General Description
The WPCN381U, a member of the Winbond LPC SuperI/O family, is targeted for legacy-reduced ultra-light portable applications. The WPCN381U is PC2001 and ACPI compliant, and features a Fast Infrared port (FIR, IrDA 1.1 compliant), two Serial Ports and General-Purpose Input/Output (GPIO) support for a total of 11 ports.
The WPCN381U is a “no-frills” solution for the new generation of notebook systems, providing just the essential functions.

Outstanding Features
■ Pin and software compatible with the Winbond 87381
■ Fast Infrared Port (FIR)
■ Two Serial Ports
■ LPC bus interface, based on Intel’s LPC Interface
   Specification Revision 1.1, August 2002 (supports CLKRUN and LPCPD signals)
■ PC2001 and ACPI Revision 3.0 compliant
■ 11 GPIO ports, including 6 with IRQ assertion capability
■ Two testability modes (XOR Tree and TRI-STATE® device pins).
■ 5V tolerant and back-drive protected pins (except LPC bus pins)
■ 48-pin LQFP package