Freescale Semiconductor, Inc.
Operating Modes and On-Chip Memory
BULKP — Bulk erase of EEPROM protect
1 = EEPROM cannot be bulk or row erased.
0 = EEPROM can be bulk erased normally.
Bit 6 — not implemented; always reads zero.
BPRT4 — Block protect bit for top 128 bytes of EEPROM (see below)
PTCON — Protect for CONFIG register
1 = CONFIG register cannot be programmed or erased.
0 = 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 = Protection is enabled for associated block; it cannot be
programmed or erased.
0 = Protection disabled for associated block.
Each of these five bits protects a block of EEPROM against writing or
erasure, as follows:
Table 3-7. EEPROM block protect
Bit name
BPRT0
BPRT1
BPRT2
BPRT3
BPRT4
Block protected
$xD80–$xD9F
$xDA0–$xDDF
$xDE0–$xE5F
$xE60–$xF7F
$xF80–$xFFF
Block size
32 bytes
64 bytes
128 bytes
288 bytes
128 bytes
Technical Data
MC68HC11P2 — Rev 1.0
Operating Modes and On-Chip Memory
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