MC33910G5AC/MC3433910G5AC
FUNCTIONAL DEVICE OPERATIONS
OPERATIONAL MODES
required for the application in a slave node. The fall time from
LIN Pin
dominant to recessive and the rise time from recessive to
dominant is controlled. The symmetry between both slopes is
guaranteed.
The LIN pin offers a high susceptibility immunity level from
external disturbance, guaranteeing communication during
external disturbance.
WAKE-UP
MODULE
LIN
Wake-up
MOD1:2
LSR0:1
VS1
LIN DRIVER
J2602
RXONLY
RXSHORT
TXDOM
LINOT
Slope and Slew Rate Control
Over-temperature Shutdown (interrupt maskable)
30 K
LIN
TXD
RXD
SLOPE
CONTROL
LGND
WAKE-UP
FILTER
RECEIVER
Figure 18. LIN Interface
Slew Rate Selection
VSUP down to 4.6 V (typical value) and then the
communication is interrupted.
The slew rate can be selected for optimized operation at
10.4 and 20 kBit/s as well as a fast baud rate for test and
programming. The slew rate can be adapted with the bits
LSR1:0 in the LIN Control Register (LINCR). The initial slew
rate is optimized for 20 kBit/s.
The (DIS_J2602) bit is set per default to 0.
Over-temperature Shutdown (LIN Interrupt)
The output low side FET is protected against over-
temperature conditions. In case of an over-temperature
condition, the transmitter will be shut down and the LINOT bit
in the LIN Status Register (LINSR) is set.
J2602 Conformance
To be compliant with the SAE J2602-2 specification, the
J2602 feature has to be enabled in the LINCR Register (bit
DIS_J2602 sets to 0). The LIN transmitter is disabled in case
of a VSUP under-voltage condition occurs and TXD is in
Recessive State: the LIN bus goes in Recessive State and
RXD goes high. The LIN transmitter is not disabled if TXD is
in Dominant State. A deglitcher on VSUP (tJ2602_DEG) is
implemented to avoid false switching.
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 and TXD is high.
RXD Short-circuit Detection (LIN Interrupt)
The LIN transceiver has a short-circuit detection for the
RXD output pin. If the device transmits and in case of a short-
circuit condition, either 5.0 V or Ground, the RXSHORT bit in
If the (DIS_J2602) bit is set to 1, the J2602 feature is
disabled and the communication TXD-LIN-RXD works for
33910
Analog Integrated Circuit Device Data
Freescale Semiconductor
35
FREESCALE [ Freescale ]
