I have sent a message FTDI to get pricing.  Looks pretty straing forward,
just plug it in between my exising PIC and the computer.  Not bad at all.

So I take it that all of you looked at using the 16C746 and it was too much
hassle so you whent this route.  Sure seems like Microchip missed the point
on this one then.

Shawn

-----Original Message-----
From: Harold Hallikainen [mailto:harold@HALLIKAINEN.COM]
Sent: Thursday, December 11, 2003 2:57 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [PIC:] First USB project


I recently saw something similar to the FTDI part, but it has everything
(eeprom included) on one chip. It MIGHT have been Cypress Semiconductor.
I've been cleaning my office, so now I can't find anything. But, there is
some competition to the FTDI chip. FTDI is nice in that it hits 250 kbps
that I need. The other all in one chip I saw did not (but it hit 490 kbps
or something like that). Also, I see TI is now in that business. The
all-in-one chip from whoever it was looked real nice, though. I'll watch
for the ad again, or perhaps unbury it in my archeological dig in my
office. Also, on the FTDI chip, they have an eval board that's a nice
small board for about $25 from Saelig. As I recall, you can just plug it
into a DIP socket.

Harold


> If you aren't locked in to the 16c745, you may wish to look at chips
> such as the FTDI series (http://www.ftdichip.com/). They will do USB <->
> Serial or parallel, and the drivers for the PC are available for
> download. One set of drivers emulates a regular com port (so you may not
> have to recode your PC software), the other set of drivers allows you to
> access the chip directly I believe.
>
> I think Wouter has a demo board available.
>
> Josh
> --
> A common mistake that people make when trying to design something
> completely foolproof is to underestimate the ingenuity of complete
> fools.
>         -Douglas Adams
>
> Shawn Yates wrote:
>> I want to use the PIC16C745 to send some simple serial data from my
>> board to
>> a PC.  Really I am already doing that with a 16C67 using the USART, but
>> with
>> computers coming with no serial port any more I just want to switch to
>> USB.
>> I have read some docs and come up with the fact that I have to produce a
>> descriptor.  I am pretty lost at this point.  Everything I read is
>> targeted
>> at such high end things (ISDN, Ethernet etc etc).  I just want to send
>> the
>> same data I had been sending over the USART over the USB.  Can anyone
>> point
>> me in the right direction?
>>
>> I have found the USB to serial adaptors, but since I am making the PCB
>> already I really want to go direct from my product to the computers USB.
>
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