MC68HC08AS32 Datasheet, PDF (72/394 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

Electrically Erasable Programmable ROM
6.4.7 EEPROM Non-volatile Register and EEPROM Array Configuration Register
These registers configure the EEPROM array blocks for programming
purposes. EEACR loads its contents from the EENVR register at reset
and upon any read of the EENVR register.
Address: $FE1F
Bit 7
6
5
4
3
2
1
Bit 0
Read: EERA
R
R
R
EEBP3 EEBP2 EEBP1 EEBP0
Write: R
R
R
R
R
R
R
R
Reset: EENVR
R
R
R
EENVR EENVR EENVR EENVR
R = Reserved
Figure 6-2. EEPROM Array Control Register (EEACR)
Address: $FE1C
Bit 7
6
5
4
3
2
1
Bit 0
Read:
EERA
R
R
Write:
R
EEBP3 EEBP2 EEBP1 EEBP0
Reset: PV
R
R
R
PV
PV
PV
PV
R = Reserved
PV = Programmed Value or 1 in the Erased State
Figure 6-3. EEPROM Non-volatile Register (EENVR)
EERA — EEPROM Redundant Array Bit
This programmable/erasable/readable bit in EENVR and read-only bit
in EEACR configures the array in redundant mode. Reset loads
EERA from EENVR to EEACR.
1 = EEPROM array in redundant mode configuration
0 = EEPROM array in normal mode configuration
EEBP3–EEBP0 — EEPROM Block Protection Bits
These programmable/erasable/readable bits in EENVR and
read-only bits in EEACR select blocks of EEPROM array to keep
them from being programmed or erased. Reset loads EEBP[3:0] from
EENVR to EEACR. See 6.4.3 EEPROM Block Protection.
1 = EEPROM array block protected
0 = EEPROM array block unprotected
Advance Information
72
MC68HC08AS32 — Rev. 3.0
Electrically Erasable Programmable ROM (EEPROM)
MOTOROLA