+++
brief = "Symbols with complex functionality may incorporate simple functional diagrams"
+++

For _black box_ symbols with complex functionality (e.g. special function ICs), a simplified diagram of the symbol functionality may be drawn on the symbol. This may be used to provide functional clarity in a schematic.

. Functional drawing must remain _simple_
. Do not add functional drawings for multi-function components (e.g. microcontrollers)

{{< klcimg src="S3.4a" title="Simplified functional drawings may be added" >}}