MM908E622ACDR2 FREESCALE [Freescale Semiconductor, Inc], MM908E622ACDR2 Datasheet - Page 34

• Manufacturer Part Number: MM908E622ACDR2
• Description: Integrated Quad Half-Bridge, Triple High-Side and EC Glass Driver with Embedded MCU and LIN for High End Mirror
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Hall-Effect Sensor Input Terminal H0
input (H0MS = 0) or as hall-effect sensor input (H0MS = 1) to
be able to read 3pin / 2pin hall sensors or switches.
Current Coded Hallsensor Input
corresponding H0MS bit in the H0/L0 Status and Control
Register (HLSCTL) is set. In this mode the terminal current to
GND is monitored by a special sense circuitry. Setting bit
H0EN in the H0/L0 Status and Control Register switches the
output to VSUP and enable the sense circuitry. The result of
the sense operation is given by the H0F flag. The flag is low
if the sensed current is higher than the sense current
threshold I
protected (current limitation) against short circuit to GND.
34
908E622
Functional Device Operation
Operational Modes
The H0 terminal can be configured as general purpose
H0 is selected as “2 pin hallsensor input”, if the
HSCT
. In this configuration the HO terminal is
H0F
Figure 18. General purpose / hall-effect sensor input (H0)
H0EN
H0MS
H0PD
H0EN
10k
needs some time to stabilize the output. In RUN mode the
software has to take care about waiting for a few µs (40)
before sensing the hallflags.
overcurrent (short to GND) the hallport overcurrent flag
(H0OCF) is set and the current is limited. For proper
operation of the current limitation an external capacitor
(>100nF) close to the H0 terminal is required.
Current
Sense
After switching on the hallport (H0EN = “1”) the hallsensor
The hallport output current is sensed. In case of an
VSUP
VDD
H0MS
Analog Integrated Circuit Device Data
Freescale Semiconductor
H0