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Re: [lpc2000] UART TX FIFO and INTs problem

2004-02-18 by David Willmore

> If anything will have a complete description that should be it.  If I 
> remember correctly the 16550 was a 16450 but with a FIFO that actually 
> worked.  (but I may have my part numbers mixed up).  It's been a long time 
> since I read the datasheet so I don't know how complete it is.

OT trivia:
The 16450 was the simple UART (8250).  The 16550 had buffers, but there
were bugs that made them unusable.  The 16550A was the fixed version.
An 16C550 should be fixed, as well.  (back when C really meant something
different from no character--which generally meant NMOS)

So, NMOS 16550 bad. NMOS 16550A good.  CMOS 16C550 good.

But, this is only as accurate as my failing memory.

Cheers,
David

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