atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 213

• Manufacturer Part Number: atmega32c1
• Description: Atmega32m1 Automotive 8-bit Avr Microcontroller With 32k/64k Bytes In-system Programmable Flash
• Manufacturer: ATMEL Corporation

17.5.7
17.5.7.1
17.5.7.2
7647A–AVR–02/08
Data Length
Data Length in LIN 2.1
Data Length in LIN 1.3
Figure 17-8. Handling LBT[5..0]
Section 17.4.6 “LIN Commands” on page 207
the LRXDL[3..0] or LTXDL[3..0] fields of LINDLR register before receiving or transmitting a
response.
In the case of Tx Response the LRXDL[3..0] will be used by the hardware to count the number of
bytes already successfully sent.
In the case of Rx Response the LTXDL[3..0] will be used by the hardware to count the number of
bytes already successfully received.
If an error occurs, this information is useful to the programmer to recover the LIN messages.
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If LTXDL[3..0]=0 only the CHECKSUM will be sent,
If LRXDL[3..0]=0 the first byte received will be interpreted as the CHECKSUM,
If LTXDL[3..0] or LRXDL[3..0] >8, values will be forced to 8 after the command setting and
before sending or receiving of the first byte.
LRXDL and LTXDL fields are both hardware updated before setting LIDOK by decoding the
data length code contained in the received PROTECTED IDENTIFIER (LRXDL = LTXDL).
Via the above mechanism, a length of 0 or >8 is not possible.
=1
Write in LINBTR register
(LINCR bit 4)
LENA ?
Enable re-synch. in LIN mode
LBT[5..0] forced to 0x20
LDISR forced to 0
=0
LDISR
to write
=0
describes how to set or how are automatically set
=1
ATmega32/64/M1/C1
Disable re-synch. in LIN mode
LBT[5..0] = LBT[5..0] to write
LDISR forced to 1
(LBT[5..0]
min
=8)
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