MC68HC708AS48 FREESCALE [Freescale Semiconductor, Inc], MC68HC708AS48 Datasheet - Page 72

• Manufacturer Part Number: MC68HC708AS48
• Description: Advance Information
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Electrically Erasable Programmable ROM
6.4.3 EEPROM Block Protection
Advance Information
72
The 640 bytes of EEPROM are divided into two 256-byte blocks and one
128-byte block. Each of these blocks can be protected separately by the
EEBPx bit. Any attempt to program or erase memory locations within the
protected block will not allow the program/erase voltage to be applied to
the array.
If the EEBPx bit is set, that corresponding address block is protected.
These bits are effective after a reset or a read to the EENVR register.
The block protect configuration can be modified by erasing/
programming the corresponding bits in the EENVR register and then
reading the EENVR register.
In redundant mode EEBP2 will have no meaning.
Electrically Erasable Programmable ROM (EEPROM)
Table 6-2
Block Number (EEBPx)
Table 6-2. EEPROM Array Address Blocks
EEBP0
EEBP1
EEBP2
shows the address ranges within the blocks.
Address Range
$0A00–$0A7F
$0800–$08FF
$0900–$09FF
MC68HC708AS48
MOTOROLA
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Rev. 4.0