CC1

CC1 is a designation used in multiple domains, and its meaning depends on the context. It is not tied to a single standard or product.

In computing, cc1 refers to the GNU Compiler Collection’s C frontend. This program is invoked by the gcc driver to compile C source code and handles preprocessing, parsing, optimization, and code generation. It is a core component of GCC’s internal architecture and is typically not used directly by most developers, who interact with the higher-level gcc command instead.

In hardware and electronics, CC1 is the configuration channel pin on the USB Type-C connector. Along with CC2, CC1 is used for orientation detection and for negotiating power delivery between devices and cables. The exact behavior depends on the plug orientation and whether the involved components are acting as source or sink; correct operation requires appropriate CC connections and signaling between the USB-C devices.

Other uses of CC1 exist as internal codes, model numbers, or designations in various catalogs and standards. These usages are diverse and not standardized across domains, often differing in capitalization and meaning from one context to another.