Datasheet

21.5.7.5. Data length after error
Figure 21-11. Tx Response - error.
DATA-0 DATA-1
LCMD2..0=000
b
LIN bus
LBUSY
1
st
Byte 2
nd
Byte 3
rd
Byte
LERR
14 0
LRXDL
2
LCMD=Tx Response
LTXDL
4
DATA-2
ERRORERROR
Note: Information on response (ex: error on byte) is only available at the end of the serialization/de-
serialization of the byte.
21.5.7.6. Data length in UART mode
• The UART mode forces LRXDL and LTXDL to 0 and disables the writing in LINDLR register
• Note that after reset, LRXDL and LTXDL are also forced to 0
21.5.8. xxOK flags
There are three xxOK flags in LINSIR register:
• LIDOK: LIN IDentifier OK
It is set at the end of the header, either by the Tx Header function or by the Rx Header. In LIN 1.3,
before generating LIDOK, the controller updates the LRXDL & LTXDL fields in LINDLR register.
It is not driven in UART mode.
• LRXOK: LIN RX response complete
It is set at the end of the response by the Rx Response function in LIN mode and once a character
is received in UART mode.
• LTXOK: LIN TX response complete
It is set at the end of the response by the Tx Response function in LIN mode and once a character
has been sent in UART mode.
These flags can generate interrupts if the corresponding enable interrupt bit is set in the LINENIR register
(see Interrupts).
21.5.9. xxERR flags
LERR bit of the LINSIR register is an logical ‘OR’ of all the bits of LINERR register (see Interrupts). There
are eight flags:
• LBERR = LIN Bit ERRor
. A unit that is sending a bit on the bus also monitors the bus. A LIN bit error will be flagged when
the bit value that is monitored is different from the bit value that is sent. After detection of a LIN bit
error the transmission is aborted.
• LCERR = LIN Checksum ERRor. A LIN checksum error will be flagged if the inverted modulo-256
sum of all received data bytes (and the protected identifier in LIN 2.1) added to the checksum does
not result in 0xFF.
• LPERR = LIN Parity ERRor (identifier). A LIN parity error in the IDENTIFIER field will be flagged if
the value of the parity bits does not match with the identifier value. (See LP[1:0] bits in LINIDR. A
LIN slave application does not distinguish between corrupted parity bits and a corrupted identifier.
Atmel ATmega16M1/32M1/64M1 [DATASHEET]
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