mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 41

• Manufacturer Part Number: mc68hc908rf2
• Description: M68hc08 Microcontrollers Microcontroller / Transmitter
• Manufacturer: Freescale Semiconductor, Inc

2.5.9 Low-Power Modes
2.5.9.1 Wait Mode
2.5.9.2 Stop Mode
MC68HC908RF2 — Rev. 4.0
MOTOROLA
The WAIT and STOP instructions put the MCU in low power-consumption standby
modes.
Putting the MCU into wait mode while the FLASH 2TS is in read mode does not
affect the operation of the FLASH 2TS memory directly, but there will be no
memory activity since the CPU is inactive.
The WAIT instruction should not be executed while performing a program or erase
operation on the FLASH 2TS. When the MCU is put into wait mode, the charge
pump for the FLASH 2TS 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 mode 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.
When the MCU is put into stop mode, if the FLASH 2TS 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 2TS. When the MCU is put into stop mode, the charge
pump for the FLASH 2TS 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 mode now must 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.
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Memory
FLASH 2TS Memory
Data Sheet
Memory
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