PS1:Connector Pinouts

External

AC In (except PSOne/slim)

Main article: Comparison of Power Supplies

Standard IEC 60320 C8 socket taking an equally standard C7 power cable, except in North America where a nonstandard polarized variant is used.

DC In 7.5V (PSOne/slim only)

Exactly what it says on the tin plastic. Negative ground. Same connector as PS2 Slim (7xxxx) but incompatible voltage.

AV Multi Out

Pin 1 is outermost on console.

Pin	Signal
1	Green*
2	Red*
3	5 V output
4	Blue*
5	ground
6	Chroma
7	Composite
8	Luma
9	Audio Left
10	ground
11	Audio Right
12	ground

* Switchable (and defaulting) to Y/Pr/Pb on PS2 and PS3. DVD-Video and BDMV playback artificially restricted to Macrovision-friendly YPbPr mode.

• At higher than standard-resolution modes, only YPbPr or sync-on-green RGB are available.

S-Video (SCPH-1000 only) and RCA (1xxx/3xxx/5000 only)

Industry standard.

RFU DC Out (1xxx/3xxx/5000 only)

TR minijack; tip 5 V, ring GND.

Serial I/O (except PSOne/slim)

Pin	Signal
1	RXD
2	3.5 V output
3	DSR
4	TXD
5	CTS
6	DTR
7	GND
8	RTS

Parallel I/O (except 9xxx* and PSOne)

* Double exception for early production, which has the connector but no hole in the case!

Actually a main system bus interface. No official use (for consumers, that is) and primarily used for bootable option ROMs (cheat cards/swap facilitators).

to be written

Controller and memory card

Each memory card socket is actually in parallel with the matching controller port (being distinguished in software instead), allowing for interesting aftermarket accessories; in fact, except for pin 6, the left and right pair of slots are also in parallel with each other. The controller interface can be considered, at the hardware level, an implementation of SPI.

On certain PS2 models (SCPH-75xxx and onwards) 7.5 V is not connected on the memory card side, breaking compatibility with older 3rd party memory cards with 5 V logic.

Pin 1 is rightmost looking at the front of the console.

Controller socket

Pin	Signal
1	Data (to console)
2	Command (from console)
3	7.5 V (for motors)
Key
4	GND
5	3.5 V (for logic)
6	Attention (port select)
Key
7	Clock (from console)
8	Interrupt 2 (unused)
9	Interrupt 1 (device presence/data acknowledge)

Memory card slot

Pin	Signal
1	Data (to console)
2	Command (from console)
Blank
3	7.5 V (not on SCPH-75xxx and higher)
4	GND
5	3.5 V
Key
6	Attention (port select)
7	Clock (from console)
8/9	Interrupt 1 (device presence/data acknowledge)

Internal

Power cable

Pin 1 is outermost (facing the power button).

7-pin

Pin	Color	Signal
1	Brown	Switched 7.7 V
2	Red	GND
3	Orange	Switched 3.5 V
4	Yellow	GND
5	White	Unswitched 3.5 V
6	Blue	GND
7	Purple	Reset-switched 3.5 V

5-pin

Pin	Color	Signal
1	Brown	Switched 7.7 V
2	Red	GND
3	Orange	Switched 3.5 V
4	Yellow	GND
5	White	Reset-switched 3.5 V

Optical drive

to be written

Front panel

to be written