908E621_08 Datasheet, PDF (22/65 Pages) Freescale Semiconductor, Inc – Integrated Quad Half-bridge and Triple High Side with Embedded MCU and LIN for High End Mirror

FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
EXTERNAL RESET PIN (RST)
A logic [0] on the RST pin forces the MCU to a known
startup state. RST is bidirectional, allowing a reset of the
entire system. It is driven LOW when any internal reset
source is asserted.
This pin contains an internal pullup resistor that is always
activated, even when the reset pin is pulled LOW.
For details refer to the 68HC908EY16 datasheet.
POWER SUPPLY PINS (VSUP1:VSUP8)
VSUP1:VSUP8 are device power supply pins. The
nominal input voltage is designed for operation from 12V
systems. Owing to the low ON-resistance and current
requirements of the half-bridge driver outputs and high side
output drivers, multiple VSUP pins are provided.
All VSUP pins must be connected to get full chip
functionality.
POWER GROUND PINS (GND1:GND4)
GND1:GND4 are device power ground connections.
Owing to the low ON-resistance and current requirements of
the half-bridge driver outputs and high side output drivers,
multiple pins are provided.
GND1 and GND2 pins must be connected to get full chip
functionality.
HALF-BRIDGE OUTPUT PINS (HB1:HB4)
The 908E621 device includes power MOSFETs
configured as four half-bridge driver outputs. The HB3:HB4
have a lower R_DS(ON), to run higher currents (e.g. fold motor),
than the HB1:B2 outputs.
The HB1:HB4 outputs are short-circuit and over-
temperature protected, and they feature current recopy.
Over-current protection is done on both high side and low
side FET’s. The current recopy are done on the low side
MOSFETs.
HIGH SIDE OUTPUT PINS (HS1:HS3)
The HS output pins are a low R_DS(ON) high side switches.
Each HS switch is protected against over-temperature and
over-current. The output is capable of limiting the inrush
current with an automatic PWM or feature a real PWM
capability using the PWM input.
The HS1 has a lower R_DS(ON), to run higher currents (e.g.
heater), than the HS2 and HS3 outputs.
For the HS1 two pins (HS1a:HS1b) are necessary for the
current capability and have to be connected externally.
Important: The HS3 can be only used to drive resistive
loads.
908E621
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HALL-EFFECT SENSOR INPUT PIN (H0)
The Hall-effect sensor input pin H0 provides an input for
Hall-effect sensors (2pin or 3pin) or a switch.
ANALOG INPUT PINS (A0, A0CST)
These pins are analog inputs with selectable current
source values. The A0CST intent is to trim the A0 input.
WAKE-UP INPUT PIN (L0)
This pin is 40V rated input. It can be used as wake-up
source for a system wake-up. The input is falling or rising
edge sensitive.
Important: If unused this pin should be connected to
VSUP or GND to avoid parasitic transitions. In Low Power
mode this could lead to random wake-up events.
SWITCHABLE V_DD OUTPUT PIN (HVDD)
The HVDD pin is a switchable V_DD output for driving
resistive loads requiring a regulated 5.0V supply (e.g., 3-pin
Hall-effect sensors or potentiometers). The output is short-
circuit protected.
LIN BUS PIN (LIN)
The LIN pin represents the single wire bus transmitter and
receiver. It is suited for automotive bus systems and is based
on the LIN bus specification.
+5.0V VOLTAGE REGULATOR OUTPUT PIN (VDD)
The VDD pin is needed to place an external capacitor to
stabilize the regulated output voltage. The VDD pin is
intended to supply the embedded microcontroller.
Important: The VDD pin should not be used to supply
other loads; use the HVDD pin for this purpose. The VDD,
EVDD and VDDA/VREFH pins must be connected together.
VOLTAGE REGULATOR GROUND PIN (VSS)
The VSS pin is the ground pin for the connection of all non-
power ground connections (microcontroller and sensors).
Important: VSS, EVSS and VSSA/VREFL pins must be
connected together.
RESET PIN (RST_A)
RST_A is the bidirectional reset pin of the analog die. It is
an open drain with pullup resistor and must be connected to
the RST pin of the MCU.
INTERRUPT PIN (IRQ_A)
IRQ_A is the interrupt output pin of the analog die
indicating errors or wake-up events. It is an open drain with
pullup resistor and must be connected to the IRQ pin of the
MCU.
Analog Integrated Circuit Device Data
Freescale Semiconductor