Raspberry Pi RP2040 Microcontroller
Industrial Cga/ega To Vga Converter
Resumen
An industrial-grade open-frame PCB converter utilizing a mid-range FPGA or dedicated scaler chip to bridge legacy 15/25kHz CGA/EGA video signals to standard VGA for CNC and retro equipment replacement.
FarshidArquitectura del sistema
POWER
MODULE
MCU
ACTUATOR
- POWER_REG → FPGA_PROCESSORPowerCore and I/O power supply for FPGA
- POWER_REG → MCU_OSDPowerPower supply for RP2040 MCU
- POWER_REG → INPUT_INTERFACEPowerPower for level shifters and input protection
- INPUT_INTERFACE → FPGA_PROCESSORGPIODigitized TTL/analog pixel data and sync signals routed to FPGA
- MCU_OSD → FPGA_PROCESSORSPIConfiguration commands and OSD overlay data transmission
- USER_INPUT → MCU_OSDGPIOOSD menu navigation button inputs
- FPGA_PROCESSOR → VIDEO_OUTPUTGPIOGenerated 31.5kHz+ digital video and sync signals to VGA DAC
Lista de materiales
| Número de parte | Tipo | Componente | Fabricante | Encapsulado | Cant. | Hoja de datos | Coincidencia |
|---|---|---|---|---|---|---|---|
| TPS54331DR | POWER | TI TPS54331 Step-Down DC-DC Converter & AMS1117-3.3 Converts incoming regulated +5V DC power down to 3.3V and 1.2V/1.8V rails for core digital logic, MCU, and FPGA. | Texas Instruments | SOIC-8 | 1 | Coincidente | |
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| ICE40UP5K-SG48I | MODULE | Lattice iCE40UP5K FPGA + External SRAM Ingests 15kHz/25kHz CGA/EGA TTL/analog inputs, buffers frames, and performs scan conversion to output 31.5kHz+ VGA. | Lattice Semiconductor Corporation | 48-VFQFN Exposed Pad | 1 | Coincidente | |
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| DE-9 | MODULE | DE-9 Connector Level Shifter & ADC Frontend Interfaces with DE-9 port, handles TTL input protection, level shifting, and analog RGB signal digitization via high-speed comparators/ADCs. | Texas Instruments | — | 1 | Pendiente | |
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| RP2040 | MCU | Raspberry Pi RP2040 Microcontroller Manages user configuration, OSD (On-Screen Display) menu rendering, button inputs, and communication with the FPGA scaler. | SAMTEC | — | 1 | Coincidente | |
| PTS645VM31-2LFS | ACTUATOR | Tactile Push Button Matrix Provides physical button inputs (Menu, Up, Down, Auto) for navigating the OSD configuration menu. | C&K | SMD | 1 | Coincidente | |
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| HD-15 | MODULE | HD-15 VGA Output DAC & Buffers Converts digital video stream from FPGA into standard analog RGBHV signals via high-speed video DAC and output buffers for the HD-15 VGA port. | Analog Devices | — | 1 | Pendiente | |
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Guía de ensamblaje
3-5 hoursAdvanced
1
Procurement & Preparation
- Source and inventory all raw components including TPS54331DR, AMS1117-3.3, ICE40UP5K-SG48I, RP2040, DE-9 connector, HD-15 VGA connector, PTS645VM31-2LFS tactile buttons, external SRAM, and passives.
- Inspect the open-frame PCB for manufacturing defects, check copper trace continuity on power rails (5V, 3.3V, 1.2V), and prepare the stencil for solder paste application.
2
Hardware Assembly & Wiring
- Apply Type 4 lead-free solder paste to the PCB pads using the alignment stencil, and use a pick-and-place machine or manual placement tool to position surface-mount ICs including TPS54331DR, AMS1117-3.3, ICE40UP5K-SG48I, external SRAM, RP2040, and level shifters.
- Run the populated PCB through the reflow oven following a standard lead-free thermal profile. Inspect solder joints under a microscope for bridging or cold joints.
- Manually place and solder through-hole components including the DE-9 input connector, HD-15 VGA output connector, and the PTS645VM31-2LFS tactile button matrix.
3
Firmware Setup
- Connect the SWD/Debug header to the Raspberry Pi RP2040 microcontroller and flash the OSD configuration and management firmware.
- Program the Lattice iCE40UP5K FPGA with the scan-conversion bitstream via SPI/JTAG interface to process 15kHz/25kHz CGA/EGA timings into 31.5kHz+ VGA output.
4
Testing & Calibration
- Apply regulated +5V DC power to the input terminals and measure power rails (3.3V, 1.2V) using a digital multimeter to verify the operation of the TPS54331 and AMS1117 regulators.
