MM908E625ACDWB/R2 Motorola, MM908E625ACDWB/R2 Datasheet - Page 27

• Manufacturer Part Number: MM908E625ACDWB/R2
• Description: Integrated Quad Half H-Bridge with Power Supply / Embedded MCU / and LIN Serial Communication
• Manufacturer: Motorola

Interrupts
How and when an interrupt occurs is dependent on the
operating mode, RUN or Stop.
RUN Mode
flag (HPF) will be set if a state change on the hallflags (HxF) is
detected. The interrupt is maskable with the HPIE bit in the
Interrupt Mask Register. Before enabling the interrupt, the flag
should be cleared in order to prevent a wrong interrupt.
STOP Mode
disabled independent of the state of the HxEN flags.
MOTOROLA ANALOG INTEGRATED CIRCUIT DEVICE DATA
The Hall-effect sensor input terminals are interrupt capable.
In RUN mode the Hall-effect sensor input terminal interrupt
In STOP mode the Hall-effect sensor input terminals are
HxEN
HxF
Figure 13. Hall-Effect Sensor Input Terminal Connected to Three-Terminal Hall-Effect Sensor
Freescale Semiconductor, Inc.
Circuitry
Sense
For More Information On This Product,
V
Go to: www.freescale.com
Hx
GND
Cyclic Wake-Up
system. This wake-up function is provided by the cyclic check
wake-up feature of the AWD (autonomous watchdog).
set), the AWD switches on the enabled Hall-effect sensor
terminals periodically. To ensure that the Hall-effect sensor
current is stabilized after switching on, the inputs are sensed
after ~40 µs. If a “1” is detected (I
interrupt mask bit HPIE is set, an interrupt is performed. This
wakes up the MCU and starts the main voltage regulator.
conditions exist:
The Hall-effect sensor inputs can be used to wake up the
If the cyclic check wake-up feature is enabled (AWDCC bit is
The wake-up function via this input is available when all three
• The two-terminal Hall-effect sensor input is enabled
• The cyclic wake-up of the AWD is enabled (AWDCC = 1)
• The Hall-effect sensor input terminal interrupt is enabled
(HxEN = 1).
(see
(HPIE = 1).
GND
Figure
Out
Vs
Three-Terminal Hall-Effect Sensor
14, page 28).
Hall sensor
> I
HSCT
) and the
908E625
27