atmega32c1 ATMEL Corporation, atmega32c1 Datasheet - Page 216

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

17.5.10
17.5.11
216
ATmega32/64/M1/C1
Frame Time Out
Break-in-data
BREAK
Field
•
•
•
•
•
After each LIN error, the LIN controller stops its previous activity and returns to its withdrawal
mode (LCMD[2..0] = 000
Writing 1 in LERR of LINSIR register resets LERR bit and all the bits of the LINERR register.
According to the LIN protocol, a frame time-out error is flagged if: T
feature is implemented in the LIN/UART controller.
Figure 17-12. LIN timing and frame time-out
According to the LIN protocol, the LIN/UART controller can detect the BREAK/SYNC field
sequence even if the break is partially superimposed with a byte of the response. When a
ever, the LIN slave application has to solve this as:
- known identifier (parity bits corrupted),
- or corrupted identifier to be ignored,
- or new identifier.
LSERR = LIN Synchronization ERRor.
A LIN synchronization error will be flagged if a slave detects the edges of the SYNCH field
outside the given tolerance.
LFERR = LIN Framing ERRor.
A framing error will be flagged if dominant STOP bit is sampled.
Same function in UART mode.
LTOERR = LIN Time Out ERRor.
A time-out error will be flagged if the MESSAGE frame is not fully completed within the max-
imum length T
FIER fields (see
LOVERR = LIN OVerrun ERRor.
Overrun error will be flagged if a new command (other than LIN Abort) is entered while ‘Busy
signal’ is present.
In UART mode, an overrun error will be flagged if a received byte overwrites the byte stored
in the serial input buffer.
LABORT
LIN abort transfer reflects a previous LIN Abort command (LCMD[2..0] = 000) while ‘Busy
signal’ is present.
SYNC
Field
Frame_Maximum
PROTECTED
IDENTIFIER
Section 17.5.10 “Frame Time Out” on page
b
) as illustrated in
Field
Nominal
by any slave task upon transmission of the SYNCH and IDENTI-
DATA-0
Figure 17-11 on page
Field
DATA-n
216).
215.
Frame
Field
> T
Maximun
Frame_Maximum
CHECKSUM
before Time-out
7647A–AVR–02/08
Field
. This