UPD78F1502AGK-GAK-AX Datasheet, PDF (557/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 14 SERIAL ARRAY UNIT
LIN Bus
TXD3
(output)
Figure 14-82. Transmission Operation of LIN
Wakeup signal
frame
Sync break
field
Sync field Identification Data field Data field Checksum
field
field
8 bits^{Note 1}
13-bit SBF
55H
Data
Data
Data
Data
transmission^{Note 2} transmission transmission transmission transmission transmission
INTST3^{Note 3}
Notes 1. The baud rate is set so as to satisfy the standard of the wakeup signal and data of 00H is transmitted.
2. A sync break field is defined to have a width of 13 bits and output a low level. Where the baud rate for main
transfer is N [bps], therefore, the baud rate of the sync break field is calculated as follows.
(Baud rate of sync break field) = 9/13 × N
By transmitting data of 00H at this baud rate, a sync break field is generated.
3. INTST3 is output upon completion of transmission. INTST3 is also output when SBF transmission is
executed.
Remark The interval between fields is controlled by software.
R01UH0004EJ0501 Rev.5.01
541
Jun 20, 2011