These chips will receive 1 or 2 SGPIO streams and drive LEDs accordingly; the latest chip from AMI, the MG9077, can be configured by pull-up and pull-down resistors to adopt to 16 different configurations of SGPIO buses and drive the LEDs accordingly. Since the availability of these chips from AMI, major OEMs including NEC, Hitachi, Supermicro, IBM, Sun Microsystems, and others are using them on their back-planes to receive the SGPIO streams from a variety of HBA vendors and on-board controller chips to consistently drive LEDs with a pre-determined blinking pattern.