MC912DG128A Motorola, MC912DG128A Datasheet - Page 375

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

2d. EEPROM
Selective Write
More Zeros
3. STOP mode
4. WAIT mode
5. KWU Filter
6. Port ADx
7. ATD
3-appA
MOTOROLA
The AUTO function enables the logic of the MCU to automatically use
the optimum programming or erasing time for the EEPROM. If using
AUTO, the user does not need to wait for the normal minimum specified
programming or erasing time. After setting the EEPGM bit as normal the
user just has to poll that bit again, waiting for the MCU to clear it
indicating that programming or erasing is complete.
For some applications it may be advantageous to track more than 10k
events with a single byte of EEPROM by programming one bit at a time.
For that purpose, a special selective bit programming technique is
available.
When this technique is utilized, a program / erase cycle is defined as
multiple writes (up to eight) to a unique location followed by a single
erase sequence.
This new version will correctly exit STOP mode without having to
synchronize the start of STOP with the RTI clock.
This new version will correctly exit WAIT mode using short XIRQ or IRQ
inputs.
The KWU filter will now ignore pulses shorter than 2 microseconds.
Power must be applied to VDDA at all times even if the ADC is not being
used. This is necessary for port AD0 and port AD1 to function correctly
as digital inputs.
Bit CC of ATDxCTL5 is not masked when bit S8CM = 1.
Appendix A: MC68HC912DT128A
Significant changes from the MC68HC912DG128 (non-A suffix device)
Appendix A: MC68HC912DT128A
MC68HC912DT128A Rev 2.0
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