CHAPTER 17 SERIAL INTERFACE CHANNEL 0 (μPD78078 SUBSERIES)337(c) AddressAn address is 8-bit data which the master device outputs to the slave device connected to the bus linein order to select a particular slave device.Figure 17-14. Addresses8-bit data following bus release and command signals is defined as an “address”. In the slave device,this condition is detected by hardware and whether or not 8-bit data matches the own specificationnumber (slave address) is checked by hardware. If the 8-bit data matches the slave address, the slavedevice has been selected. After that, communication with the master device continues until a releaseinstruction is received from the master device.Figure 17-15. Slave Selection with AddressSCK0A7 A6 A5 A4 A3 A2 A1 A01 2 3 4 5 6 7 8SB0 (SB1)AddressCommand SignalBus ReleaseSignalMaster Slave 1 Non-SelectionSlave 2 SelectionSlave 3 Non-SelectionSlave 4 Non-SelectionSlave 2Address Transmission
