MC34912G5AC Freescale, MC34912G5AC Datasheet - Page 41

• Manufacturer Part Number: MC34912G5AC
• Manufacturer: Freescale

Specifications of MC34912G5AC

• Turn Off Delay Time: 10us
• Number Of Drivers: 4
• Operating Temperature (min): -40C
• Lead Free Status / RoHS Status: Compliant

MOD2, MOD1 - Mode Control Bits
clearing the watchdog in accordance with
Control Bits.
Table 12. 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 33912 had a Power-On-Reset (POR).
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 VSR will clear the BATFAIL flag.
Table 13. Voltage Status Register - $0/$1
0
0
1
1
Read
SUP
SUP
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 8
BATFAIL
Mode
S0
Wake-up Control Register - WUCR
Writing the WUCR will return the Wake-Up Status Register
(WUSR).
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. The source of the wake-up is only
reported on the first WUCR or WUSR access.
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 from Stop or Sleep mode these bits also
1 = Lx pin high, or Lx is the source of the wake-up.
0 = Lx pin low, disabled or selected as an analog input.
Table 15. Wake-up Status Register - $2/$3
Condition
Read
Reset
Value
Reset
Write
Table 14. Wake-Up Control Register - $2
L4WE
S3
C3
L4
1
POR, Reset mode or ext_reset
LOGIC COMMANDS AND REGISTERS
FUNCTIONAL DEVICE OPERATIONS
L3WE
C2
S2
L3
1
L2WE
C1
S1
1
L2
L1WE
C0
1
S0
L1
33912
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