908E621_08 Datasheet, PDF (33/65 Pages) Freescale Semiconductor, Inc – Integrated Quad Half-bridge and Triple High Side with Embedded MCU and LIN for High End Mirror

Wake-up
LINIF
LINCL
MODE PSON
SRS[1:0]
Control
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
VSUP
10µA
TXD
TESTMODE
Slope
Control
Wake-up
Filter
30k
LIN bus
GND
RXD
Figure 16. LIN Interface
TXD Pin
The TXD pin is the MCU interface to control the state of the
LIN transmitter (see Figure 2, page 2). When TXD is LOW,
the LIN pin is low (dominant state). When TXD is HIGH, the
LIN output MOSFET is turned off (recessive state). The TXD
pin has an internal pullup current source to set the LIN bus to
a recessive state in the event, for instance, if the
microcontroller could not control it during system power-up or
power-down.
RXD Pin
The RXD transceiver pin is the MCU interface, which
reports the state of the LIN bus voltage. LIN HIGH (recessive
state) is reported by a high level on RXD, LIN LOW (dominant
state) by a low level on RXD.
STOP Mode and Wake-up Feature
During STOP mode operation the transmitter of the
physical layer is disabled and the internal pullup resistor is
disconnected from VSUP and a small current source keeps
the LIN pin in recessive state. The receiver is still active and
able to detect wake-up events on the LIN bus line.
If the LIN interrupt is enabled (LINIE bit in the Interrupt
Mask register is set), a dominant level longer than T_PROPWL
followed by an rising edge will set the LINIF flag and generate
an interrupt which causes a system wake-up (see Figure 8,
page 19)
SLEEP Mode and Wake-up Feature
During SLEEP mode operation the transmitter of the
physical layer is disabled, the internal pullup resistor is
disconnected from VSUP, and a small current source keeps
the LIN pin in the recessive state. The receiver is still active
to be able to detect wake-up events on the LIN bus line.
A dominant level longer than T_PROPWL followed by an
rising edge will generate a system wake-up (reset) and set
the LINWF flag in the Reset Status register (RSR). Also see
Figure 9, page 19).
A0 INPUT AND ANALOG MULTIPLEXER
A0 - Analog Input
Input A0 is an analog input used for reading switches, or
as analog inputs for potentiometers, NTC, etc.
A0 is internally connected to the analog multiplexer. This
pin offers a switchable current source. To read the Analog
Input, the pin has to be selected with the SS[3:0] bits in the
A0MUCTL register.
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E621
33