Alex <[email protected]> wrote:

> I have started using Xilinx Spartan3E 1600E Microblaze Development
> Board and want to use its RS232 facility in my project. This board has
> two RS232 connectors but I cannot figure out what UART it uses. I was
> searching for UART chip on the board (I was actually searching for a
> MAXIM chip) and have seen none.

The data sheet for the MAXIM MAX3232, MAX3222-MAX3241.PDF
gives much detail including a picture of the die of the MAX3222.
I believe it includes some fairly large (for modern digital IC)
transistors. The total transistor count is 339. Download
from maxim-ic.com

-- glen