MC68HC08AZ60 Datasheet, PDF (58/452 Pages) Motorola, Inc – Advance Information

EEPROM-2
EEPROM Block
Protection
Freescale Semiconductor, Inc.
mode cannot be modified. If EEPGM is set, the onboard
charge pump generates the erase voltage and applies it to the
user EEPROM array. When the EEPGM bit is cleared, the
erase voltage is removed from the array and the internal
charge pump is turned off.
c. Any attempt to clear both EEPGM and EELAT bits with a
single instruction will only clear EEPGM. This is to allow time
for removal of high voltage from the EEPROM array.
All bits should be erased before being programmed.
The 512 bytes of EEPROM are divided into four 128-byte blocks. Each
of these blocks can be separately protected by 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. Table 1
shows the address ranges within the blocks.
Table 1. EEPROM Array Address Blocks
Block Number (EEBPx)
EEBP0
EEBP1
EEBP2
EEBP3
Address Range
$0600–$067F
$0680–$06FF
$0700–$077F
$0780–$07FF
If EEBPx bit is set, that corresponding address block is protected. These
bits are effective after a reset or a read to EENVR2 register. The block
protect configuration can be modified by erasing/programming the
corresponding bits in the EENVR2 register and then reading the
EENVR2 register.
MC68HC08AZ60 — Rev 1.0
58
EEPROM-2
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Go to: www.freescale.com
6-eeprom-2
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