MC68HC708AS48

Manufacturer Part NumberMC68HC708AS48
DescriptionAdvance Information
ManufacturerFREESCALE [Freescale Semiconductor, Inc]
MC68HC708AS48 datasheet
 
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Page 75/396

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EERAS1:EERAS0 — EEPROM Erase Bits
These read/write bits set the programming/erasing modes. Reset
clears these bits.
EELAT — EEPROM Latch Control Bit
This read/write bit latches the address and data buses for
programming the EEPROM array. EELAT can not be cleared if
EEPGM is still set. Reset clears this bit.
EEPGM — EEPROM Program/Erase Enable Bit
This read/write bit enables the internal charge pump and applies the
programming/erasing voltage to the EEPROM array if the EELAT bit
is set and a write to a valid EEPROM location has occurred. Reset
clears the EEPGM bit.
NOTE:
Writing logic 0s to both the EELAT and EEPGM bits with a single
instruction will clear only EEPGM. This is to allow time for the removal of
high voltage.
MC68HC708AS48
Rev. 4.0
MOTOROLA
Electrically Erasable Programmable ROM (EEPROM)
Electrically Erasable Programmable ROM (EEPROM)
Table 6-3. EEPROM Program/Erase Mode Select
EEBPx
EERAS1
0
0
0
0
0
1
0
1
1
X
X = don’t care
1 = Buses configured for EEPROM programming
0 = Buses configured for normal read operation
1 = EEPROM programming/erasing power switched on
0 = EEPROM programming/erasing power switched off
Functional Description
EERA0
MODE
0
Byte Program
1
Byte Erase
0
Block Erase
1
Bulk Erase
X
No Erase/Program
Advance Information
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