MC68HC08AB16A Datasheet, PDF (63/380 Pages) Motorola, Inc – HCMOS Microcontroller Unit

Freescale Semiconductor, Inc.
EEPROM
Functional Description
5.4 Functional Description
The 512 bytes of EEPROM is located at $0800–$09FF, and can be
programmed or erased without an additional external high voltage
supply. The program and erase operations are enabled through the use
of an internal charge pump. For each byte of EEPROM, the write/erase
endurance is 10,000 cycles.
5.5 EEPROM Configuration
The 8-bit EEPROM non-volatile register (EENVR) and the 16-bit
EEPROM timebase divider mask option register (EEDIVMOR) contain
the default settings for the following EEPROM configurations:
• Security option
• Block protection
• EEPROM timebase reference
EENVR is a non-volatile EEPROM register. It is programmed and
erased in the same way as an EEPROM byte. EEDIVMOR is a mask
option register, specified at the same time as the ROM code. The
contents of these registers are loaded into their respective volatile
registers during a MCU reset. The values in these read/write, volatile
registers define the EEPROM configurations.
For EENVR, the corresponding volatile register is the EEPROM array
configuration register (EEACR).
For the EEDIVMOR (two 8-bit registers: EEDIVHMOR and
EEDIVLMOR), the corresponding volatile register is the EEPROM
timebase divider register (EEDIV: EEDIVH and EEDIVL)
MC68HC08AB16A — Rev. 2.0
MOTOROLA
EEPROM
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Technical Data
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