RS 20-047 Cable Pinout

Status
Not open for further replies.

K5RYA

Member
Joined
Sep 3, 2008
Messages
88
Location
Spring, TX
Does anyone know the pinout of the connectors on the Radio Shack programming cable (#20-047)? As in which parts of the ring/sleeve/tip are for rx/tx? Also is this cable basically a USB to RS232 to TTL device?
 

Evert

Member
Joined
Jul 29, 2008
Messages
332
Location
West River South Dakota
Yes, the 20-047 is “basically a USB to RS232 to TTL device”. The main chip is an FTDI FT232BL that does the USB to RS232 part.

As to the stereo plug pinout, I am pretty sure that the Radio Shack/GRE version follows the same pinout that FTDI uses on their complete USB to TTL cables such as the TTL-232R-AJ shown below for full-duplex mode. For half-duplex, the tip serves for both tx and rx.
 

Attachments

  • TTL-232R-AJ.jpg
    TTL-232R-AJ.jpg
    15 KB · Views: 9,034
Last edited:

K5RYA

Member
Joined
Sep 3, 2008
Messages
88
Location
Spring, TX
Thanks for the response. I managed to figure it out but I will save the diagram for future reference.


I managed to get my Minitor V programmed using my RadioShack programmer!!
 
Joined
Feb 3, 2009
Messages
2,078
Location
So Far Away....
Evert..

You Rock Man,the need for this info arose only 6 minutes ago,now the pic's on my desktop..
good info to have on the RR forums,
Many Thank You's!
 

gmclam

Member
Premium Subscriber
Joined
Sep 15, 2006
Messages
6,335
Location
Fair Oaks, CA
If you look at the signals from the cable, both ring AND sleeve are transmitted on from the PC.
 
Status
Not open for further replies.
Top