33912 Datasheet, PDF (23/47 Pages) Freescale Semiconductor, Inc – LIN System Basis Chip with DC Motor Pre-driver and Current

FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
VOLTAGE SENSE PIN (VSENSE)
This input can be connected directly to the battery line. It
is protected against battery reverse connection. The voltage
present in this input is scaled down by an internal voltage
divider, and can be routed to the ADOUT0 output pin and
used by the MCU to read the battery voltage.
The ESD structure on this pin allows for excursion up to
+40V and down to -27V, allowing this pin to be connected
directly to the battery line. It is strongly recommended to
connect a 10kohm resistor in series with this pin for protection
purposes.
HALL SENSOR SWITCHABLE SUPPLY PIN (HVDD)
This pin provides a switchable supply for external hall
sensors. While in Normal Mode, this current limited output
can be controlled through the SPI.
The HVDD pin needs to be connected to an external
capacitor to stabilize the regulated output voltage.
+5V MAIN REGULATOR OUTPUT PIN (VDD)
An external capacitor has to be placed on the VDD pin to
stabilize the regulated output voltage. The VDD pin is
intended to supply a microcontroller. The pin is current limited
against shorts to GND and over-temperature protected.
During Stop Mode, the voltage regulator does not operate
with its full drive capabilities and the output current is limited.
During Sleep Mode, the regulator output is completely shut
down.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33912
23