- Connect a known CGA/EGA 15kHz video source (e.g., legacy industrial CNC machine or retro computer) to the DE-9 port and a standard VGA monitor to the HD-15 port.
- Test the tactile push button matrix (Menu, Up, Down, Auto) to navigate the On-Screen Display (OSD) menu, adjusting geometry, scaling, and sync parameters for optimal image quality.
Documento
Industrial Cga/ega To Vga Converter
An industrial-grade open-frame PCB converter utilizing a mid-range FPGA or dedicated scaler chip to bridge legacy 15/25kHz CGA/EGA video signals to standard VGA for CNC and retro equipment replacement.
Design Overview
| Item | Details |
|---|---|
| Product Type | Cga/ega To Vga Converter Module |
| Key Functions | Convert 15kHz/25kHz CGA/EGA TTL and analog video signals to standard 31.5kHz+ VGA, Support digital TTL and analog input levels via DE-9 connector, On-screen display (OSD) menu for configuration and adjustments, Industrial-grade 24/7 reliability for CNC machine and retro computer replacement |
| Power Source | Standard +5V DC regulated power supply |
| Connectivity | DE-9 (DB9) input connector, HD-15 (VGA) output connector |
| Size | Open-frame bare PCB designed to mount inside an existing chassis |
| Environment | Industrial indoor/cabinet environment, 24/7 continuous operation |
| Difficulty | Advanced |
| Est. Time | 3-5 hours |
System Architecture
Power Topology: Standard +5V DC regulated power supply input feeds a step-down DC-DC converter (TPS54331) to generate intermediate rails, followed by low-dropout regulators (LDOs) to supply clean 3.3V and 1.2V for the FPGA core, IO, and MCU.
Module List
| Module ID | Type | Name | Function | Voltage |
|---|---|---|---|---|
| POWER_REG | POWER | TI TPS54331 Step-Down DC-DC Converter & AMS1117-3.3 | Converts incoming regulated +5V DC power down to 3.3V and 1.2V/1.8V rails for core digital logic, MCU, and FPGA. | 5V -> 3.3V/1.2V |
| FPGA_PROCESSOR | MODULE | Lattice iCE40UP5K FPGA + External SRAM | Ingests 15kHz/25kHz CGA/EGA TTL/analog inputs, buffers frames, and performs scan conversion to output 31.5kHz+ VGA. | 3.3V/1.2V |
| INPUT_INTERFACE | MODULE | DE-9 Connector Level Shifter & ADC Frontend | Interfaces with DE-9 port, handles TTL input protection, level shifting, and analog RGB signal digitization via high-speed comparators/ADCs. | 5V/3.3V |
| MCU_OSD | MCU | Raspberry Pi RP2040 Microcontroller | Manages user configuration, OSD (On-Screen Display) menu rendering, button inputs, and communication with the FPGA scaler. | 3.3V |
| USER_INPUT | ACTUATOR | Tactile Push Button Matrix | Provides physical button inputs (Menu, Up, Down, Auto) for navigating the OSD configuration menu. | 3.3V |
| VIDEO_OUTPUT | MODULE | HD-15 VGA Output DAC & Buffers | Converts digital video stream from FPGA into standard analog RGBHV signals via high-speed video DAC and output buffers for the HD-15 VGA port. | 3.3V/5V |
Key Components
4/6 modules matched to real parts. See the BOM tab for the full component table.
TI TPS54331 Step-Down DC-DC Converter & AMS1117-3.3 (TPS54331DR)
Candidate 2 matches the primary MPN 'TPS54331DR' with the correct ordering suffix and is manufactured by Texas Instrumen
DE-9 Connector Level Shifter & ADC Frontend (DE-9)
Rejected weak/wrong-class catalog hits; using web recommendation: DE-9
Raspberry Pi RP2040 Microcontroller (RP2040)
The candidate has the exact MPN 'RP2040' matching the primary MPN, even though the listed manufacturer is incorrect in t
HD-15 VGA Output DAC & Buffers (HD-15)
Rejected weak/wrong-class catalog hits; using web recommendation: HD-15
Build Summary
- Difficulty: Advanced
- Estimated time: 3-5 hours
- Tools required: Antistatic tweezers, Component counter, Multimeter, PCB stencil, Squeegee, Digital microscope
See the Build tab for the full step-by-step assembly guide.
Generated by YuanQi AI Design System · Query: Design a CGA/EGA to VGA converter circuit / module to convert older industrial or retro computer RGB video signals (CGA/EGA TTL/analog levels, 15/25kHz) to standard VGA (VGA 31.5kHz+).