Graham,

Figure 8, Page 17, of the FT245 data sheet has the circuit mod that you
need for the device to go into sleep mode when not connected to the USB.


Regards, Peter Moreton


> -----Original Message-----
> From: pic microcontroller discussion list
> [mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of Graham North
> Sent: 01 September 2003 16:33
> To: PICLIST@MITVMA.MIT.EDU
> Subject: [PIC]:FTDI FT245BM in suspend?
>
>
> Hi,
>
> I have managed to get the FT245BM working in our application,
> but am having power troubles.
>
> The chip is self powered, and when the USB cable is not
> plugged into the board uses ~20mA, is there any way of making
> the device to go into a low power state?
>
> If the USB cable is plugged in slightly (just enough for the
> power pins to connect) then the device goes into a low power state.
>
> If the USB cable is plugged completely in then the device
> uses ~20mA again. I guess this is because the PC is polling
> the device? Is there any way of stopping this?
>
> Cheers
>
> Graham
>
>
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