Master/Slave Mode Communication Function (Multiprocessor Mode) - Fujitsu 8FX Hardware Manual

MB95630H Series
14.6.6 Master/Slave Mode Communication Function
(Multiprocessor Mode)
Operating mode 1 allows communication among multiple CPUs connected in
master/slave mode. The LIN-UART can be used as a master or a slave.
■ Master/Slave Mode Communication Function
To operate the LIN-UART in multiprocessor mode (operating mode 1), the settings shown in
Figure 14.6-13 are required.
Figure 14.6-13 Settings of LIN-UART Operating Mode 1
bit15 bit14 bit13 bit12 bit11 bit10 bit9
SCR, SMR PEN P
Mode 1 + ×
SSR,
PE ORE FRE RDRF TDRE BDS RIE
RDR/TDR
Mode 1 ×
ESCR, ECCR LBIE LBD LBL1 LBL0 SOPE SIOP CCO SCES
Mode 1 × ×
: Bit to be used
× : Unused bit
1 : Set to "1"
0 : Set to "0"
+ : Bit correctly set automatically
● Inter-CPU connection
For master/slave mode communication, a communication system consists of two common
communication lines connecting between one master CPU and multiple slave CPUs as shown
in Figure 14.6-14. The LIN-UART can be used as a master or a slave.
Figure 14.6-14 Connection Example of LIN-UART Master/Slave Mode Communication
SOT
SIN
Master CPU
● Function selection
In master/slave mode communication, select the operating mode and the data transfer method
as shown in Figure 14.6-14.
MN702-00009-2v0-E
SBL CL AD CRE RXE TXE MD1 MD0 OTO EXT REST UPCL SCKE SOE
0
× ×
SOT SIN
Slave CPU #0
FUJITSU SEMICONDUCTOR LIMITED
14.6 Operations of LIN-UART and LIN-UART
bit8 bit7 bit6 bit5
0 1 0
Set compare data (during writing)
TIE
Retain receive data (during reading)
LBR MS SCDE SSM
Reserved
0 0 0 × ×
SOT SIN
Slave CPU #1
CHAPTER 14 LIN-UART
Setting Procedure Example
bit4 bit3 bit2 bit1
0 0
RBI
Reserved
× × 0
bit0
TBI
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