Stmicroelectronics offers logic devices. Xpander logic family of devices are to help customers overcome the limited number of input/output [i/o] ports in microcontroller and microprocessor based embedded systems. The xpander logic family allows the existing system processor to use a wide range of intelligent functions through a standard and high-speed inter-integrated circuit [fc] serial peripheral interface. These intelligent features include a keypad controller, supporting a maximum of 96 keys, and a pulse-width modulation controller, able to adjust the brightness of the led in addition performing sophisticated brashness patterns.
