mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 426

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

LIN Physical Layer (S12LINPHYV1)
15.1.2
There are four modes the LIN Physical Layer can operate in:
15.1.3
Figure 15-1
transmitter with slope control, a temperature and a current sensor as well as a control block.
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1. Shutdown Mode
2. Normal Mode
3. Receive Only Mode
4. Standby Mode
The LIN Physical Layer is fully disabled. No wake-up functionality is available. The internal
pull-up resistor is replaced by a high ohmic one (330kΩ) to maintain the LIN Bus pin in the
recessive state.
The full functionality is available. Both receiver and transmitter are enabled.
The transmitter is disabled and the receiver is running in full performance mode. When the LIN
Physical Layer has entered this mode due to an over-current condition, it can only exit it once the
condition is gone.
The transmitter of the physical layer is disabled. Like in the Normal and Receive Only Modes, the
internal pull-up resistor can be selected (30kΩ or 330kΩ). The receiver enters a low power mode
and is only able to pass wake-up events to the SCI (Serial Communication Interface).If the LIN Bus
pin is driven with a dominant level longer than t
Layer will send a wake-up pulse to the SCI, which will request a wake-up interrupt (This feature
is only available if the LIN Physical Layer is routed to the SCI).
Modes of Operation
Block Diagram
shows the block diagram of the LIN Physical Layer. The module consists of a receiver, a
MC9S12VR Family Reference Manual,
Preliminary - Subject to Change Without Notice
WUFR
followed by a rising edge, the LIN Physical
Rev. 2.2
Freescale Semiconductor