XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 232
XC908AS60ACFU
Manufacturer Part Number
XC908AS60ACFU
Description
MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
Manufacturer
Motorola Semiconductor Products
Datasheet
1.XC908AS60ACFU.pdf
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Low Voltage Inhibit (LVI)
16.4.1 Polled LVI Operation
16.4.2 Forced Reset Operation
16.4.3 False Reset Protection
Technical Data
232
$FE0F
Addr.
Register Name
LVI Status Register (LVISR) LVIOUT
In applications that can operate at V
software can monitor V
register, the LVIPWR bit must be at logic 1 to enable the LVI module, and
the LVIRST bit must be at logic 0 to disable LVI resets.
In applications that require V
enabling LVI resets allows the LVI module to reset the MCU when V
falls to the LVI
more consecutive CPU cycles. In the configuration register, the LVIPWR
and LVIRST bits must be at logic 1 to enable the LVI module and to
enable LVI resets.
The V
supply noise. In order for the LVI module to reset the MCU,V
remain at or below the LVI
cycles. V
MCU out of reset.
Figure 16-2. LVI I/O Register Summary
DD
DD
pin level is digitally filtered to reduce false resets due to power
must be above LVI
Bit 7
Low Voltage Inhibit (LVI)
TRIPF
= Unimplemented
level and remains at or below that level for nine or
6
DD
by polling the LVIOUT bit. In the configuration
TRIPF
DD
5
TRIPR
to remain above the LVI
level for nine or more consecutive CPU
DD
for only one CPU cycle to bring the
4
levels below the LVI
3
MC68HC908AZ60A — Rev 2.0
2
TRIPF
1
TRIPF
MOTOROLA
DD
level,
must
level,
Bit 0
DD
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