| Pin | Description |
|---|---|
| 1 | Audio output (right) |
| 2 | Audio input (right) |
| 3 | Audio output (left/mono) |
| 4 | Audio ground |
| 5 | RGB Blue ground (pin 7 ground) |
| 6 | Audio input (left/mono) |
| 7 | RGB Blue up S-Video C down (1) Component Pb up (2) |
| 8 | Status & Aspect Ratio up (3) • 0–0.4V → off • 5–8V → 16:9 • 9.5–12V → on/4:3 |
| 9 | RGB Green ground (pin 11 ground) |
| 10 | Clock / Data 2 (4) Control bus (AV.link) |
| 11 | RGB Green up Component Y up (2) |
| 12 | Reserved / Data 1 (4) |
| 13 | RGB Red ground (pin 15 ground) |
| 14 | Data signal ground (pins 8, 10 & 12 ground) |
| 15 | RGB Red up S-Video C up Component Pr up (2) |
| 16 | Blanking signal up RGB-selection voltage up • 0–0.4V → composite • 1–3V → RGB |
| 17 | Composite video ground (pin 19 & 20 ground) |
| 18 | Blanking signal ground (pin 16 ground) |
| 19 | Composite video output S-Video Y output |
| 20 | Composite video input S-Video Y input |
| 21 | Shell/Chassis (6) |
|
(1) rarely supported. (2) non-standard extension. (3) from STB to VCR when used for unattended recording (4) protocol not standardised, e.g. D²B (5) bi-directional bus (6) This pin is part of the shell/surround of the male connector. It is often connected to the overall screen in a cheap cable. In equipment, Pin 21 should be connected separately to the chassis, but often it is merely connected to all the other ground pins. output/input denotes symmetrical links | |