Interactive Connector Diagram
Click or tap any pin in the diagram below to inspect its signal assignment, electrical specification, and wire colour standard.
Click any pin to view its signal assignment, electrical spec, and wire colour.
Supported Systems / Found On — Retro Machine Hubs
This connector is used on the following retro computer systems. Click any colour-coded badge below to open its full board-level repair, diagnostic, and schematic Machine Hub:
Connector Specifications
Connector Standard
DIN 45322 (6-Pin 240° Circular, no center pin)
Amstrad CPC Levels
3-Level Ternary R, G, B (27 colours) + Composite Sync (Pin 4)
BBC Micro Levels
5 V TTL Digital R, G, B (8 colours) + CSYNC (Pin 4) + +5 V Out (Pin 6)
SCART Blanking
BBC Micro uses Pin 6 (+5 V via 180 Ω); CPC uses external USB +5 V or 9 V battery
Full Pin Assignment & Wiring Reference
| Pin | Signal Name | Direction | Electrical Spec / Role | Wire Colour / SCART / Adapter Target |
|---|---|---|---|---|
| 1 | RED | Out | Amstrad CPC: Red | BBC Micro / Electron: Red (TTL) | SCART Pin 15 (via 270–330 Ω on BBC; direct/100 Ω on CPC) |
| 2 | GREEN | Out | Amstrad CPC: Green | BBC Micro / Electron: Green (TTL) | SCART Pin 11 (via 270–330 Ω on BBC; direct/100 Ω on CPC) |
| 3 | BLUE | Out | Amstrad CPC: Blue | BBC Micro / Electron: Blue (TTL) | SCART Pin 7 (via 270–330 Ω on BBC; direct/100 Ω on CPC) |
| 4 | /CSYNC (Composite Sync) | Out | Amstrad CPC: /SYNC | BBC Micro / Electron: /CSYNC (TTL) | SCART Pin 20 (via 470 Ω on BBC; direct/220 Ω on CPC) |
| 5 | GND (0 V Shield) | GND | Common Video Ground on BOTH Amstrad CPC and BBC Micro | SCART Pins 5, 9, 13, 17, 18, 21 (GND) |
| 6 | CPC: LUMA | BBC: +5V DC | Out | Amstrad CPC: Green-Screen Luma | BBC Micro: +5 V DC Supply Out! | BBC: SCART Pin 16 via 180 Ω | CPC: Leave NC in RGB SCART |
Amstrad CPC vs. BBC Micro RGB SCART Cable Resistor Guide
Both the Amstrad CPC family (CPC 464, 664, 6128) and the Acorn family (BBC Micro Model B, B+, Master 128, and Acorn Electron) use a 6-pin 240° circular DIN socket (DIN 45322) for RGB output, but with different pin mappings and voltage levels: the Amstrad Gate Array outputs 3-state ternary (Low/Mid/High) RGB for 27 colours, while the BBC Micro Video ULA outputs 5 V TTL digital RGB.
- BBC Micro / Acorn Electron RGB SCART Cable: Put a 270 Ω to 330 Ω resistor in series with Pin 1 (Red -> SCART 15), Pin 2 (Green -> SCART 11), and Pin 3 (Blue -> SCART 7) to drop 5 V TTL to 0.7 Vpp. Put a 470 Ω resistor in series with Pin 4 (CSYNC -> SCART 20), and wire Pin 6 (+5 V) through a 180 Ω resistor to SCART Pin 16 (RGB blanking).
- Amstrad CPC 464 / 6128 RGB SCART Cable: Because the CPC already has internal series resistors on R, G, B, wire Pins 1, 2, 3, and 4 directly (or via 100 Ω protection resistors) to SCART Pins 15, 11, 7, and 20. Leave DIN Pin 6 (Luminance) disconnected!
- Amstrad CPC SCART Pin 16 Blanking & Stereo Audio: Feed +5 V from the CPC's 5 V DC power jack (or a USB plug via a 150 Ω resistor) to SCART Pin 16, and wire a 3.5 mm stereo jack plug from the side of the CPC into SCART Pins 6 (Left), 2 (Right), and 4 (Audio GND).