DataSheet_SB16C1053APCI_v106

SB16C1053APCI
PCI Target Controller with 2 Serial, 1 Parallel and MIO Bus
PCI to 2S+1P with MIO Bus Bridge
JULY 2013 REV 1.06
58
Figure 11–6: Multi-Drop System Network
The slave reads all data from bus and compares all data with address itself. If it is equal
to address of slave, the slave accept the data. Then, because the slave doesn’t know
what data from slave is address or data, comparison between data and its own address is
operated to find a packet indicated its own among the data from bus.
Because of this, the processing time is consumed in a lot slave and the performance of
device is reduced. In order to resolve this problem, 9-bit communication is used to
discriminate between address and data. If 9-bit data from master is ‘1’, it means address.
Also, 9-bit data from master is ‘0, it’ means data. The processing time can be reduced
because the address is compared to its own address if 9-bit is ‘1’. If the address is same
to its own address, a slave accepts data. But, it is not same to its own address, a slave
ignores data.