411 REFERENCE · Wikibooks
Embedded Systems/External ICs
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Integrated Circuits (IC) frequently have very similar operating characteristics to microcontrollers. It is often possible to connect different pins directly to each other without resistors to control the current flow, because the ICs will not draw much current.
When an embedded application calls for greater capability, a microcontrollers may be connected to external sensors, memory and other devices through a data bus.
Further reading
Digital Circuits
Semiconductors