Method to share data between semiconductors chips

A microsecond bus master 20 has chip select outputs CS1, CS2, each connected to more than one slave device IC16. The slaves have configuration pins, which are connected to ground or to a supply voltage. When the master sends a data frame to the slaves on the data bus 10, the chip select signal determines which slaves accept bits from the data frame. The configuration pins determine which bits from the frame each slave accepts. The slave devices may be H-bridge circuits which drive a pair of DC motors, requiring three input bits per motor. In this case, if both configuration pins are connected to ground, the slave device may use the first six bits of the data frame to control the motors. Other settings of the configuration pins allow other blocks of six bits to be used.