Xiaofan Chen wrote:
> EZ-USB FX2LP is probably one of the most popular USB Hi-Speed
> MCUs. But the core (8051) limits its usage for some applications.

It's not too bad for data-pumping -- set the GPIF interface to talk =

whatever bus standard you like (it's configurable almost to the point of =

insanity and makes the PIC's Synchronous Parallel Port look like a toy), =

then tie it to an endpoint and trigger it.

For actual data processing it'll be terrifically slow -- it's a =

pureblood 8051, meaning a MHz-to-MIPS ratio of 12:1 (12MHz =3D 1MIPS vs =

the PIC's 4MHz =3D 1MIPS). So it's not the fastest chip in the world, but...
   - The volatile firmware means you basically can't brick it
   - There's free development software available (SDCC, Metalink =

assembler, ASM51, etc.). I think Cypress are supplying a demo version of =

IAR with their devkits... don't assume that's essential :)
   - The documentation is pretty good (but when printed is just about =

heavy enough to damage a cheap coffee table)
   - They're relatively cheap (=A33.63 each for the 68014A in 56pin BGA, =

up to =A313.89 for the 68014A in 56pin SSOP, or =A312.12 for the 128-pin QF=
P =

version of the 68014A). Interestingly the standard parts are more =

expensive than the "low suspend current" parts.
     I've been using the CY7C68014-56PVXC, which is a 56pin SSOP and =

fairly easy to solder. I have yet to try soldering the QFN parts, but =

that ground pad on the base looks especially tricky...

> For the AVR 32, only the AP7 Application Series (more like a MPU
> than MCU) has Hi-Speed USB. The UC3A/B/L do not have Hi-Speed
> USB.
> http://www.atmel.com/dyn/products/devices.asp?family_id=3D682

Nice... Aside from the price tag (and no doubt the "Atmel Availability").

-- =

Phil.
piclist@philpem.me.uk
http://www.philpem.me.uk/

-- =

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