What MAXIM chip is used on Spartan 3E 1600E Microblaze Board for ??RS232 communication?
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From: glen herrmannsfeldt on 2 Feb 2010 07:04 Alex <victous(a)gmail.com> wrote: > On 2 ???, 09:14, glen herrmannsfeldt <g...(a)ugcs.caltech.edu> wrote: >> Alex <vict...(a)gmail.com> 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. >> It would be unusual to put a UART on an FPGA development board. >> You should implement one in the FPGA logic. > I also had this thought until had noticed that MAXIM UART device is > mentioned on page 61 of ug257: It is just a level converter. The MAXIM MAX3232 device is popular as it needs only +3.3V power, not the +/-12V used by most RS232 level converters. The MAX232 I used to know uses +5V, it seems that there is now a 3.3V version. The capacitors are used to generate the required voltages. -- glen |