mc33912 Freescale Semiconductor, Inc, mc33912 Datasheet - Page 42

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

Interrupt Mask Register - IMR
sources. The respective flags within the Interrupt Source
Register (ISR) will continue to work but will not generate
interrupts to the MCU. The 5V Regulator over-temperature
prewarning interrupt and Under-Voltage (VSUV) interrupts
can not be masked and will always cause an interrupt.
HSM - High Side Interrupt Mask
the high side block.
LSM - Low Side Interrupt Mask
the low side block.
Table 30. Interrupt Sources
42
33912
FUNCTIONAL DEVICE OPERATIONS
LOGIC COMMANDS AND REGISTERS
ISR3 ISR2 ISR1 ISR0
This register allows masking of some of the interrupt
Writing to the IMR will return the ISR.
This write-only bit enables/disables interrupts generated in
1 = HS Interrupts Enabled
0 = HS Interrupts Disabled
This write-only bit enables/disables interrupts generated in
1 = LS Interrupts Enabled
0 = LS Interrupts Disabled
0
0
0
0
0
0
0
Table 28. Interrupt Mask Register - $E
Condition
0
0
0
0
1
1
1
Reset
Reset
Value
Write
0
0
1
1
0
0
1
HSM
C3
1
0
1
0
1
0
1
0
LSM
(Low Voltage and VDD over-temperature)
C2
1
POR
Voltage Monitor Interrupt
LINM
C1
1
none maskable
no interrupt
VMM
-
-
-
C0
1
Interrupt Source
LINM - LIN Interrupts Mask
the LIN block.
VMM - Voltage Monitor Interrupt Mask
the Voltage Monitor block. The only maskable interrupt in the
Voltage Monitor Block is the V
Interrupt Source Register - ISR
the last interrupt or wake-up respectively. A read of the
register acknowledges the interrupt and leads IRQ pin to
high, in case there are no other pending interrupts. If there
are pending interrupts, IRQ will be driven high for 10µs and
then be driven low again.
Mask Register (IMR).
ISRx - Interrupt Source Register
Table
sources are handled sequentially multiplex.
LIN Interrupt (RXSHORT, TXDOM, LIN OT, LIN
This write-only bit enables/disables interrupts generated in
1 = LIN Interrupts Enabled
0 = LIN Interrupts Disabled
This write-only bit enables/disables interrupts generated in
1 = Interrupts Enabled
0 = Interrupts Disabled
This register allows the MCU to determine the source of
This register is also returned when writing to the Interrupt
These read-only bits indicate the interrupt source following
In case more than one interrupt is pending, the interrupt
30. If no interrupt is pending then all bits are 0.
Table 29. Interrupt Source Register - $E/$F
HS Interrupt (Over-temperature)
LS Interrupt (Over-temperature)
Read
Lx Wake-up from Stop Mode-
Voltage Monitor Interrupt
OC) or LIN Wake-up
Forced Wake-up
(High Voltage)
no interrupt
maskable
ISR3
S3
Analog Integrated Circuit Device Data
ISR2
S2
SUP
over-voltage interrupt.
Freescale Semiconductor
ISR1
S1
ISR0
S0
Priority
highest
lowest
none