The W55P241 is a general purpose programmable I/O device usable with many different microprocessors through SPI interface. The W55P241 contains three 8-bit ports (BP0, BP1 and BP2) . There are 24 I/O pins which may be individually programmed for 4 separate command groups. The   W55P241 features logical operating capability AND/OR/XOR for each bit of internal configuration register to speed up access. These I/O pins can drive LED directly with high-current applications. A dedicated counter is in charge of 256-level output functions.