MC68HC908AS60ACFN FREESCALE [Freescale Semiconductor, Inc], MC68HC908AS60ACFN Datasheet - Page 97

• Manufacturer Part Number: MC68HC908AS60ACFN
• Description: M68HC08 Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

These two registers are protected from erase and program operations if the EEDIVSECD is set to logic 1
in EE2DIVH or programmed to a logic 1 in EE2DIVHNVR.
7.6 Low-Power Modes
The WAIT and STOP instructions can put the MCU in low power-consumption standby modes.
7.6.1 Wait Mode
The WAIT instruction does not affect the EEPROM. It is possible to start the program or erase sequence
on the EEPROM and put the MCU in wait mode.
7.6.2 Stop Mode
The STOP instruction reduces the EEPROM power consumption to a minimum. The STOP instruction
should not be executed while a programming or erasing sequence is in progress.
If stop mode is entered while EELAT and EEPGM are set, the programming sequence will be stopped
and the programming voltage to the EEPROM array removed. The programming sequence will be
restarted after leaving stop mode; access to the EEPROM is only possible after the programming
sequence has completed.
If stop mode is entered while EELAT and EEPGM is cleared, the programming sequence will be
terminated abruptly.
In either case, the data integrity of the EEPROM is not guaranteed.
Freescale Semiconductor
Once EEDIVSECD in the EE2DIVHNVR is programmed to 0 and after a
system reset, the EE2DIV security feature is permanently enabled because
the EEDIVSECD bit in the EE2DIVH is always loaded with 0 thereafter.
Once this security feature is armed, erase and program mode are disabled
for EE2DIVHNVR and EE2DIVLNVR. Modifications to the EE2DIVH and
EE2DIVL registers are also disabled. Therefore, care should be taken
before programming a value into the EE2DIVHNVR.
MC68HC908AZ60A • MC68HC908AS60A • MC68HC908AS60E Data Sheet, Rev. 6
NOTE
Low-Power Modes
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