FUJITSU MB91460 SERIES FR60 User Manual
Page 671
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Chapter 32 USART (LIN / FIFO)
7.USART Operation
7.5 Bidirectional Communication Function (Normal Mode)
In operation mode 0 or 2, normal serial bidirectional communication is available. Select operation mode 0 for
asynchronous communication and operation mode 2 for synchronous communication.
■
Bidirectional Communication Function
The settings shown in figure
are required to operate USART in normal mode (operation mode 0 or 2).
Figure 7-8 Settings for USART operation mode 0 and 2
■
Inter-CPU Connection
As shown in figure
, interconnect two CPUs in USART mode 2
Figure 7-9 Connection example of USART mode 2 bidirectional communication
7.6 Master-Slave Communication Function (Multiprocessor Mode)
USART communication with multiple CPUs connected in master-slave mode is available for both master or
slave systems.
bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SCR04,
SMR0
4
PEN
P
SBL
CL
AD
CRE RXE
TXE MD1 MD0 OTO EXT
REST UPCL SCKE SOE
Mode 0
x
0
0
0
x
0
0
0
Mode 2
x
x
0
1
0
0
0
SSR04,
TDR04/RDR04
PE ORE FRE RDRF TDRE BDS RIE
TIE
Set transmission data (during writing)
Retain reception data (during reading)
Mode 0
Mode 2
ESCR04,ECCR
04
LBIE LBD LBL1 LBL0 SOPE SIOP CCO SECS
-
LBR MS SCDE SSM
BIE
RBI
TBI
Mode 0
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Mode 2
x
x
x
x
x
x
x
x
x
x
Bit is used
x Bit is not used
0 / 1 Set bit to 0 / 1
Bit is used if SSM = 1 (Synchronous start-/stop-bit mode)
SOT
SIN
SCK
SOT
SIN
SCK
CPU-1 (Master)
CPU-2 (Slave)
Output
Input