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CHAPTER 20 LIN-UART
20.7.5 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 20.7-10 are required to operate LIN-UART in normal mode (operation mode
0 or 2).
Figure 20.7-10 Settings for LIN-UART Operation Mode 0 and 2
●
Inter-CPU connection
As shown in Figure 20.7-11 , interconnect two CPUs in LIN-UART mode 2
Figure 20.7-11 Connection Example of LIN-UART Mode 2 Bidirectional Communication
LBL1
bit 15 bit 14 bit 13 bit 12 bit 11 bit 10 bit 9 bit 8 bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0
PEN P SBL CL AD CRE RXE TXE MD1 MD0 OTO EXT
REST UPCLSCKE
SOE
TDRE
PE ORE FRE
RDRF
BDS RIE TIE
Set conversion data (during writing)
Retain reception data (during reading)
LBIE
LBD
LBL1 LBL0 SOPE SIOP
CCO
SCES
LBR
SCDE
MS SSM RBI TBI
SCRn, SMRn
SSRn, TDRn/RDRn
ESCRn, ECCRn
Mode 0
Mode 2
Mode 0
Mode 2
Mode 0
Mode 2
: Used bit
: Unused bit
: Set 1
: Set 0
: Bit used if SSM = 1 (Synchronous start-/stop-bit mode)
: Bit automatically set to correct value
n = 0, 1
SOT
SIN
SCK
SOT
SIN
SCK
Output
Input
CPU-1 (Master)
CPU-2 (Slave)