As far as I know all SX can be driven at 75MHz, and somewhere I have read that there will be a 100MHz one as well. SX not just missing the USB interface but nearly all the others as well, so I2C, USART or A/D for example. What they do is to emulate all of these devices with software (or by adding other hardware components). If you need that speed for digital processing then it is fine, however, for a USB virtual interface you have to allocate quite a lot of MCU time. You can use though one dedicated chip for the USB and another one for the digital processing... But you may need to get a microprocessor instead. The website is: http://www.parallax.com/sx/index.asp Tamas On 03/09/06, fsdfsf sdfsdfsfsdf wrote: > > Hello, > I want to use an sx pic to increase my mips, I want an 80 Mips > speed at the very minimum. > Which sx should I choose. Also, which programmer do > I need for it, and how can I transfer data from sx to pic - I plan > to have both of them talking to each other, using the pic for > usb work, and the sx for some very high speed data processing. > I am assuming sx does not have a usb chip like the 18f4550. > Thanks for any ideas. > p.s. where do I find datasheets for sx, what is the sx website? > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > -- unPIC -- The PIC Disassembler http://unpic.sourceforge.net -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist