201
ATmega16M1/32M1/64M1 [DATASHEET]
8209E–AVR–11/2012
20.5.7.3
Data length in Rx Response
Figure 20-9. LIN2.1 - Rx Response - no error.
The user initializes LRXDL field before setting the Rx Response command
After setting the Rx Response command, LTXDL is reset by hardware
LRXDL field will remain unchanged during Rx (during busy signal)
LTXDL field will count the number of received bytes (during busy signal)
If an error occurs, Rx stops, the corresponding error flag is set and LTXDL will give the number of received bytes
without error
If no error occurs, LRXOK is set after the reception of the CHECKSUM, LRXDL will be unchanged (and
LTXDL = LRXDL)
20.5.7.4
Data length in Tx Response
Figure 20-10. LIN1.3 - Tx Response - no error.
The user initializes LTXDL field before setting the Tx Response command
After setting the Tx Response command, LRXDL is reset by hardware
LTXDL will remain unchanged during Tx (during busy signal)
LRXDL will count the number of transmitted bytes (during busy signal)
If an error occurs, Tx stops, the corresponding error flag is set and LRXDL will give the number of transmitted
bytes without error
If no error occurs, LTXOK is set after the transmission of the CHECKSUM, LTXDL will be unchanged (and
LRXDL = LTXDL)
DATA-0
DATA-1
DATA-2
DATA-3
CHECKSUM
LINDLR=0x?4
LCMD2..0=000b
LIN bus
LRXDL (*)
4
1
?0
LBUSY
LTXDL (*)
234
1st Byte
2 nd Byte
3 rd Byte
4 th Byte
LIDOK
LRXOK
LCMD=Rx Response
(*) : LRXDL & LTXDL updated by user
DATA-0
DATA-1
DATA-2
DATA-3
CHECKSUM
LCMD2..0=000b
LIN bus
LBUSY
1st Byte
2 nd Byte
3 rd Byte
4 th Byte
LIDOK
LTXOK
1
40
LRXDL (*)
234
LCMD=Tx Response
(*) : LRXDL & LTXDL updated by Rx Response or Tx Response task
LTXDL (*)
4