Atmel ATmega32M1 - Page 219

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7647H–AVR–03/12
Atmel ATmega16/32/64/M1/C1
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.
After each LIN error, the LIN controller stops its previous activity and returns to its withdrawal
mode (LCMD[2..0] = 000
b
) as illustrated in Figure 17-11 on page 217.
Writing 1 in LERR of LINSIR register resets LERR bit and all the bits of the LINERR register.
17.5.10 Frame Time Out
According to the LIN protocol, a frame time-out error is flagged if: T
Frame
> T
Frame_Maximum
. This
feature is implemented in the LIN/UART controller.
Figure 17-12. LIN timing and frame time-out
BREAK
Field
SYNC
Field
CHECKSUM
Field
DATA-0
FieldField
IDENTIFIER
PROTECTED
DATA-n
Field
T ResponseT Header
T Frame
T Header_Maximum
T Header_Maximum + T Response_Maximum
1.4 x
T Header_Nominal
1.4 x
T Response_NominalT Response_Maximum
T Frame_Maximum
=
=
=
Maximun before Time-out
T Header_Nominal
T Header_Nominal + T Response_Nominal
34 x
T Bit
10 ( Number_of_Data + 1 ) x
T BitT Response_Nominal
T Frame_Nominal
=
=
=
Nominal