33910 datasheet(36/90 Pages) FREESCALE

36 / 90 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33910

FUNCTIONAL DEVICE OPERATIONS

OPERATIONAL MODES

MC33910G5AC/MC3433910G5AC

the LIN Status Register (LINSR) is set and the transmitter is

shut down.

If the LINM bit is set in the Interrupt Mask Register (IMR),

an Interrupt IRQ will be generated.

The transmitter is automatically re-enabled once the

condition is gone (transition on RXD) and TXD is high.

A read of the LIN Status Register (LINSR) without the RXD

pin short-circuit condition will clear the bit RXSHORT.

TXD Dominant Detection (LIN Interrupt)

The LIN transceiver monitors the TXD input pin to detect a

stuck in dominant (0 V) condition. In case of a stuck condition

(TXD pin 0 V for more than 1 second (typ.)), the transmitter is

shut down and the TXDOM bit in the LIN Status Register

(LINSR) is set.

If the LINM bit is set in the IMR, an Interrupt IRQ will be

generated.

The transmitter is automatically re-enabled once TXD is

high.

A read of the LIN Status Register (LINSR) with the TXD pin

at 5.0 V will clear the bit TXDOM.

LIN Receiver Operation Only

While in Normal mode, the activation of the RXONLY bit

disables the LIN TXD driver. In case of a LIN error condition,

this bit is automatically set. If Stop mode is selected with this

bit set, the LIN wake-up functionality is disabled and the RXD

pin will reflect the state of the LIN bus.

STOP Mode And Wake-up Feature

During Stop mode operation, the transmitter of the

physical layer is disabled. The receiver is still active and able

to detect wake-up events on the LIN bus line.

A dominant level longer than TPROPWL followed by a rising

edge will generate a wake-up interrupt, and will be reported

in the Interrupt Source Register (ISR). Also see Figure 11.

SLEEP Mode And Wake-up Feature

During Sleep mode operation, the transmitter of the

physical layer is disabled. The receiver must be active to

detect wake-up events on the LIN bus line.

A dominant level longer than TPROPWL followed by a rising

edge will generate a system wake-up (Reset), and will be

reported in the Interrupt Source Register (ISR). Also see

Figure 10.

33910 Datasheet(PDF) 36 Page - Freescale Semiconductor, Inc

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