attiny167-esxz ATMEL Corporation, attiny167-esxz Datasheet - Page 171
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attiny167-esxz
Manufacturer Part Number
attiny167-esxz
Description
8-bit Avr 8-bit Microcontroller Microcontroller With 16k Bytes In-system Programmable Flash And Lin Controller
Manufacturer
ATMEL Corporation
Datasheet
1.ATTINY167-ESXZ.pdf
(277 pages)
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15.5.14
15.5.15
15.5.15.1
7728A–AUTO–07/08
Message Filtering
Data Management
LIN FIFO Data Buffer
Figure 15-13. LIN Interrupt Mapping
Message filtering based upon the whole identifier is not implemented. Only a status for frame
headers having 0x3C, 0x3D, 0x3E and 0x3F as identifier is available in the LINSIR register.
The LIN protocol says that a message with an identifier from 60 (0x3C) up to 63 (0x3F) uses a
classic checksum (sum over the data bytes only). Software will be responsible for switching cor-
rectly the LIN13 bit to provide/check this expected checksum (the insertion of the ID field in the
computation of the CRC is set - or not - just after entering the Rx or Tx Response command).
To preserve register allocation, the LIN data buffer is seen as a FIFO (with address pointer
accessible). This FIFO is accessed via the LINDX[2..0] field of LINSEL register through the
LINDAT register.
LINDX[2..0], the data index, is the address pointer to the required data byte. The data byte can
be read or written. The data index is automatically incremented after each LINDAT access if the
LAINC (active low) bit is cleared. A roll-over is implemented, after data index=7 it is data
index=0. Otherwise, if LAINC bit is set, the data index needs to be written (updated) before each
LINDAT access.
The first byte of a LIN frame is stored at the data index=0, the second one at the data index=1,
and so on. Nevertheless, LINSEL must be initialized by the user before use.
LINERR.7
LINERR.6
LINERR.5
LINERR.4
LINERR.3
LINERR.2
LINERR.1
LINERR.0
LABORT
LOVERR
LTOERR
LSERR
LPERR
LCERR
LBERR
LFERR
Table 15-4.
LIDST[2..0]
LINSIR.3
LINSIR.2
LINSIR.1
LINSIR.0
100
101
110
0xx
111
Frame Status
b
b
b
b
b
LRXOK
LTXOK
LIDOK
LERR
LENERR
LINENIR.3
No specific identifier
LENIDOK
60 (0x3C) identifier
61 (0x3D) identifier
62 (0x3E) identifier
63 (0x3F) identifier
LINENIR.2
Frame Status
LENTXOK
LINENIR.1
LENRXOK
LINENIR.0
ATtiny167
LIN ERR
LIN TC
171
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