mc68hc08qa24 Freescale Semiconductor, Inc, mc68hc08qa24 Datasheet - Page 80

• Manufacturer Part Number: mc68hc08qa24
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Electrically Erasable Programmable Read-Only Memory (EEPROM)
Technical Data
78
NOTE:
NOTE:
Electrically Erasable Programmable Read-Only Memory (EEPROM)
The EEPROM requires a recovery time to stabilize after clearing the
EEOFF bit.
EERAS1 and EERAS0 — EEPROM Erase Bits
These read/write bits set the programming/erasing modes. Reset clears
these bits.
EELAT — EEPROM Latch Control Bit
EEPGM — EEPROM Program/Erase Enable Bit
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.
This read/write bit latches the address and data buses for
programming the EEPROM array. EELAT cannot be cleared if
EEPGM is still set. Reset clears this 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.
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
EEBPx
Table 6-3. EEPROM Program/Erase Mode Select
0
0
0
0
1
EERAS1
X
0
0
1
1
EERA0
X
0
1
0
1
No erase/program
Byte program
Block erase
Byte erase
Bulk erase
MODE
Freescale Semicon-
MC68HC08QA24