mc33911 Freescale Semiconductor, Inc, mc33911 Datasheet - Page 30

• Manufacturer Part Number: mc33911
• Description: Mc33911 Lin System Basis Chip With Dc Motor Pre-driver
• Manufacturer: Freescale Semiconductor, Inc

LIN PHYSICAL LAYER
communication in automotive applications. The LIN physical
layer is designed to meet the LIN physical layer specification
and has the following features:
Slew Rate Selection
10.4 and 20kBit/s as well as a fast baud rate for test and
programming. The slew rate can be adapted with the LSR1:0
bits in the LIN Control Register (LINCR). The initial slew rate
is optimized for 20kBit/s.
LIN Pull-up Disable In Stop And Sleep Modes
during low-power mode, the internal pull-up resistor on the
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33911
FUNCTIONAL DEVICE OPERATIONS
OPERATIONAL MODES
The LIN bus pin provides a physical layer for single-wire
• LIN physical layer 2.0 compliant
• Slew rate selection
• Over-current shutdown
• Over-temperature shutdown
• LIN pull-up disable in Stop and Sleep Modes
• Advanced diagnostics
The slew rate can be selected for optimized operation at
In case of a LIN bus short to GND or LIN bus leakage
RXSHORT
RXONLY
MOD1:2
TXDOM
LSR0:1
RXD
LINOC
TXD
LINPE
LINOT
LDVS
Over-temperature Shutdown (interrupt maskable)
Over-current Shutdown (interrupt maskable)
High-voltage
Shutdown
WAKE-UP
Slope and Slew Rate Control
FILTER
Figure 19. LIN Interface
LIN – DRIVER
INTERRUPT
CONTROL
MODULE
High Side
Interrupt
SLOPE
CONTROL
RECEIVER
and thermal shutdown. An internal pull-up resistor with a
serial diode structure is integrated, so no external pull-up
components are required for the application in a slave node.
The fall time from dominant to recessive and the rise time
from recessive to dominant is controlled. The symmetry
between both slopes is guaranteed.
LIN Pin
external disturbance, guaranteeing communication.
LIN pin can be disconnected by clearing the LINPE bit in the
Mode Control Register (MCR). The bit LINPE also changes
the Bus wake-up threshold (
and SLEEP Modes. It also improves performance and safe
operation.
Current Limit (LIN Interrupt)
conditions. If an over-current condition occurs (e.g. LIN bus
• LIN dominant voltage level selection
The LIN driver is a low side MOSFET with over-current
The LIN pin offers a high susceptibility immunity level from
This feature will reduce the current consumption in STOP
The output low side FET is protected against over-current
LIN
Wake-up
WAKE-UP
MODULE
LGND
VS1
Analog Integrated Circuit Device Data
30K
V
BUSWU
Freescale Semiconductor
).
LIN