ColdFire/68K Microcontrollers and Processors中的主题 Re: USB controller on MCF5474

USB controller on MCF5474

mcf5474 — Tue, 24 Jun 2008 18:45:40 GMT

Hello,

i have some questions about the MCF5474 USB controller:

1. Why is possible in the USBAISR register, that IN as well as OUT Tocken are seted in a definitely OUT Endpoint Interrupt, although the ACK Bit for In-transaction is not seted???

2.Why are core-interrupt as well as endpoint(0-7)-interrupt at the same time there, if the host controller send a In-Tocken to the MCF5474 ???

Thanks in advance for the help.

Re: USB controller on MCF5474

mnorman — Wed, 25 Jun 2008 03:33:49 GMT

I'm sorry to be the bearer of bad news, but the USB Controller on the MCF547x/8x devices has an errata that makes them basically unusable: MCF5475DE

-mnorman

Re: USB controller on MCF5474

mcf5474 — Wed, 25 Jun 2008 13:10:32 GMT

Hallo mnorman,

thanks for the very quick reply. Do you can advise me some other, better MC, analog to the functionality from MCF5474? I use USB, I2C and DSPI...

best regards ivan

Re: USB controller on MCF5474

kmahan — Wed, 25 Jun 2008 13:26:29 GMT

You might consider one of the MCF5445x processors. These are also based on the Coldfire V4e core with a MMU and run Linux. There are variations of the processor with different functionality in them.

The MCF54451 part does not have the PCI and ATA functionality but does have USB, I2C and DSPI - which you mentioned you need.

--Kurt

Re: USB controller on MCF5474

mcf5474 — Fri, 27 Jun 2008 14:17:01 GMT

It is a nice mikroprocessor, i forgot to say, that i need some one with FPU too. Any other recommendations?