Re: talking to CTK 571 synthesizer

Previously Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx> wrote:
Allan Adler <ara@xxxxxxxxxxxxxxxxxxxx> writes:

So, now I have data sheets for two UARTs. Assuming one of them to be the
right one for my old machine and old sound card, how do I use the information
contained in it? More precisely, how do I use this information to write
an assembly language program to talk to the chip?

I've had more time to think about it and I think the most likely way
to interpret Arno Wagner's suggestion to look at the data sheets is
that I need them to decide whether the MIDI output line can support
10 mA and, therefore, whether I need to build a breakout box. It isn't
relevant to the question of how to write a program that specifically
talks to the UART.

Actually the data*** is the programming reference for the
UART. It will not help you decide the 10mA Issue. The UART
itself will have some kind of output driver in addition, given
that it is not present as physical chip anyways.

The only data in the data sheets that specifically addresses current
(apart from negligable leakage currents) is that the average power
supply current is is 10 mA. That doesn't address what the individual
output pins can support. The only other clue is that the power
dissipation of the chip you suggested is between 0.8 W and 1.1 W.

You can ignore that.

Arno
.

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