GTP USB + user ???

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ful babu

Joined: 11 Nov 2004
Posts: 167
Helped: 11
Location: Singapore

29 Mar 2007 16:43 GTP USB + user ???

I just received a GTP USB + and i made a zif socket pcb for it, but ironically only 18pin pics' are working. For 40 pin pics it says "Write error". i double checked my circuit nothing seems to be wrong. any one know what might be the mistake ?

thanx

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ful babu

Joined: 11 Nov 2004
Posts: 167
Helped: 11
Location: Singapore

30 Mar 2007 18:21 Re: GTP USB + user ???

any way as no reply... any one have pcb layout for ZIF socket for GTP USB +

thax

nomad13

Joined: 29 Jan 2007
Posts: 154
Helped: 12

02 Apr 2007 6:27 Re: GTP USB + user ???

Do you have the diagram now?

Where are you planning to use it? Beside it is now useful if you don't have the firmware for it. Do you have a copy of the firmware?

Here is the board layout for the zif socket. It is made from Eagle.

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ful babu

Joined: 11 Nov 2004
Posts: 167
Helped: 11
Location: Singapore

02 Apr 2007 20:06 Re: GTP USB + user ???

nomad13 wrote:

I have this layout already, this is not GTP USB "PLUS" , it is only GTP USB, i have the firmware for this old gtp usb, but the new GTP USB PLUS ' s firmware is not free and not easy to copy. I bought the programmer.

Any way i did some research about my GTP USB + and my findings are as below, can anyone explain why it is happening ?

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