The is an Embedded Controller (EC) and I/O controller chip manufactured by Nuvoton Technology Corporation (formerly under the Winbond brand). It is commonly used in laptop motherboards, such as those for Apple MacBook Pro models, to manage system-level tasks. Key Specifications & Features Package Type: QFP-128 (Quad Flat Package with 128 pins).
The WPCE773LA0DG acts as the motherboard's "gatekeeper," managing tasks that do not require the main CPU to be active: Power Management: wpce773la0dg datasheet pdf verified