The System Management Bus (SMBus) is a two-wire interface that provides a simple and efficient method of communication with the rest of the system. It is compatible with I2C bus protocol and is often found in monitoring power conditions, temperature, and other sensors on a board.
SMBus Mailbox is a SMBus slave, which is designed to communicate with SMBus host mailbox. It responds to the standard SMBus Write Byte and Read Byte format messages.
Master Controller supports multi-master on one bus simultaneously - All the masters obey fairness arbitration rules to avoid any bus conflicts.
SMBus bus protocols support many kinds of formats - such as SMBus write byte, SMBus write word, SMBus read byte, SMBus read word, SMBus write block, and SMBus read block.