Port Pinout Assignments and
Specifications

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Illustrations, pinouts, and specifications are provided for the following ports:

Audio Ports and Specifications

Other Peripheral Ports

Graphics Ports

Audio Ports

Microphone

Microphone Port Pinout

Microphone Tip Ring Sleeve
Silicon Graphics supplied electret mono microphone Signal(+) Signal(+) Ground(-)
Line level mono microphone Ground (-) Signal (+) Ground (-)

Microphone Specifications

Microphone Jack

Connector
3.5 mm stereo mini (mono signal on tip and ring)
Power
+5 phantom power on tip
Type
Unidirectional electret condenser


Speaker

Speaker Power Port Pinout

Speaker Power Tip
Sleeve
10 Volt DC Power (+) Ground
500 mA



Speaker/headphone Tip Ring Sleeve

Left Right Ground



Speaker Specifications

Speakers
Power 3 W (average) per channel
Frequency range 180Hz - 15K Hz
Magnetic flux leakage <50mGauss @2cm
Input impedance 150 ohms
Signal connector 3.5 mm stereo mini
Power connector 2.5 mm mono micro

Headphone Specifications

Headphone
Recommended impedance 35 ohms
Connectors 3.5 mm stereo



Analog Line Level Audio

Analog Line Level Audio Specifications
Line In
Line Out
Line level -10dBV -10dBV
OdBFS Maximum +10dBV to -22dBV 6.5dBV 0.5dBV


Coaxial Digital Audio

Coaxial Digital

Optical Digital Audio

Optical Digital

Other Peripheral Ports


SCSI

Pin Assignment Pin Assignment
1 Ground 35 -DB(12)
2 Ground 36 -DB(13)
3 Ground 37 -DB(14)
4 Ground 38 -DB(15)
5 Ground 39 -DB(P1)
6 Ground 40 -DB(0)
7 Ground 41 -DB(1)
8 Ground 42 -DB(2)
9 Ground 43 -DB(3)
10 Ground 44 -DB(4)
11 Ground 45 -DB(5)
12 Ground 46 -DB(6)
13 Ground 47 -DB(7)
14 Ground 48 -DB(P)
15 Ground 49 Ground
16 Ground 50 Ground
17 Termpwr 51 Termpwr
18 Termpwr 52 Termpwr
19 Open 53 Open
20 Ground 54 Ground
21 Ground 55 -ATN
22 Ground 56 Ground
23 Ground 57 -BSY
24 Ground 58 -ACK
25 Ground 59 -RST
26 Ground 60 -MSG
27 Ground 61 -SEL
28 Ground 62 -C/D
29 Ground 63 -REQ
30 Ground 64 -I/O
31 Ground 65 -DB(8)
32 Ground 66 -DB(9)
33 Ground 67 -DB(10)
34 Ground 68 -DB(11)

Ethernet 10-Base T/100-Base T Port

Pin Assignment
1 Transmit+
2 Transmit-
3 Receive+
4 (Reserved)
5 (Reserved)
6 Receive-
7 (Reserved)
8 (Reserved)

Parallel Port

IEEE 1284-C for a Printer

Pin Assignment Pin Assignment
1 Busy 19 Signal Ground (Busy)
2 Select 20 Signal Ground (Select)
3 nAck 21 Signal Ground (nAck)
4 nFault 22 Signal Ground (nFault)
5 PError 23 Signal Ground (PError)
6 Data 1 24 Signal Ground (Data 1)
7 Data 2 25 Signal Ground (Data 2)
8 Data 3 26 Signal Ground (Data 3)
9 Data4 27 Signal Ground (Data 4)
10 Data5 28 Signal Ground (Data 5)
11 Data 6 29 Signal Ground (Data 6)
12 Data 7 30 Signal Ground (Data 7)
13 Data 8 31 Signal Ground (Data 8)
14 nInit 32 Signal Ground (nInit)
15 nStrobe 33 Signal Ground (nStrobe)
16 nSelectIn 34 Signal Ground (nSelectIn)
17 nAutoFd 35 Signal Ground (nAutoFd)
18 Host Logic High 36 Peripheral Logic High

Keyboard and Mouse Ports (6-pin MINIDIN PS/2(TM) Compatible)

Pin Assignment
1 Keyboard/mouse data
2 (Reserved)
3 Ground
4 Keyboard/mouse power (+5 V)
5 Keyboard/mouse clock
6 (Reserved)


Serial Ports

Pin Assignment


1 DCD Data Carrier Detect
2 RD Receive Data
3 TD Transmit Data
4 DTR Data Terminal Ready
5 SG Signal Ground
6 DSR Data Set Ready
7 RTS Request to Send
8 CTS Clear to Send
9 RI Ring Indicator


For serial converter cables see Serial Cables and Converters

Graphics Ports

Monitor

Pin Assignment
A1 Red Signal, Analog
A2 Green Signal, Analog
A3 Blue Signal, Analog
1 Monitor ID Bit 3, TTL
2 Monitor ID Bit 0, TTL
3 Composite Sync (Active Low), TTL
4 Horizontal Drive ()Active High), TTL
5 Vertical Drive (Active High), TTL
6 Montior ID Bit 1, TTL
7 Monitor ID Bit 2, TTL
8 Ground
9 Ground
10 Ground


Stereo View Port

Pin Assignment
1 Stereo left/right Eye Signal (1=left, 0=right) (STEREO_LEFT)
2 Signal Return Ground
3 Reserved for Future Use
4 Signal Return Ground (Frame lock ground)
5 Reserved for Future Use (Frame lock)
6 Digital Return Ground
7 Digital Return Ground for Stereo View
8 +12V DC Output to Stereoview Device
9 Unused