mc33912 Freescale Semiconductor, Inc, mc33912 Datasheet - Page 30

• Manufacturer Part Number: mc33912
• Description: Lin System Basis Chip With Dc Motor Pre-driver And Current Sense
• Manufacturer: Freescale Semiconductor, Inc

Open Load Detection
current through the high side is below the open load current
threshold.
and HS2OP in the High Side Status Register (HSSR).
Current Limitation
combination with the over-temperature shutdown the high-
side drivers are protected against over-current and short-
circuit failures.
indicated with the bits HS1CL and HS2CL in the HSSR.
excessive power might be dissipated.
Over-temperature Protection (HS Interrupt)
temperature. In case of an over-temperature condition both
high side drivers are shut down and the event is latched in the
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33912
FUNCTIONAL DEVICE OPERATIONS
OPERATIONAL MODES
Each high side driver signals an open load condition if the
The open load condition is indicated with the bits HS1OP
Each high side driver has an output current limitation. In
When the driver operates in the current limitation area, it is
Note: If the driver is operating in current limitation mode,
Both high side drivers are protected against over-
MOD1:2
HSxOP
HSxCL
HVSE
HSx
Interrupt
Wakeup
Module
Module
Control
Control
Status
on/off
Figure 17. High Side Drivers HS1 and HS2
overtemperture shutdown (interrupt maskable)
high voltage shutdown (maskable)
High Side - Driver
open load detection
current limitation
charge pump
Interrupt Control Module. The shutdown is indicated as HS
Interrupt in the Interrupt Source Register (ISR).
setting all HSxOP and HSxCL bits simultaneously.
then an interrupt (IRQ) is generated.
the over-temperature condition is gone, will re-enable the
high side drivers.
High-voltage Shutdown
shutdown is enabled (bit HVSE in the Mode Control Register
(MCR) is set) both high side drivers are shut down.
the high voltage condition is gone, will re-enable the high side
drivers.
Sleep And Stop Mode
and Stop Mode for cyclic sensing. Also see
Operating Modes
A thermal shutdown of the high side drivers is indicated by
If the bit HSM is set in the Interrupt Mask Register (IMR),
A write to the High Side Control Register (HSCR), when
In case of a high voltage condition and if the high voltage
A write to the High Side Control Register (HSCR), when
The high side drivers can be enabled to operate in Sleep
PWMHSx
Overview.
V
DD
Analog Integrated Circuit Device Data
Freescale Semiconductor
VS2
V
DD
Table 5,
PWMIN
HSx