
Technical Data
MC68HC11E Family
—
Rev. 4
100
Operating Modes and On-Chip Memory
MOTOROLA
Operating Modes and On-Chip Memory
PTCON
—
Protect CONFIG Register Bit
0 = CONFIG register can be programmed or erased normally.
1 = CONFIG register cannot be programmed or erased.
BPRT[3:0]
—
Block Protect Bits for EEPROM
When set, these bits protect a block of EEPROM from being
programmed or electronically erased. Ultraviolet light, however, can
erase the entire EEPROM contents regardless of BPRT[3:0]
(windowed packages only). Refer to
Table 4-6
and
Table 4-7
.
When cleared, BPRT[3:0] allow programming and erasure of the
associated block.
Table 4-6. EEPROM Block Protect
Bit Name
Block Protected
Block Size
BPRT0
$B600
–
$B61F
32 bytes
BPRT1
$B620
–
$B65F
64 bytes
BPRT2
$B660
–
$B6DF
128 bytes
BPRT3
$B6E0
–
$B7FF
288 bytes
Table 4-7. EEPROM Block Protect in MC68HC811E2 MCUs
Bit Name
Block Protected
Block Size
BPRT0
$x800
–
$x9FF
(1)
1. x is determined by the value of EE[3:0] in CONFIG register. Refer to
Figure 4-13
.
512 bytes
BPRT1
$xA00
–
$xBFF
(1)
512 bytes
BPRT2
$xC00
–
$xDFF
(1)
512 bytes
BPRT3
$xE00
–
$xFFF
(1)
512 bytes