MC68HC11KW1 Datasheet, PDF (63/238 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor HCMOS) microcontroller unit

the first 64 E clock cycles after reset in the normal modes; they can be set at any time. Once the
bits are cleared, the EEPROM array and the CONFIG register can be programmed or erased.
Setting the bits in the BPROT register to logic one protects the EEPROM and CONFIG register
until the next reset. Refer to Table 4-8.
BULKP — Bulk erase of EEPROM protect
1 (set) – EEPROM cannot be bulk or row erased.
0 (clear) – EEPROM can be bulk erased normally.
4
BIT6
BIT6 can be programmed to 0 in the first 64 cycles, although the bit has no meaning.
PTCON — Protect for CONFIG register
1 (set) – CONFIG register cannot be programmed or erased.
0 (clear) – CONFIG register can be programmed or erased normally.
Note that, in special modes, CONFIG may be written regardless of the state of PTCON.
BPRT[4:0] — Block protect bits for EEPROM
1 (set) – Protection is enabled for associated block; it cannot be programmed
or erased.
0 (clear) – Protection disabled for associated block.
Each of these five bits protects a block of EEPROM against writing or erasure, as follows:
Table 4-8 EEPROM block protect
Bit
name
BPRT0
BPRT1
BPRT2
BPRT3
BPRT4
Block
protected
Block size
$xD80–$xD9F 32 bytes
$xDA0–$xDDF 64 bytes
$xDE0–$xE5F 128 bytes
$xE60–$xF7F 288 bytes
$xF80–$xFFF 128 bytes
MC68HC11KW1
OPERATING MODES AND ON-CHIP MEMORY
4-19