MC68HC08AS32 Datasheet, PDF (42/280 Pages) Motorola, Inc – M68HC08 Family of 8-bit microcontroller units (MCUs)

2.5.1.7 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
Read: EERA
R
R
Write: R
R
R
Reset: EENVR
R
R
R
= Reserved
4
3
2
1
R
EEBP3 EEBP2 EEBP1
R
R
R
R
R
EENVR EENVR EENVR
Figure 2-4. EEPROM Array Control Register (EEACR)
Bit 0
EEBP0
R
EENVR
Address:
Read:
Write:
Reset:
$FE1C
Bit 7
6
5
4
3
2
1
EERA
R
R
R
EEBP3 EEBP2 EEBP1
PV
R
R
R
PV
PV
PV
R
= Reserved
PV = Programmed value or 1 in the erased state
Figure 2-5. EEPROM Non-volatile Register (EENVR)
Bit 0
EEBP0
PV
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 2.5.1.3
EEPROM Block Protection.
1 = EEPROM array block protected
0 = EEPROM array block unprotected
Data Sheet
42
MC68HC08AS32 — Rev. 4.1
Freescale Semiconductor