MM908E622ACDR2 FREESCALE [Freescale Semiconductor, Inc], MM908E622ACDR2 Datasheet - Page 39

• 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]

Half-Bridge Overvoltage/Undervoltage Protection
undervoltage and overvoltage conditions. This protection is
done by the low and high voltage interrupt circuitry. If one of
this flags (LVIF, HVIF) is set, the outputs are automatically
disabled if the VIS bit in the System Control Register
(SYSCTL) is cleared.
(and the outputs reenabled) by writing a “1” to the LVIF / HVIF
flags in the Interrupt Flag Register (IFR) or by a reset.
Clearing this flag has no effect as long as the high voltage or
low voltage condition is still present.
Half-Bridge Status and Control Register (HBSCTL)
CRM — Current Recirculation Mode bit
PWM.
Reset clears the CRM bit.
HIGH-SIDE OPERATING MODES
System Control Register (SYSCTL) is set.
HSxON bit in the High-Side Output Register (HSOUT) is set.
Analog Integrated Circuit Device Data
Freescale Semiconductor
Reset
Read
Write
PWM
The half-bridge outputs are protected against
The overvoltage and undervoltage status flags are cleared
This read/write bit selects the recirculation mode during
HSxPWM
The High-sides outputs are enabled if the PSON bit in the
Each high-side output is permanently switched on, if the
HSxON
PSON
CRM
Bit7
Register Name and Address: HBSCTL - $03
0
6
0
0
Control
5
0
0
4
0
0
OCF
HB4
3
0
Current
Status
on/off
Limit
OCF
HB3
2
0
OCF
HB2
1
0
over-current protection
Figure 23. HS circuitry
inrush current limiter
HS - Driver
charge pump
HB1
OCF
Bit0
0
PWM
HBxOCF — Half Bridges Overcurrent Flag Bit
on either the LS or the HS FET on HBx has occurred.
[1] to HBxOCF. Writing a logic [0] to HBxOCF has no effect.
Reset clears the HBxOCF bit.
High-Side Drivers
targeted for driving lamps. The high-sides are protected
against overtemperature, overcurrent and overvoltage/
undervoltage.
High-Side Output Register (HSOUT) is set. In this operating
mode the high-side MOSFET is on, if the input PWM signal
(PWM terminal) is high.
MOSFETs depending on the HSONx and PWMHSx bits.
This read/write bit indicates that an overcurrent condition
Clear HBxOCF and enable Half Bridge by writing a logic
The high-side outputs are low resistive high-side switches,
PWM control of the output is enabled, if the HSxPWM bit
The below table shows the behavior of the high-side
1 = recirculation via switched on low-side MOSFET
0 = recirculation via low-side free wheeling diode
1 = overcurrent condition on HBx occurred
0 = no overcurrent condition on HBx
VSUP
HSx
Functional Device Operation
Operational Modes
908E622
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