MC68HC908AZ60 Datasheet, PDF (52/480 Pages) Motorola, Inc – HCMOS Microcontroller Unit

FLASH-1 Memory
Low-Power Modes
The WAIT and STOP instructions put the MCU in low power
consumption standby modes.
WAIT Mode
Putting the MCU into wait mode while the FLASH is in read mode does
not affect the operation of the FLASH memory directly, but there will not
be any memory activity since the CPU is inactive.
The WAIT instruction should not be executed while performing a
program or erase operation on the FLASH. When the MCU is put into
wait mode, the charge pump for the FLASH is disabled so that either a
program or erase operation will not continue. If the memory is in either
program mode (PGM = 1, HVEN = 1) or erase mode (ERASE = 1, HVEN
= 1), then it will remain in that mode during wait. Exit from wait must now
be done with a reset rather than an interrupt because if exiting wait with
an interrupt, the memory will not be in read mode and the interrupt vector
cannot be read from the memory.
STOP Mode
When the MCU is put into stop mode, if the FLASH is in read mode, it
will be put into low power standby.
The STOP instruction should not be executed while performing a
program or erase operation on the FLASH. When the MCU is put into
stop mode, the charge pump for the FLASH is disabled so that either a
program or erase operation will not continue. If the memory is in either
program mode (PGM = 1, HVEN = 1) or erase mode (ERASE = 1, HVEN
= 1), then it will remain in that mode during stop. Exit from stop must now
be done with a reset rather than an interrupt because if exiting stop with
an interrupt, the memory will not be in read mode and the interrupt vector
cannot be read from the memory.
MC68HC908AZ60 — Rev 2.0
50
FLASH-1 Memory
16-flash-1
MOTOROLA