In order to connect the RS-232 from the Iris or Ixora carrier boards to a DB9 connector, you must assemble a 10-pin IDC to DB9 adapter. The following steps will guide you through assembling your adapter cable.
- 9 Pin Serial Cable Pinout Colors
- Rs232 9 Pin
- Usb To 9 Pin Serial Pinout
- 9 Pin Serial Cable Pinout
- Standard 9 Pin Serial Cable Pinout
- Rs 232 9 Pin Pinout
This RS232C DE-9 (usually miscalled DB-9) port is available in some PCs and many other devices. An RS-232 serial port was once a standard feature of a personal computer, used for connections to modems, printers, mice, data storage, uninterruptible power supplies, and other peripheral devices. SWD Pinout; Pin Signal Type Description; 1: VTref: Input: This is the target reference voltage. It is used to check if the target has power, to create the logic-level reference for the input comparators and controls the output logic levels to the target. The D-subminiature or D-sub is a common type of electrical connector. They are named for their characteristic D-shaped metal shield. Connector usually contains two or more parallel rows of pins or sockets surrounded by a D-shaped metal shield that provides mechanical support, ensures correct orientation, and screen against electromagnetic interference. Pinout of Serial dsub9 to dsub25 adapter schematic and layout of 9 pin D-SUB male connector and 25 pin D-SUB female connectorThis adapter will enable you to connect a 25 pin serialcable to a 9 pin connector at the computer. Pinouts / Devices / Connectors. Serial cable wiring.
You may buy one adapter, paying attention to the standard - usually called DTK or Intel standard. It is available in the Carrier Board Accessory Kit and from many electronic components suppliers, e.g. here.
Bill of Materials
You will need:
- 10-pin IDC female connector
- 10 way ribbon cable (>10cm)
- DB9/D-sub female connector (preferably a 10-pin IDC to 9-pin D-sub male connector)
- Solder wire and soldering iron, depending on your DB9/D-sub connector
Download game full crackplaytree. Note: you may use another cable type and length, depending on your preference
The image below presents the bill of materials required for the adapter:
Serial adapter BOM
Verify the UART pinout
Verify the pinout of the carrier board pin header and the serial DB9 connector.
IDC pinout
DB9 pinout
Warning: The TX from the IDC header must be connected to the RX from the DB9 connector. The RX from the IDC header must be connected to the TX from the DB9 connector.
Crimp the IDC connector
Crimp the ribbon cable to the IDC connector.
Crimped IDC connector - top view
Crimped IDC connector - bottom view
Note: It might be interesting to define a pattern in this step such as always having the ribbon cable to the left of the even pins of the connector, since the carrier board does not have an IDC header to prevent inverted polarity, but instead only a pin header.
Crimp the DB9 connector
If you have an IDC to DB9 connector, also crimp it paying attention to the pins correspondence.
Crimped IDC to DB9 connector
Beware that you may either:
- Invert the Tx and Rx pins, or;
- Use a null modem cable/adapter, or;
- Use a serial to USB adapter that accepts configurable Tx and Rx pins.
Note: if nothing appears on the serial terminal emulator, consider the hypothesis that Tx and Rx pins may be inverted.
Strip the ribbon cable
If your DB9 connector needs to be soldered, do it only for the Tx, Rx and ground pins. Strip the ribbon cable:
Warning: customers reported issues if all pins are connected, therefore we recommend that you only solder the Tx, Rx and GND as described in the upcoming instructions.
Stripped ribbon cable ways - they are ordered as required to correctly fit in the DB9 connector
Solder the DB9 connector
Solder the ribbon cable into the DB9 connector:
Ready to solder
9 Pin Serial Cable Pinout Colors
Ribbon cable soldered to the DB9 connector
Rs232 9 Pin
Assemble the shield
Assemble the shield. A simple way to protect the integrity of the cable (if you are using a ribbon cable) is to use hot glue.
Assembling the shield
Hot glue detail
Assembled adapter cable
Usb To 9 Pin Serial Pinout
Verify the adapter integrity
9 Pin Serial Cable Pinout
Use a multimeter in the continuity tester mode to make sure that the cable is correctly assembled.
Standard 9 Pin Serial Cable Pinout
Rs 232 9 Pin Pinout
Continuity test