MC68HC912DG128A MOTOROLA [Motorola, Inc], MC68HC912DG128A Datasheet - Page 101
MC68HC912DG128A
Manufacturer Part Number
MC68HC912DG128A
Description
microcontroller unit 16BIT DEVICE
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC912DG128A.pdf
(404 pages)
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1-eeprom
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Contents
Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
EEPROM Selective Write More Zeros . . . . . . . . . . . . . . . . . . . . . . . 102
EEPROM Programmer’s Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
EEPROM Control Registers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Program/Erase Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Shadow Word Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
Programming EEDIVH and EEDIVL Registers . . . . . . . . . . . . . . . . . 112
The MC68HC912DT128A EEPROM nonvolatile memory is arranged in
a 16-bit configuration. The EEPROM array may be read as either bytes,
aligned words or misaligned words. Access times are one bus cycle for
byte and aligned word access and two bus cycles for misaligned word
operations.
Programming is by byte or aligned word. Attempts to program or erase
misaligned words will fail. Only the lower byte will be latched and
programmed or erased. Programming and erasing of the user EEPROM
can be done in normal modes.
Each EEPROM byte or aligned word must be erased before
programming. The EEPROM module supports byte, aligned word, row
(32 bytes) or bulk erase, all using the internal charge pump. The erased
state is $FF. The EEPROM module has hardware interlocks which
protect stored data from corruption by accidentally enabling the
program/erase voltage. Programming voltage is derived from the
internal V
DD
supply with an internal charge pump.
EEPROM
MC68HC912DT128A Rev 2.0
EEPROM
EEPROM
101
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