Re: DMA in UART .

Sikandar wrote:
HI,

I am using 16550 compatible UART. While this UART supports max speed of
about 11.5 Kbps which is connected to a V92 dialup modem supporting
speeds upto 64Kbps .

I want to know the logic behind using DMA inside the UART for
transmission to the FIFOs
Is this really required for such low speeds .


Regards in anticipation of replies,
Sikandar

Something in your post makes no sense: A 16550 UART supports well above
11.5 kb/s. Do you mean 115kb/s?

This depends on manufacturer and the clock used - I have devices rated
at 1Mb/s (both commercially and embedded in FPGAs)

Cheers

PeteS

.

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