Axe programming cable connections

Hello,

I've got a couple of programming cables that have had the tips snapped off of the stereo jack.

If I cut the jack off and solder on a new one, which wires will go where?

thanks
Jon
 

hippy

Technical Support
Staff member
Code:
                                               1/S   2/R   3/T                .---------------.
.----------.   1/S     2/R   3/T           .--------------------.             |               |
|          |---------.-----.-----.       .-|  .--.  .--.  .--.  |   .---------| Serial Out    |
|          |         |     |      \      | |  |  |  |  |  |  |  |   |         |               |
|          |         |     |      /      | |  |  |  |  |  |  |  |   |  .------| Serial In     |
|          |---------^-----^-----'       `-|  |  |  |  |  |  |  |   |  |      |               |
`----------'    |      |      |            `--|  |--|  |--|  |--'   |  |  .---| 0v            |
                |      |      |               `--'  `--'  `--'      |  |  |   |               |
PC RX ----------'      |      |                |     |     |        |  |  |   `---------------'
                       |      |                `-----|-----|--------'  |  |         PICAXE
PC TX -----------------'      |                      |     |  .-----.  |  |
                              |                      }-----|--|     |--'  |
GND --------------------------'                     _|_    |  `-----'     |
                                                   |   |   |    22K       |
                                               10K |   |   |              |
                                                   |_ _|   |              |
                                                     |     |              |
                                                   --^-----^--------------^-- 0v
 

hippy

Technical Support
Staff member
thanks. dont suppose you know the wire colours as well do you?
Unfortunately not, and it is possible the colours vary between production runs.

The best way to determine which is which is to identify which is 0V from a continuity test to the USB plug, then connect a LED+R between the other two and 0V, send something from the terminal and see which wire makes that LED flash; that will be the PC TX line.

Added: If you have cut the plug from the cable with some cable left on the plug end you should be able to pull back the cable sleeve and expose the wires, do a continuity test of wires to the plug to see what that shows.

It's always a good idea to leave some cable connected to anything cut off to allow such wiring determination.

If the cable was cut close to the plug you may be able to break it apart to get some hint on how it was wired.
 
Last edited:
Top