MC912DG128A Motorola, MC912DG128A Datasheet - Page 110

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

EEPROM
MC68HC912DT128A Rev 2.0
110
ERASE — Erase Control
EELAT — EEPROM Latch Control
EEPGM — Program and Erase Enable
Read anytime. Write anytime if EEPGM = 0.
Configures the EEPROM for erasure or programming.
Unless BULKP is set, erasure is by byte, aligned word, row or bulk.
Read anytime.
Write anytime except when EEPGM = 1 or EEDIV = 0.
BYTE, ROW, ERASE and EELAT bits can be written simultaneously
or in any sequence.
The EEPGM bit can be set only after EELAT has been set. When
EELAT and EEPGM are set simultaneously, EEPGM remains clear
but EELAT is set.
The BULKP, AUTO, BYTE, ROW, ERASE and EELAT bits cannot be
changed when EEPGM is set. To complete a program or erase cycle
when AUTO bit is clear, two successive writes to clear EEPGM and
EELAT bits are required before reading the programmed data. When
AUTO bit is set, EEPGM is automatically cleared after the program or
erase cycle is over. A write to an EEPROM location has no effect
when EEPGM is set. Latched address and data cannot be modified
during program or erase.
0 = EEPROM configuration for programming.
1 = EEPROM configuration for erasure.
0 = EEPROM set up for normal reads.
1 = EEPROM address and data bus latches set up for
0 = Disables program/erase voltage to EEPROM.
1 = Applies program/erase voltage to EEPROM.
programming or erasing.
EEPROM
MOTOROLA
10-eeprom