XC908AS60ACFU Motorola Semiconductor Products, XC908AS60ACFU Datasheet - Page 234

• Manufacturer Part Number: XC908AS60ACFU
• Description: MC68HC908AZ60A, MC68HC908AS60A Hcmos Microcontroller Unit Technical Data
• Manufacturer: Motorola Semiconductor Products

Low Voltage Inhibit (LVI)
16.7 Low-Power Modes
16.7.1 Wait Mode
16.7.2 Stop Mode
Technical Data
234
The WAIT and STOP instructions put the MCU in low power-
consumption standby modes.
With the LVIPWR bit in the configuration register programmed to logic 1,
the LVI module is active after a WAIT instruction.
With the LVIRST bit in the configuration register programmed to logic 1,
the LVI module can generate a reset and bring the MCU out of wait
mode.
With the LVISTOP and LVIPWR bits in the configuration register
programmed to a logic 1, the LVI module will be active after a STOP
instruction. Because CPU clocks are disabled during stop mode, the LVI
trip must bypass the digital filter to generate a reset and bring the MCU
out of stop.
With the LVIPWR bit in the configuration register programmed to logic 1
and the LVISTOP bit at a logic 0, the LVI module will be inactive after a
STOP instruction.
Note that the LVI feature is intended to provide the safe shutdown of the
microcontroller and thus protection of related circuitry prior to any
application V
intended that users operate the microcontroller at lower than specified
operating voltage V
DD
Low Voltage Inhibit (LVI)
voltage collapsing completely to an unsafe level. It is not
DD
.
MC68HC908AZ60A — Rev 2.0
MOTOROLA