what ic would i need to make it into a usb connection to the pc and not parralel?
The connections from the usb socket go to the yellow and red spots below the ic position.
Thanks.
Tiggerlator
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Convert to usb?
Moderators: _X7JAY7X_, caesar, IFR, mattcro, limbo, Fast351, hydrolisk1792
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tiggerlator
- Posts: 3
- Joined: July 21st, 2009, 12:44 pm
Convert to usb?
I have this board which is for parralel connection.It has a usb connector on it which is used for power,it also has a space for an ic to interface via usb too.
what ic would i need to make it into a usb connection to the pc and not parralel?
The connections from the usb socket go to the yellow and red spots below the ic position.
Thanks.
Tiggerlator
what ic would i need to make it into a usb connection to the pc and not parralel?
The connections from the usb socket go to the yellow and red spots below the ic position.
Thanks.
Tiggerlator
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spauka
- Posts: 21
- Joined: June 23rd, 2009, 12:01 pm
- Location: Sydney, Australia
Re: Convert to usb?
Its rather difficult to tell, given that there isnt much info on the schematics, however, it does look like it is one of the FTDI chips that would match up with that board.
Their website is: http://www.ftdichip.com and at a guess i would GUESS it may be the FT245R http://www.ftdichip.com/Products/FT245R.htm although, the data lines are covered up, so i cant quite tell for sure, although the circuit, after a rather precursory check, does seem to match.
Hope that helps
Their website is: http://www.ftdichip.com and at a guess i would GUESS it may be the FT245R http://www.ftdichip.com/Products/FT245R.htm although, the data lines are covered up, so i cant quite tell for sure, although the circuit, after a rather precursory check, does seem to match.
Hope that helps
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caesar
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Re: Convert to usb?
No, can't be an FT245R.
Besides the poor design of the quartz position (long lines and not masked by a ground plane) it states a 4MHz clock. FT245R has an internal clock source and even if an external would be used it must be either 6MHz or 12MHz to generate a USB compatible timing.
It looks like a PIC18F2550 from microchip considering the capacitor connections and the fact that all 8 data lines are on the right side (pin 21 to 28, 28 being top right and 1 top left).
If pin 1 top left is connected the 10K R1 free through hole pin then it's certainly a the mentioned PIC chip.
In that case you can modify ch242's source from his PIC USB project
Besides the poor design of the quartz position (long lines and not masked by a ground plane) it states a 4MHz clock. FT245R has an internal clock source and even if an external would be used it must be either 6MHz or 12MHz to generate a USB compatible timing.
It looks like a PIC18F2550 from microchip considering the capacitor connections and the fact that all 8 data lines are on the right side (pin 21 to 28, 28 being top right and 1 top left).
If pin 1 top left is connected the 10K R1 free through hole pin then it's certainly a the mentioned PIC chip.
In that case you can modify ch242's source from his PIC USB project
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spauka
- Posts: 21
- Joined: June 23rd, 2009, 12:01 pm
- Location: Sydney, Australia
Re: Convert to usb?
Yep, it looks like caesar is correct. In that case, you will also need to program your PIC chip. So if you havent already got one, you will need to get a PIC programmer. It looks like its programmed using the ICSP interface, for which there are quite a few designs and programmers out there. Good Luck