Serial Cable
From LinuxMIPS
Revision as of 01:11, 24 September 2005 by Sjlongland (Talk | contribs)
This is the way you need to solder your cable.
Serial connector pinouts
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| Name (V24) | DB25 Pin# | DB9 Pin# | MiniDIN8 Pin# | Direction | Full Name | Remarks |
| TxD | 2 | 3 | 3 | Out | Transmit Data | Data |
| RxD | 3 | 2 | 5 | In | Receive Data | Data |
| RTS | 4 | 7 | 6 | Out | Request To Send | Handshaking |
| CTS | 5 | 8 | 2 | In | Clear To Send | Handshaking |
| DTR | 20 | 4 | 1 | Out | Data Terminal Ready | Status |
| DSR | 6 | 6 | - | In | Data Set Ready | Status |
| RI | 22 | 9 | - | In | Ring Indicator | Status |
| DCD | 8 | 1 | 7 | In | Data Carrier Detect | Status |
| GND | 7 | 5 | 4,8 | - | Signal ground | Reference level |
| - | 1 | - | - | - | Protective ground | Don't use this one as signal ground! |
How to connect the connectors
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DTR - Data Terminal Ready 1 | 6 DSR - Data Set Ready
CTS - Clear To Send 2 | 4 RTS
TD - Transmit Data 3 | 3 RD
SG - Signal Ground 4,8 | 7 SG
RD - Receive Data 5 | 2 TD
RTS - Request To Send 6 | 5 CTS
DCD - Data Carrier Detect 7 | 20 DTR
Shield | 1 Protective Ground
It it might be needed to have a connection between pin 20 and pin 8 on the Sub-D 25 connector to have your terminal do a carrier detect. SGI is using the same pin-pout for it's 8-pin mini-DIN connectors as Apple for it's machines. Therefor cables and adapters suitable for use with Apple system may be used.
