4 layers49.5 × 48.3 mm
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4 layers51.4 × 60.6 mm
Gb rp2040 cart
deltabeard/DBGC57A Game Boy cartridge using the Raspberry Pi RP2040 with RTC and MBC support.
- Size
- 51.4 × 60.6 mm
- Copper layers
- 4
- Thickness
- 1 mm
- Parts
- 67
- Nets
- 95
- Pads
- 358
- Tracks, vias
- 813, 108
- Pours
- 8
- Routed
- Yes
- KiCad
- KiCad 5 (file 20210824)
- Created
- 22 Aug 2021
- Updated
- 27 Dec 2021
Overview
Gb rp2040 cart is an open-source printed circuit board by deltabeard, from the deltabeard/DBGC repository on GitHub. It is a 4-layer board of 51.4 × 60.6 mm with 67 parts on 95 nets, routed with 813 tracks and 108 vias.
It is built around the RP2040, W25Q128JVSIQ and SN74LVC8T245PW, with the DS1302Z+, TXU0104PW and XC6206P332MR among its other parts. Its parts include 26 capacitors, 14 resistors, 9 ICs, 3 diodes and 3 transistors. It belongs with the retro computing and games boards and the RP2040 boards of this library.
Main components
8
RP2040
LQFN-56(7x7)12bit 133MHz 30 LQFN-56(7x7) Microcontrollers (MCU/MPU/SOC) ROHSRaspberry PiMicrocontrollers (MCU/MPU/SOC)
W25Q128JVSIQ
SOIC-8-208mil-40℃~+85℃ 100,000 cycles 120ms@(32KB) 128Mbit 133MHz 1uA 2.7V~3.6V 20 Years 3ms Power-on reset、Hardware write protection、Software write protection、Write enable latch、Absolute write protection SPI SOIC-8-208mil NOR FLASH ROHSWinbondNOR FLASH
SN74LVC8T245PW
TSSOP-24-40℃~+85℃ 1 1.65V~5.5V 1.65V~5.5V 8 Bidirectional CMOS CMOS Tri-State TSSOP-24 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
DS1302Z+
SOIC-8Real Time ClocksMaxim Integrated (Analog Devices)
TXU0104PW
TSSOP-14-40℃~+125℃ 1 1.08V~5.5V 1.08V~5.5V 200Mbps 4 Level translator Power-off protection、Output enable high-impedance、Integrated pull-up resistor Tri-State Unidirectional TSSOP-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
XC6206P332MR
SOT-23-40℃~+85℃@(Ta) 1 1uA 200mA 3.3V 6V Fixed Over Current Protection Positive SOT-23-3L Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTorex SemiconductorVoltage Regulators - Linear, Low Drop Out (LDO) RegulatorsSI2301CDS-T1-GE3
SOT-23-55℃~+150℃ 1 P-Channel 1.6W 10nC@4.5V 142mΩ@2.5V 1V 20V 3.1A 405pF 55pF 75pF P-Channel SOT-23 MOSFETs ROHSVishay IntertechnologyMOSFETs
SM4007PL
SOD-123FL-55℃~+150℃ 1.1V@1A 10uA@1kV 1A 1kV 25A Independent SOD-123FL Diodes - General Purpose ROHSMDDDiodes - General Purpose
README
README.mdDBGC: Deltabeard's Game Boy Cartridge
A reprogrammable Game Boy cartridge that utilises the Raspberry Pi RP2040.
Supported Features
- Support for No MBC, MBC1 and MBC3 games (but only in single-speed mode).
- Real Time Clock (RTC) with battery backup.
- FRAM 32KiB for save support.
- NOR Flash 16MiB with support upto 8MiB ROM size.
- Can only play the one game programmed in at compile time.
- USB-C firmware upgrade support.
Proposed Features
- Support multiple games on NOR Flash.
- USB-C flash storage explorer to store and retrieve save files and ROMs.
- USB-C networking support.
Flash Storage
The flash storage will be partitioned to allow the user to either support large ROM sizes or increased number of ROMs stored. By setting the maximum ROM size to a smaller value, there will be more space to store other ROMs on the Storage partition. An example partition scheme is shown below.
| Partition | Size | Purpose |
|---|---|---|
| Firmware | 256KiB | Stores firmware for the RP2040 |
| Storage | Remainder | Wear-levelling filesystem holding ROMs and save files |
USB-C Networking
By utilising RP2040 and TinyUSB features, the USB-C port can act as a networking device, which when attached to a host, will allow the RP2040 to connect to the Internet. Future features will allow supported Game Boy games to make connections to the internet.
Notes
BOM is optimised for purchase from JLCPCB with SMT assembly. The cost of producing a single cart of this revision is approximately £15. This version of the PCB has major errors that can be seen in the errata.md document. Do not manufacture PCB version 0.3 or below; instead wait for the next version or the one on the master branch.
