JTag parts and how to and pictures

[NOKIA™]

read here http://www.dssgeeks.com/forums/showpost.php?p=47394&postcount=34


and read here http://www.diygadget.com/store/building-simple-jtag-cable/info_12.html

[kartracer]

Can some one tell me what is the size of the resister? .. in ohms or khms please. I'm not very good with the colours. Thanks.

[RBBB]

they are 100 ohm resisters.....

[kartracer]

On the DB side of the cable, does it go into the serial port or the parallel port on the PC? I'm guessing parallel seeing it's a DB25 male connector. Can someone please confirm? Thanks.

[Peterbilt]

yes it goes in the parallel printer port.

[NOKIA™]

Building Simple JTAG Cable

http://www.diygadget.com/images/jtag/simple_jtag_imgs/0.jpg
Simple JTAG Schematic


http://www.diygadget.com/images/jtag/simple_jtag_imgs/1.jpg
Step 1: Open the package, familiar with all the components. If you have ordered 20 pin configuration, you will not get B and G in the picture. If you have ordered 10 pin configuration, you will not get A and F.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/2.jpg
Step 2: Cut one 100 Ohm resistor as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/3.jpg
Step 3: Put some melted solder into the cup 2, 3, 4, 5, 13, and 18 to 25 of the DB25 male connector as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/4.jpg
Step 4: Use the cutted resistor conductor to connect 18-25 pin together.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/5.jpg
Step 5: Cut the rest resistors as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/6.jpg
Step 6: Solder 5 resistors onto the DB25 connector (pin 2,3,4,5 and 13).


http://www.diygadget.com/images/jtag/simple_jtag_imgs/7.jpg
Step 7: Cut the resistor conductors as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/8.jpg
Step 8: Put some melted solder onto the bare conductors.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/9.jpg
Step 9: (10 pin configuration) Cut and strip the flat cable as shown.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/10.jpg
Step 10: (20 pin configuration) Cut and strip the falt cable as shown.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/11.jpg
Step 11: (10 pin configuration) Put some melted solder onto the bare wires, then put the heat shrink tube onto the wires.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/12.jpg
Step 12: (20 pin configuration) Put some melted solder onto the bare wires, then put the heat shrink tube onto the wires.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/13.jpg
Step 13: (10 pin configuration) Solder flat cable onto the DB25 connector as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/14.jpg
Step 14: (20 pin configuration) Solder flat cable onto the DB25 connector as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/15.jpg
Step 15: (10 pin configuration) Put heat shrink tubes onto the resistors to prevent short circuit.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/16.jpg

http://www.diygadget.com/images/jtag/simple_jtag_imgs/20.jpg

[NOKIA™]

Step 16: (20 pin configuration) Put heat shrink tubes onto the resistors to prevent short circuit.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/17.jpg
Step 17: (10 pin configuration) Align wires on the IDC connector. Make sure line 1 is under the little triangle as shown in the picture. Then squeeze two halves of the IDC connector together until both retainer loops snap over the ribs and lie flat against the sides.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/18.jpg
Step 17: (20 pin configuration) Align wires on the IDC connector. Make sure line 1 is under the little triangle as shown in the picture. Then squeeze two halves of the IDC connector together until both retainer loops snap over the ribs and lie flat against the sides.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/19.jpg
Step 19: (10 pin configuration) Put the strain relief onto the IDC connector. Squeeze the strain relief and the IDC connector.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/20.jpg
Step 20: (20 pin configuration) Put the strain relief onto the IDC connector. Squeeze the strain relief and the IDC connector.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/21.jpg
Step 21: Prepare the DB25 shell as shown in picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/22.jpg
Step 22: (10 pin configuration) Take the two wire holders and clamp them onto the cable. Pay attention to red arrow in the picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/23.jpg
Step 23: (20 pin configuration) Take the two wire holders and clamp them onto the cable. Pay attention to red arrow in the picture.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/24.jpg
Step 24: Put the DB25 connector into one half of the DB shell.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/25.jpg
Step 25: Close up the DB25 shell. Use the remaining two screws and nuts to finish the assembling.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/26.jpg
Step 26: Close up the DB25 shell. Use the remaining two screws and nuts to finish the assembling.


http://www.diygadget.com/images/jtag/simple_jtag_imgs/27.jpg
Step 27: Congratulations! You are done!

[tilley]

You could always do what I did. Order it online. $8 completely assembled and tested including s&h at my door 2 days later. But then again, I'm a lazy dawg.

[Ronson Fuel]

Absolutely amazing instructions!!!

Now if only we can make one using the USB port, we would be in heaven!!!

Cheers

[RBBB]

Here is a pretty straight forward pic of jtag connections to board.....

http://img80.imageshack.us/img80/6825/schematicsarizajtagcablyl7.jpg