ATtiny167-ESSZ datasheet(175/282 Pages) ATMEL

175 / 282 page

175

7728D–AVR–07/09

ATtiny87/ATtiny167

• If an error occurs, Tx stops, the corresponding error flag is set and LRXDL will give the

number of transmitted bytes without error,

• If no error occurs, LTXOK is set after the transmission of the CHECKSUM, LTXDL will be

unchanged (and LRXDL = LTXDL).

15.5.7.5

Data Length after Error

Figure 15-11. Tx Response - Error

Note:

Information on response (ex: error on byte) is only available at the end of the serializa-

tion/de-serialization of the byte.

15.5.7.6

Data Length in UART Mode

• The UART mode forces LRXDL and LTXDL to 0 and disables the writing in LINDLR

• Note that after reset, LRXDL and LTXDL are also forced to 0.

15.5.8

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 LINE-

NIR register (see Section 15.5.13 “Interrupts” on page 178).

DATA-0

DATA-1

LCMD2..0=000b

LIN bus

LBUSY

1st Byte

2 nd Byte

3 rd Byte

LERR

LRXDL

LCMD=Tx Response

LTXDL

DATA-2

ERROR

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