How can a seven-segment indicator be depicted on a diagram?

Question

Circuit design

In general, the task is as follows - input of an analog signal into a 580 microprocessor, after which the calculation of the value (rms) and output to a seven-segment display.
Actually, at first there were difficulties, what and how to do, for the first time I work with this, the search for information on the Internet did not bring much success, maybe I'm just looking in the wrong way.
What I found - the following scheme, which seems to be the closest to the task, but there is no output for the indication in it, the question is - how can it be depicted? Thank you!

Perhaps the output to the indication must be carried out through a 55 microcircuit (parallel interface)?

And in addition - what would you advise to read in order to competently complete the task?

Answer 1

If we are talking about a block diagram, as in your picture, then you need to draw one more (or more) cube, write "Indication" on it, and connect a branch of the data bus to it.
If we are talking about a circuit diagram, then there a 7-segment is usually displayed as a diode matrix. The diodes in it are complemented by the symbols of light emission and the letters of the segment designations (in accordance with the generally accepted standard). A hardware driver from the data bus must be added to the matrix, this is either a parallel 8-bit register, or a 580BB55 universal input / output device.

Answer 2

as you connect it to the processor, so draw it.
functional diagram, in principle, is a simplified image of the principal, on which all the "extra" strapping is missing.
There are many options from a set of elementary latches to an indicator with a built-in controller controlled via uart, etc.
this will give its unique pieces to the circuit diagram, and its blocks to the functional one.