MC68HC908AZ32ACFU MOTOROLA [Motorola, Inc], MC68HC908AZ32ACFU Datasheet - Page 78
MC68HC908AZ32ACFU
Manufacturer Part Number
MC68HC908AZ32ACFU
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908AZ32ACFU.pdf
(468 pages)
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EEPROM
5.5 Functional Description
5.5.1 EEPROM Configuration
5.5.2 EEPROM Timebase Requirements
Advance Information
78
The 512 bytes of EEPROM are 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.
The 8-bit EEPROM Non-Volatile Register (EENVR) and the 16-bit
EEPROM Timebase Divider Non-Volatile Register (EEDIVNVR) contain
the default settings for the following EEPROM configurations:
EENVR and EEDIVNVR are non-volatile EEPROM registers. They are
programmed and erased in the same way as EEPROM bytes. 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 EEDIVNCR (two 8-bit
registers: EEDIVHNVR and EEDIVLNVR), the corresponding volatile
register is the EEPROM Divider Register (EEDIV: EEDIVH and EE
DIVL).
A 35 s timebase is required by the EEPROM control circuit for program
and erase of EEPROM content. This timebase is derived from dividing
the CGMXCLK or bus clock (selected by EEDIVCLK bit in CONFIG-2
Register) using a timebase divider circuit controlled by the 16-bit
EEPROM Timebase Divider EEDIV Register (EEDIVH and EEDIVL).
Freescale Semiconductor, Inc.
•
•
•
For More Information On This Product,
EEPROM Timebase Reference
EEPROM Security Option
EEPROM Block Protection
Go to: www.freescale.com
EEPROM
68HC908AZ32A — Rev 0.0
MOTOROLA
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