Cypress  do a USB host controller aimed at microcontrollers - SL811HS

On Fri, 29 Nov 2002 10:06:44 +0100, you wrote:

>All of the information I've found related to PICs and USB deals with
>building a perephrial device on a USB bus.  Is there any information
>available for implementing a (very simple) PIC based USB host?  From =
what I
>understand USB hosts need quite a few system resources bacause the USB
>drivers support a wide variety of devices.  What I'm interested in is =
just
>building a "simple" host that supports a very limited number of device =
types
>(well only one really).  Basically, I've got a USB webcam, and I would =
like
>to be able to grab a frame off of it and write it to an external memory
>device.  I have to admit that I'm completely new to micro controllers =
and
>USB so if this idea is way off base just let me know.
>Thanks.
>Jason.
>
>
>-----Original Message-----
>From: pic microcontroller discussion list
>[mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Tony K=FCbek
>Sent: 29. november 2002 9:30AM
>To: PICLIST@MITVMA.MIT.EDU
>Subject: Re: [PIC]: USB peripherals for microcontroller
>
>
>Hi,
>
>Brendan Moran wrote:
>>So, while looking for a usb micro, I came across another solution.
>>National makes two USB peripherals with part numbers USBN9603
>>(http://www.national.com/pf/US/USBN9603.html) and USBN9604
>>(http://www.national.com/pf/US/USBN9604.html).
>>They both contain the full requirements for connection at high speed to
>the
>>USB, the 9604 is for bus powered operation, and the 9603 is for self
>>powered operation.  They both run off of  24MHz crystals.
>>
>>These are devices that connect much the way a memory would.  They
>connect
>>either in serial mode, via SPI, or in parallel mode, with an 8-bit bus.
>>
>>Looks to me like a simple solution for how to get a PIC onto USB.
>>
>>Of course writing the subsequent driver is another question entirely,
>but
>>it is an easy way to handle the hardware with primarily existing
>components.
>
>Well one's milage may wary depedning on the purpose of thew usb i/f but
>for me I think the absolute best solution is to use one of the FTDI
>chip's
>then there's no need to worry about drivers rtc. ( they're included ).
>Also fairly cheap ( <5$).
>
>Look at: http://www.ftdichip.com/
>
>Really awsome, serial (aka RS232) or parallel versions, protoboard etc.
>
>Neat critters.
>
>/Tony
>
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