908E625_07 Datasheet, PDF (21/48 Pages) Freescale Semiconductor, Inc – Integrated Quad Half H-Bridge with Power Supply, Embedded MCU, and LIN Serial Communication

FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
LOGIC COMMANDS AND REGISTERS
INTERRUPT FLAG REGISTER (IFR)
Register Name and Address: IFR - $05
Bits 7
6
5
4
3
2
1
0
Read
OCF 0
0 HPF LINF HTF LVF HVF
Write
Reset 0
0
0
0
0
0
0
0
Hall-Effect Sensor Input Pin Flag Bit (HPF)
This read/write flag is set depending on RUN/STOP
mode.
RUN Mode
An interrupt will be generated when a state change on any
enabled Hall-effect sensor input pin is detected. Clear HPF
by writing a Logic [1] to HPF. Reset clears the HPF bit.
Writing a Logic [0] to HPF has no effect.
• 1 = State change on the hallflags detected
• 0 = No state change on the hallflags detected
STOP Mode
An interrupt will be generated when AWDCC is set and a
current above the threshold is detected on any enabled Hall-
effect sensor input pin. Clear HPF by writing a Logic [1] to
HPF. Reset clears the HPF bit. Writing a Logic [0] to HPF has
no effect.
• 1 = One or more of the selected Hall-effect sensor input
pins had been pulled HIGH
• 0 = None of the selected Hall-effect sensor input pins
has been pulled HIGH
LIN Flag Bit (LINF)
This read/write flag is set on the falling edge at the LIN
data line. Clear LINF by writing a Logic [1] to LINF. Reset
clears the LINF bit. Writing a Logic [0] to LINF has no effect.
• 1 = Falling edge on LIN data line has occurred
• 0 = Falling edge on LIN data line has not occurred since
last clear
High-Temperature Flag Bit (HTF)
This read/write flag is set on a high-temperature condition.
Clear HTF by writing a Logic [1] to HTF. If a high-temperature
condition is still present while writing a Logic [1] to HTF, the
writing has no effect. Therefore, a high-temperature interrupt
cannot be lost due to inadvertent clearing of HTF. Reset
clears the HTF bit. Writing a Logic [0] to HTF has no effect.
• 1 = High-temperature condition has occurred
• 0 = High-temperature condition has not occurred
Low-Voltage Flag Bit (LVF)
This read/write flag is set on a low-voltage condition. Clear
LVF by writing a Logic [1] to LVF. If a low-voltage condition is
still present while writing a Logic [1] to LVF, the writing has no
effect. Therefore, a low-voltage interrupt cannot be lost due
to inadvertent clearing of LVF. Reset clears the LVF bit.
Writing a Logic [0] to LVF has no effect.
• 1 = Low-voltage condition has occurred
• 0 = Low-voltage condition has not occurred
High-Voltage Flag Bit (HVF)
This read/write flag is set on a high-voltage condition.
Clear HVF by writing a Logic [1] to HVF. If high-voltage
condition is still present while writing a Logic [1] to HVF, the
writing has no effect. Therefore, a high-voltage interrupt
cannot be lost due to inadvertent clearing of HVF. Reset
clears the HVF bit. Writing a Logic [0] to HVF has no effect.
• 1 = High-voltage condition has occurred
• 0 = High-voltage condition has not occurred
Overcurrent Flag Bit (OCF)
This read-only flag is set on an overcurrent condition.
Reset clears the OCF bit. To clear this flag, write a Logic [1]
to the appropriate overcurrent flag in the SYSSTAT Register.
See Figure 10,illustrating the three signals triggering the
OCF.
• 1 = High-current condition has occurred
• 0 = High-current condition has not occurred
HVDD_OCF
HS_OCF
OCF
HB_OCF
Figure 10. Principal Implementation for OCF
Analog Integrated Circuit Device Data
Freescale Semiconductor
908E625
21