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Originally Posted by bigbop
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I just relaized that Dell has a CF serial interface on their website for $49 - It's just that you will have to build an RS232 level shifter for it because it's normally used with the Pharos GPS-360 module.
Have a look here: http://accessories.us.dell.com/sna/p...&page=external
And you get a nice interface cable as well!
Pinouts for the Pharos GPS-360 are here: http://groups.google.com/group/sci.g...t&rnum=1&hl=en
Now, I'm not saying this provides all the EIA RS232 signals, but it does provide 3v TTL Rx & Tx lines, so I bought one to play with. Will let everyone know how it works.
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My-O-my - got it less than 24 hours after ordering from Dell.ca - and it's a true CF SERIAL (TTL only) card!!! :approve: :approve:
Here's what my X50v sees:
PNP name: CF_CARD-GENERIC-A569
Port: comm 4
Dev ID: 43
Socket: 0
Driver: serial.dll
Rgy entry: drivers\pcmcia\serial
So now I'm trying to carefully open the case so I can see what the pin connections are.
I DO know that even though there are 12 pins, they are doubled. There are actually only 6 pins used and the external cable connector that fits over the GPS module connector only has 6 wide pins inside.
There are two GND, 1-Vcc, Rx & Tx. I need to figure out what the 6th pin does.
UPDATE:
The serial chip inside the CF card is an Oxford Semicondictor OXCF950:
http://www.oxsemi.com/oxford/documen...t/OXCF950.html
The CF card pinout:
(pin 1 is at the top of the picture)
1,2 - Gnd
3,4 - 3V
5,6 - Gnd
7,8 - Rx (0-3v into the CF card)
9,10 - Gnd
11,12 - Tx (0-3v to the GPS)
The following are not connected on the OXCF950 chip:
DTR, RTS
The following are tied to +3V on the OXCF950 chip:
RI,DCD,DSR,CTS
There is enough open space on the PCB to mount a MAX3232 (surface mount package) and to bring out the wires though the plastic housing to a DB9 mounted on the back. That way, you can still use the CF adapter with the Pharos GPS if you wanted to.
Sorry about the crappy pix taken with a Treo600
Stay tuned......
