MC68HC08AZ32A Datasheet, PDF (439/456 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
MC68HC08AZ32A Changes
Significant Changes from the MC68HC08AZ32 (Non-A Suffix Device)
25.2.3.3 EEPROM AUTO Programming & Erasing
The second major change to the EEPROM is the inclusion in the
EEPROM control register (EECR) of an AUTO function using previously
unused bit 1 of that register.
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.
25.2.4 Mask Option Registers
25.2.4.1 Mask Option Register A
The Mask Option Register A is changed to bring it into line with the
majority of other HC08AS & AZ family devices. Although the changes
are minor, the implications of the change are major so users should pay
particular attention when choosing the mask options to be programmed
into ROM especially if code execution depends upon reads of this
register. As always, users should check carefully the MOR selections of
any device since minor differences within families often exist.
Bit 2, COPRS has changed in polarity such that when selected as a ‘1’
a short COP timeout time out period of 8176 cycles is enabled.
Bit 4, LVIPWR was previously LVIPWRD i.e. when selected as a ‘1’ the
LVI power is now enabled and not disabled.
Bit 5, LVIRST was previously LVIRSTD i.e. when selected as a ‘1’ the
LVI enables the reset signal from the LVI module and does not disable.
Bits 0,1,3, 6 and 7 remain unchanged from the previous revision.
However, bit 6 (ROMSEC) now works, enabling ROM security.
Previously, this function did not work and was an errata on non-A
versions.
MC68HC08AZ32A — Rev 1.0
MOTOROLA
MC68HC08AZ32A Changes
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Technical Data
439