SCR: Smart Card Reader Controller
Implements an interface and controller for communicating between smart cards and host systems using a variety of standard system interfaces.
The SCR supports the ISO/IEC 7816-3:2006 and EMV 4.3 specifications, which define the electrical signals and transmission protocols for smart cards (also known as integrated circuit cards). It acts as a communication controller, passing data to and from the host system and the smart card. It is fully-featured, and can activate and deactivate cards, perform cold/warm resets, handle ATR response reception, and execute other essential functions.