License
The majority of the software within this project are licensed under the terms of the ISC License. Please see the header of each source file for license terms. In brief, the copyright and permission notices must not be modified.
The PCB schematic and layout are licensed under the Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0) license. In brief, you may modify and share but only under the same license to allow others to continue modifying and sharing.
This project includes Libbet and the Magic Floor and 2048-gb, which are both licensed under the terms of the zlib license, and are included within this project in an unmodified binary form for testing purposes.
Showcase
- Pokemon Polished Crystal. A major fan-made upgrade to Pokemon Crystal. Uses MBC3 with battery backed SRAM and Real Time Clock. The version tested had CGB double-speed disabled, which caused minor graphical glitches within the game. An effort is made to fix these graphical glitches at https://github.com/deltabeard/polishedcrystal. DBGC does not currently support double-speed, so using it to play Polished Crystal may not result in the intended experience.
- Mega Man 1. This commercial game uses MBC1 ROM banking.
- 2048-gb. Open source homebrew game. Uses no ROM banking.
Parts
67| Qty | Value | Footprint | References |
|---|---|---|---|
| 19 | 100n | Capacitor_SMD:C_0402_1005Metric | C1, C2, C3, C4, C5, C10, C13, C14, C16, C17, C18, C19, C20, C21, C26, C27 +3 |
| 5 | 1u | Capacitor_SMD:C_0402_1005Metric | C9, C15, C22, C23, C24 |
| 4 | 25k | Resistor_SMD:R_0402_1005Metric | R1, R2, R3, R12 |
| 3 | 330R | Resistor_SMD:R_0603_1608Metric | R11, R13, R14 |
| 3 | SN74LVC8T245PW | Package_SO:TSSOP-24_4.4x7.8mm_P0.65mm | U1, U2, U4 |
| 2 | 1k | Resistor_SMD:R_0603_1608Metric | R6, R7 |
| 2 | 27.4R | Resistor_SMD:R_0603_1608Metric | R8, R9 |
| 2 | 30p | Capacitor_SMD:C_0402_1005Metric | C11, C12 |
| 2 | 5k1 | Resistor_SMD:R_0402_1005Metric | R4, R5 |
| 2 | N-Channel | Package_TO_SOT_SMD:SOT-23 | Q2, Q3 |
| 2 | TestPoint | TestPoint:TestPoint_THTPad_D1.0mm_Drill0.5mm | TP3, TP5 |
| 2 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP1, TP2 |
| 1 | 100k | Resistor_SMD:R_0603_1608Metric | R10 |
| 1 | 32.768kHz | Crystal:Crystal_SMD_Abracon_ABS25-4Pin_8.0x3.8mm | Y2 |
| 1 | Battery_Cell | Project_Specific:MY-2032-11 | BT1 |
| 1 | Crystal_GND24 | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | DS1302Z+ | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U8 |
| 1 | D_Dual_CommonCathode_AAK_Split | Package_TO_SOT_SMD:SOT-23 | D1 |
| 1 | Debug | Connector_PinSocket_1.27mm:PinSocket_1x03_P1.27mm_Vertical | J3 |
| 1 | GameBoy_Cartridge | Gekkio_Connector_PCBEdge:GameBoy_Cartridge_1x32_P1.50mm_Full | J1 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | MB85RS256B | Package_SO:SOIC-8_3.9x4.9mm_P1.27mm | U9 |
| 1 | Motor_DC | Connector_PinHeader_1.27mm:PinHeader_1x02_P1.27mm_Vertical | M1 |
| 1 | RP2040 | RP_RP2040:RP2040-QFN-56 | U6 |
| 1 | SI2301CDS-T1-GE3 | Package_TO_SOT_SMD:SOT-23 | Q1 |
| 1 | SM4007PL | Diode_SMD:D_SOD-123F | D3 |
| 1 | SW_SPST | Button_Switch_SMD:SW_SPST_TL3342 | SW1 |
| 1 | TXU0104 | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U3 |
| 1 | USB_C_Receptacle_USB2.0 | Connector_USB:USB_C_Receptacle_Palconn_UTC16-G | J2 |
| 1 | W25Q128JVSIQ | Package_SO:SOIC-8_5.23x5.23mm_P1.27mm | U5 |
| 1 | XC6206P332MR | Package_TO_SOT_SMD:SOT-23 | U7 |
Questions
How big is the Gb rp2040 cart PCB?
It measures 51.4 × 60.6 mm and has 4 copper layers, 1 mm thick.
What parts does the Gb rp2040 cart use?
67 parts, built around the RP2040, W25Q128JVSIQ, SN74LVC8T245PW and DS1302Z+. 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 Gb rp2040 cart KiCad files?
From the deltabeard/DBGC repository on GitHub, at the commit this page was made from: the board is hw/gb_rp2040_cart.kicad_pcb and its schematic hw/RP2040.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Gb rp2040 cart design in my own project?
Its repository states no licence, so its author keeps all rights: ask deltabeard before reusing the design.
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