MC33910G5AC/MC3433910G5AC
FUNCTIONAL DEVICE OPERATIONS
LOGIC COMMANDS AND REGISTERS
VSOV - VSUP Over-voltage
Table 14. Wake-up Control Register - $2
This read-only bit indicates an over-voltage condition on
the VS1 pin.
C3
C2
C1
C0
1 = Over-voltage condition.
0 = Normal condition.
Write
0
0
0
L1WE
Reset
Value
1
1
1
1
VSUV - VSUP Under-voltage
This read-only bit indicates an under-voltage condition on
the VS1 pin.
Reset
Condition
POR, Reset mode or ext_reset
1 = Under-voltage condition.
0 = Normal condition.
L1WE - Wake-up Input Enable
This write-only bit enables/disables the L1 input. In Stop
and Sleep mode the L1WE bit activates the L1 input for wake-
up. If the L1 input is selected on the analog multiplexer, the
L1WE is masked to 0.
VDDOT - Main Voltage Regulator Over-temperature
Warning
This read-only bit indicates that the main voltage regulator
temperature reached the Over-temperature Prewarning
Threshold.
1 = Wake-up Input enabled.
0 = Wake-up Input disabled.
1 = Over-temperature Prewarning
0 = Normal
Wake-up Status Register - WUSR
This register is used to monitor the digital wake-up input
and is also returned when writing to the WUCR.
BATFAIL - Battery Fail Flag.
This read-only bit is set during power-up and indicates that
the 33910 had a Power-On-Reset (POR).
Table 15. Wake-up Status Register - $2/$3
S3
S2
S1
S0
Any access to the MCR or VSR will clear the BATFAIL flag.
1 = POR Reset has occurred
Read
-
-
-
L1
0 = POR Reset has not occurred
L1 - Wake-up input 1
Wake-up Control Register - WUCR
This read-only bit indicates the status of the L1 input. If the
L1 input is not enabled, then the Wake-up status will return 0.
This register is used to control the digital wake-up input.
Writing the WUCR will return the Wake-Up Status Register
(WUSR).
After a wake-up from Stop or Sleep mode this bit also
allows to verify the L1 input has caused the wake-up, by first
reading the Interrupt Status Register (ISR) and then reading
the WUSR. The source of the wake-up is only reported on the
first WUCR or WUSR access.
1 = L1 pin high, or L1 is the source of the wake-up.
0 = L1 pin low, disabled or selected as an analog input.
33910
Analog Integrated Circuit Device Data
Freescale Semiconductor
40
FREESCALE [ Freescale ]
