Rainbow-electronics ATmega64M1 Instrukcja Użytkownika Pobierz pdf (Strona 209)

209

8209A–AVR–08/09

ATmega16M1/32M1/64M1

The LIN configuration is independent of the programmed LIN protocol.

The listening mode connects the internal Tx LIN and the internal Rx LIN together. In this mode,

the TXLIN output pin is disabled and the RXLIN input pin is always enabled. The same scheme

is available in UART mode.

Figure 21-6. Listening Mode

21.5.5 Busy Signal

LBUSY bit flag in LINSIR register is the image of the BUSY signal. It is set and cleared by hard-

ware. It signals that the controller is busy with LIN or UART communication.

21.5.5.1 Busy Signal in LIN Mode

Figure 21-7. Busy Signal in LIN Mode

UART

8-bit data, no parity & 1 stop-bit

8-bit data, even parity & 1 stop-bit

8-bit data, odd parity & 1 stop-bit

Listening mode, 8-bit data, no parity & 1 stop-bit

Table 21-3. Configuration Table versus Mode

Mode LCONF[1..0] Configuration

TXLIN

RXLIN

internal

Tx LIN

internal

Rx LIN

LISTEN

BREAK

Field

SYNC

Field

CHECKSUM

Field

DATA-0

FieldField

IDENTIFIER

PROTECTED

DATA-n

Field

RESPONSEHEADER

FRAME SLOT

LIN bus

LIDOK

Node providing the master task

Node providing a slave task

LCMD=Tx Header LTXOK or LRXOKLCMD=Tx or Rx Response

1) LBUSY

3) LBUSY

2) LBUSY

Node providing neither the master task, neither a slave task

1 2 ... 204 205 206 207 208 209 210 211 212 213 214 ... 342 343

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