libftdi Archives

Subject: Re: FT245R transfer rates

From: Jan Wilmans <janwilmans@xxxxxxxxx>
To: libftdi@xxxxxxxxxxxxxxxxxxxxxxx
Date: Mon, 22 Feb 2010 15:08:34 +0100
No I mean it can reach 1MBytes/second either direction. 1216KBytes
per second is the theoretical limit but there are some overheads.

the 250kb/s thingy is simple: 1ms frames, 256 byte send buffer on the FT245

4 packets can be send to the FT245 every ms, so 256 bytes per ms.
1000 x 256 = 256000 bytes per seconds, 256000/1024 = 250 Kb/s

But what I think you mean is: data is being read from the FT245 simulatiously, 
so whilest packets arrive, the receive buffer is being read and more then 4 packets (up to 19 is the hardware reads fast enough) can be send in 1 ms?


Jan Wilmans

libftdi - see for details.
To unsubscribe send a mail to libftdi+unsubscribe@xxxxxxxxxxxxxxxxxxxxxxx

Current Thread