MC34911BACR2 Freescale, MC34911BACR2 Datasheet - Page 29

• Manufacturer Part Number: MC34911BACR2
• Manufacturer: Freescale

Specifications of MC34911BACR2

• Turn Off Delay Time: 10us
• Number Of Drivers: 2
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Compliant

INTERRUPTS
peripheral needs to be serviced. The interrupts which can be
generated, change according to the operating mode. While in
Normal and Normal Request modes, the 33911 signals
through interrupts special conditions which may require a
MCU software action. Interrupts are not generated until all
pending wake-up sources are read in the Interrupt Source
Register (ISR).
events. Sleep mode does not use interrupts. Wake-up is
performed by powering-up the MCU. In Normal and Normal
Request mode the wake-up source can be read by SPI.
of the IRQ pin, which will remain low until the interrupt is
acknowledged by a SPI read command of the ISR register.
The IRQ pin will then be driven high.
Request and Stop mode. Interrupts are not generated while
the RST pin is low.
Normal Request modes. Some of these can be masked by
writing to the SPI - Interrupt Mask Register (IMR).
Analog Integrated Circuit Device Data
Freescale Semiconductor
Interrupts are used to signal a microcontroller that a
While in Stop mode, interrupts are used to signal wake-up
The interrupts are signaled to the MCU by a low logic level
Interrupts are only asserted while in Normal, Normal
The following is a list of the interrupt sources in Normal and
Table 6. Operating Modes Overview
Voltage Monitoring
Notes
60.
61.
62.
63.
Analog Mux
Watchdog
Function
VDD
HS1
LSx
Operation can be controlled by the PWMIN input.
HS1 switch can be configured for cyclic sense operation in Stop mode.
HS1 switch can be configured for cyclic sense operation in Sleep mode.
Windowing operation when enabled by an external resistor.
LIN
Lx
Reset Mode Normal Request Mode
V
SUP
Full
-
-
-
-
-
-
/V
DD
150 ms (typ.) timeout
SPI/PWM
SPI/PWM
V
Rx-Only
SUP
Inputs
Full
SPI
/V
DD
(60)
(60)
Full/Rx-Only Rx-Only/Wake-up
Low-voltage Interrupt:
the VSUV threshold (
High-voltage Interrupt:
above the VSOV threshold (
Over-temperature Prewarning:
shutdown warning threshold. It is used to warn the MCU that
an over-temperature shutdown in the main 5.0 V regulator is
imminent.
LIN Over-temperature Shutdown / TXD Stuck At
Dominant / RXD Short-circuit:
cause the LIN driver to be disabled. In order to restart the
operation, the fault must be removed and TXD must go
recessive.
High Side Over-temperature Shutdown:
Low Side Over-temperature Shutdown:
V
SPI/PWM
SPI/PWM
On
Normal
SUP
Signals when the supply line (VS1) voltage drops below
Signals when the supply line (VS1) voltage increases
Signals when the 33911 temperature has reached the pre-
These signal fault conditions within the LIN interface will
Signals a shutdown in the high side output.
Signals a shutdown in the low side outputs.
Inputs
Mode
(63)
Full
SPI
/V
/Off
DD
Stop Mode
Wake-up
Note
Stop
V
DD
-
-
-
V
(61)
SUV
FUNCTIONAL DEVICE OPERATIONS
).
V
SOV
Sleep Mode
Wake-up
Wake-up
Note
).
-
-
-
-
-
(62)
OPERATIONAL MODES
33911
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