Re: Why would anyone choose EZ-USB?

dalai lamah wrote:
Because as far as I know, it should be the easiest way (and one of the few
ways) to get true High-Speed USB performances.

Good to know. I was under the mistaken impression that the PICs could
actually do high-speed USB.

PIC18F2450 is USB 2.0 *compatible*, it isn't a High-Speed device. Like FTDI
chips and almost every CPUs/MPUs with integrated USB, it supports USB
Full-Speed (12 Mbps), and I can tell you that in most case you will be
lucky if you can reach 4-5 Mbps.

The thing I don't understand is that the clock rates of the PIC and the
8051 core of the EZ-USB are similar... the PIC runs at 12 MIPS while
the CY7C68013A is 48 MHz (roughly ~20 MIPS I think?). I guess the USB
hardware core of the Cypress must be more efficient?

Anyway, good to know the advantages of EZ-USB. I'm still puzzled about
why anyone would actually want the firmware to be in RAM though...

Dan

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