Fujitsu FR81S Manuel D’Utilisation
CHAPTER 40: MULTI-FUNCTION SERIAL INTERFACE
5. Operation of UART
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : MULTI-FUNCTION SERIAL INTERFACE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
176
Communication Procedure
Communications start when the master CPU transmits address data. Address data refers to data with the D8
bit set to "1" and is used to select a slave CPU as the communication destination. Slave CPUs interpret
address data via a program and the one with a matching address performs communications (normal data)
with the master CPU. Figure 5-23 shows a flowchart of master-slave communications (multi-processor
mode).
MB91520 Series
MN705-00010-1v0-E
1489