MC68HC08AS32 Datasheet, PDF (43/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

2.5.2 Low-Power Modes
The following paragraphs describe the low-power modes.
2.5.2.1 Wait Mode
The WAIT instruction does not affect the EEPROM. It is possible to program the
EEPROM while the MCU is in wait mode. However, if the EEPROM is inactive,
power can be reduced by setting the EEOFF bit before executing the WAIT
instruction.
2.5.2.2 Stop Mode
The STOP instruction reduces the EEPROM power consumption to a minimum.
The STOP instruction should not be executed while the high voltage is turned on
(EEPGM = 1).
If stop mode is entered while program/erase is in progress, high voltage will be
turned off automatically. However, the EEPGM bit will remain set. When stop mode
is terminated and if EEPGM is still set, the high voltage will be turned back on
automatically. Program/erase time will need to be extended if program/erase is
interrupted by entering stop mode.
The module requires a recovery time, t_EESTOP, to stabilize after leaving stop mode
(see 17.4 5.0-Volt DC Electrical Characteristics). Attempts to access the array
during the recovery time will result in unpredictable behavior.
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor
Data Sheet
43