AVR-Chat

> 32bits host only). The "processor" in the 370/380 -
> is sram-based, and
> requires another system-processor.

This is not exactly true, during power on, the device
can initialize its SRAM based program memory from a
external serial eeprom.

Murat

--- �ystein_Fallo <oysfal@yahoo.no> wrote:
> Jesper Hansen wrote:
> >Look at he Cypress SL811HS
> >
> >It can easily be interface with and AVR, and it's
> no big deal
> >to make the USB Host interface code on the AVR.
> 
> Be aware that SL811(H)S requires 8bit uC interface,
> eliminating the smaller
> devices. Also be aware of the timing issues related
> to A0<-->ALE if this
> operation-mode is selected (se SL811HS datasheet for
> details).
> I started a project with this setup, but
> unfortunately it's been
> de-prioritized, and so far I have nothing more than
> a draft schematic, and
> thoughts on the firmware :(
> 
> Also, if I understand AT43USB370 correctly, this
> chip is merely a interface
> chip, not a uC with embedded usb interface.
> AT43USB380 is an upgrade for OTG
> and som other new features, like 8/16/32 bits
> host-interface (-370 supports
> 32bits host only). The "processor" in the 370/380 -
> is sram-based, and
> requires another system-processor. The other Atmel
> USB-devices are function
> or slave-usb devices only, and OTP based (except for
> the C51-based chips)...
> 
> So, to me it seems the best solution for a 8bit
> Atmel-based MCU-USB-Host
> still includes an external i/f chip, like the
> SL811HS....
> 
> rgds
> �ystein Fallo
> 
> 
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