Fujitsu F2MC-16LX Hardware Manual page 434

Mb90470 series 16-bit microcontroller

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Table of Contents

CHAPTER 21 UART

I Connection between CPUs in master/slave communication

Figure 21.3-10 "Connection between CPUs in master/slave communication" shows the

connection between CPUs in master/slave communication.

Figure 21.3-10 Connection between CPUs in master/slave communication

I Function selection

Table 21.3-5 "Function selection in master/slave communication" lists settings for selecting the

communication method in master/slave communication.

Table 21.3-5 Function selection in master/slave communication

Sending and reception

of addresses

Sending and reception

I Communication procedure of master/slave communication function

Communication is started by the master CPU sending address data. Address data is data for

which the AD bit is "1"; the address is used to select the slave CPU that becomes the

communication destination. Each slave CPU interprets the address data by a program. If the

address data matches the address assigned to the system, communication (transfer of ordinary

data) with the master CPU is established.

Figure 21.3-11 "Procedure for communication using the master/slave communication function"

shows the procedure for communication using the master/slave communication function.

Slave CPU #0

Operation mode

AD = "1" + 8-bit address

AD = "0" + 8-bit address

Slave CPU #0

Asynchronous