RGB21 connector
Contents |
Description
The RGB21 connector (called also RGB Multi) is the same connector that is used for SCART, but the pinout has a different meaning. Specifications are also more or less different. This connector is a standard established by EIAJ (EIAJ CPR-1201).
Pinout (RGB and Composite Video)
| Pin | Description | Signal level | Impedance |
|---|---|---|---|
| 1 | Audio left/mono channel input | 0.4V (rms) | 47 kΩ |
| 2 | Audio left/mono channel output | 0.4V (rms) | 10 kΩ |
| 3 | Audio channel inputs ground | ||
| 4 | Audio channel outputs ground | ||
| 5 | Audio right channel input (N.C. on MSX) | 0.4V (rms) | 47 kΩ |
| 6 | Audio right channel output (N.C. on MSX) | 0.4V (rms) | 10 kΩ |
| 7 | C-Sync input ground | ||
| 8 | C-Sync output ground | ||
| 9 | C-Sync (Composite Video) input | 1V (p-p) | 75 Ω |
| 10 | C-Sync (Composite Video) output | 1V (p-p) | 75 Ω |
| 11 | AV control input | 3 ~ 5V | 22k Ω |
| 12 | YM input (RGB video mask) | 1 ~ 3V | 75 Ω |
| 13 | Red signal ground | ||
| 14 | YM & YS ground | ||
| 15 | Red signal (I/O) | 0.7 V (p-p) | 75 Ω |
| 16 | YS input | 0 ~ 0.4V = Composite mode 1.0 ~ 3.0V = RVB mode | 75 Ω |
| 17 | Green signal ground | ||
| 18 | Blue signal ground | ||
| 19 | Green signal (I/O) | 0.7 V (p-p) | 75 Ω |
| 20 | Blue signal (I/O) | 0.7 V (p-p) | 75 Ω |
| 21 | Plug shield |
List of MSXs with RGB21 connector
- MSX National CF-3000, CF-3300 and FS-4000
- National CF-2601 superimpose unit for the MSX National CF-3000/CF-3300
- MSX Sanyo MPC-11
- MSX Victor HC-7
- Sanyo MPC-X Graphic Expander Unit for several Japanese MSX Sanyo computers
- Toshiba HX-T330 superimpose unit for several Japanese MSX and MSX2 Toshiba computers
- Victor HC-A602S superimpose module for the MSX Victor HC-5, HC-6 and HC-60
- MSX2 National FS-4500, FS-4700, National FS-5000F2, FS-5500F1 and FS-5500F2
- MSX2 Sony HB-F5 and HB-F500
- MSX2 Victor HC-80
- MSX2 Mitsubishi ML-G30 Model 1 and ML-G30 Model 2 with the optional interface ML-35AV
How to make a RGB21 to SCART cable
Connect the wires as follows.
| RGB21 | Signal | SCART |
|---|---|---|
| 15 | Red signal | 15 |
| 19 | Green signal | 11 |
| 20 | Blue signal | 7 |
| 10 | Sync/Video | 20 |
| 2 | Audio left | 6 |
| 6 | Audio right | 2 |
| 11 | +5V (or better +12V) | 8 |
| 7, 3, 21, 13, 18 and 17 | Corresponding grounds | 5, 9, 18, 13, 14 and 17 |
| 21 | Plug shield | 21 |
It is often necessary to add the following components:
- A 100~220μF polarized capacitor on each RGB pin of the scart. (Three same capacitors, the + connected on the wire that go to the RGB21 connector)
- A 100 Ω resistor between the pin 8 of RGB21 and the pin 16 of the SCART.