x5.3mm_P1.27mm | U17, U21 |
| 1 | 0603WAF1332T5E | PCM_JLCPCB:R_0603 | R6 |
| 1 | 0603WAF2212T5E | PCM_JLCPCB:R_0603 | R8 |
| 1 | 100nF | PCM_JLCPCB:C_0805 | C7 |
| 1 | 100nF | PCM_JLCPCB:C_0603 | C3 |
| 1 | 10uF | PCM_JLCPCB:C_0603 | C2 |
| 1 | 1MΩ | PCM_JLCPCB:R_0603 | R12 |
| 1 | 22pF | PCM_JLCPCB:C_0603 | C10 |
| 1 | 9BC18000151060C3 | JLCImport:9BC18000151060C3 | X1 |
| 1 | ABM8-272-T3_C20625731 | JLCImport:ABM8-272-T3_C20625731 | U22 |
| 1 | BLM18AG601SN1D | JLCImport:BLM18AG601SN1D | L3 |
| 1 | BSS84 | Package_TO_SOT_SMD:SOT-23 | Q2 |
| 1 | CC0603JRNPO9BN750 | PCM_JLCPCB:C_0603 | C8 |
| 1 | CH221K | Package_TO_SOT_SMD:SOT-23-6 | U6 |
| 1 | CH340N_C2977777 | JLCImport:CH340N_C2977777 | U5 |
| 1 | DCJ11 | JLCImport:DIP-60_W33.02mm_LongPads | U1 |
| 1 | EP4CE15F23C8N | JLCImport:EP4CE15F23C8N | U2 |
| 1 | FXL0420-2R2-M | JLCImport:FXL0420-2R2-M | L2 |
| 1 | LOGO | JLCImport:dec_logo | G*** |
| 1 | LOGO | JLCImport:pdp11_logo | G*** |
| 1 | MA35V47M6X6 | JLCImport:MA35V47M6X6 | C30 |
| 1 | ME6211A12M3G-N | Package_TO_SOT_SMD:SOT-23-3 | U14 |
| 1 | ME6211A25M3G-N | Package_TO_SOT_SMD:SOT-23-3 | U15 |
| 1 | OT2EL4C4JI-111OLP-50M | JLCImport:OT2EL4C4JI-111OLP-50M | OSC1 |
| 1 | RP2040 | Package_DFN_QFN:QFN-56-1EP_7x7mm_P0.4mm_EP3.2x3.2mm | U20 |
| 1 | SD-CARD_11P | JLCImport:SD-CARD_11P | U16 |
| 1 | SY8089AAAC | Package_TO_SOT_SMD:SOT-23-5 | U10 |
| 1 | TPS54302 | Package_TO_SOT_SMD:SOT-23-6 | U7 |
| 1 | YSPI0630A-100M | JLCImport:YSPI0630A-100M | L1 |
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Questions
How big is the DCJ11CoreBoard v1.3 PCB?
It measures 180 × 120 mm and has 6 copper layers, 1.6 mm thick.
What parts does the DCJ11CoreBoard v1.3 use?
234 parts, built around the EP4CE15F23C8N, RP2040, AW21024QNR and SD-CARD 11P. 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 DCJ11CoreBoard v1.3 KiCad files?
From the CYP4502D6/DCJ11CoreBoard repository on GitHub, at the commit this page was made from: the board is DCJ11CoreBoard_v1.3.kicad_pcb and its schematic DCJ11CoreBoard_v1.3.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the DCJ11CoreBoard v1.3 design in my own project?
Its repository publishes it under the GPL-3.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).