mc33911 Freescale Semiconductor, Inc, mc33911 Datasheet - Page 35

• Manufacturer Part Number: mc33911
• Description: Mc33911 Lin System Basis Chip With Dc Motor Pre-driver
• Manufacturer: Freescale Semiconductor, Inc

MOD2, MOD1 - Mode Control Bits
to clear the watchdog in accordance with
Control Bits.
Table 10. Mode Control Bits
Voltage Status Register - VSR
register is also returned when writing to the Mode Control
Register (MCR).
VSOV - V
the VS1 pin.
VSUV - V
the VS1 pin.
VDDOT - Main Voltage Regulator Over-temperature
Warning
temperature reached the Over-temperature Prewarning
Threshold.
BATFAIL - Battery Fail Flag.
the 33911 had a Power On Reset (POR).
will clear the BATFAIL flag.
Analog Integrated Circuit Device Data
Freescale Semiconductor
MOD2
These write-only bits select the operating mode and allow
Returns the status of the several voltage monitors. This
This read-only bit indicates an over-voltage condition on
1 = Over-voltage condition.
0 = Normal condition.
This read-only bit indicates an under-voltage condition on
1 = Under-voltage condition.
0 = Normal condition.
This read-only bit indicates that the main voltage regulator
1 = Over-temperature Prewarning
0 = Normal
This read-only bit is set during power-up and indicates that
Any access to the MCR or Voltage Status Register (VSR)
0
0
1
1
Table 11. Voltage Status Register - $0/$1
SUP
SUP
Read
MOD1
Under-voltage
Over-voltage
0
1
0
1
VSOV
S3
Normal Mode + watchdog Clear
VSUV
S2
Normal Mode
Description
Sleep Mode
Stop Mode
VDDOT
S1
Table 12
BATFAIL
S0
Mode
Wake-up Control Register - WUCR
Writing the Wake-up Control Register (WUCR) will return the
Wake-up Status Register (WUSR).
Table 12. Wake-up Control Register - $2
LxWE - Wake-up Input x Enable
enabled. In Stop and Sleep mode the LxWE bit determines
which wake inputs are active for wake-up. If one of the Lx
inputs is selected on the analog multiplexer, the
corresponding LxWE is masked to 0.
Wake-up Status Register - WUSR
and is also returned when writing to the WUCR.
Lx - Wake-up input x
Lx input. If the Lx input is not enabled then the according
Wake-Up status will return 0.
allow to determine which input has caused the wake-up, by
first reading the Interrupt Status Register (ISR) and then
reading the WUSR.
1 = POR Reset has occurred
0 = POR Reset has not occurred
This register is used to control the digital wake-up inputs.
This write-only bit enables/disables which Lx inputs are
1 = Wake-up Input x enabled.
0 = Wake-up Input x disabled.
This register is used to monitor the digital wake-up inputs
This read-only bit indicates the status of the corresponding
After a wake-up form Stop or Sleep Mode these bits also
1 = Lx Wake-up.
0 = Lx Wake-up disabled or selected as analog input.
Table 13. Wake-Up Status Register - $2/$3
Condition
Reset
Value
Reset
Write
Read
C3
S3
0
1
-
POR, Reset Mode or ext_reset
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATIONS
C2
S2
0
1
-
L2WE
C1
S1
L2
1
L1WE
C0
S0
L1
1
33911
35