mc68hc908gp20 Freescale Semiconductor, Inc, mc68hc908gp20 Datasheet - Page 202

• Manufacturer Part Number: mc68hc908gp20
• Description: M68hc08 Family Of 8-bit Microcontroller Units Mcus
• Manufacturer: Freescale Semiconductor, Inc

14.4.2 Forced Reset Operation
14.4.3 Voltage Hysteresis Protection
14.4.4 LVI Trip Selection
Advance Information
202
NOTE:
In applications that require V
enabling LVI resets allows the LVI module to reset the MCU when V
falls below the V
and LVIRSTD bits must be at logic 0 to enable the LVI module and to
enable LVI resets.
Once the LVI has triggered (by having V
will maintain a reset condition until V
voltage, V
continually entering and exiting reset if V
V
The LVI5OR3 bit in the configuration register selects whether the LVI is
configured for 5-V or 3-V protection.
The microcontroller is guaranteed to operate at a minimum supply
voltage. The trip point (V
this. (See
actual trip point voltages.)
TRIPF
. V
TRIPR
TRIPR
Section 23. Preliminary Electrical Specifications
. This prevents a condition in which the MCU is
is greater than V
TRIPF
level. In the configuration register, the LVIPWRD
TRIPF
DD
[5 V] or V
to remain above the V
TRIPF
DD
by the hysteresis voltage, V
rises above the rising trip point
TRIPF
DD
DD
fall below V
is approximately equal to
[3 V]) may be lower than
MC68HC908GP20
Freescale Semiconductor
TRIPF
TRIPF
level,
), the LVI
for the
—
Rev 2.1
HYS
DD
.