MC68HC08AZ16 Datasheet, PDF (43/527 Pages) Motorola, Inc – HCMOS Microcontroller Unit

EEPROM
Introduction
This section describes the electrically eraseable programmable ROM
(EEPROM).
Features
• Modular architecture expandable in 128 bytes
• Byte, block or bulk erasable
• Non-volatile redundant array option
• Non-volatile block protection option
• Non-volatile MCU configuration bits
• On-chip charge pump for programming/erasing.
•
Functional description
512 bytes of EEPROM can be programmed or erased without an
external voltage supply. The EEPROM has a lifetime of 10,000
write-erase cycles in the non-redundant mode. Reliability (data
retention) is further extended if the redundancy option is selected.
EEPROM cells are protected with a non-volatile block protection option.
These options are stored in the EEPROM non-volatile register (EENVR)
and are loaded into the EEPROM array configuration register after reset
(EEACR) or after a read of EENVR. Hardware interlocks are provided to
protect stored data corruption from accidental programming/erasing.
The EEPROM array will leave the factory in the erased state all
addresses logic ‘1’, the EENVR register will be programmed to #10 such
that the full array is available and unprotected.
MC68HC08AZ32
42
EEPROM
2--eeprom
MOTOROLA