MC68HC11E0CFNE3 Datasheet, PDF (52/242 Pages) Freescale Semiconductor, Inc – M68HC11E Family

Operating Modes and On-Chip Memory
Address: $1035
Bit 7
6
Read:
Write:
5
4
3
2
1
PTCON BPRT3 BPRT2 BPRT1
Reset: 0
0
0
1
1
1
1
= Unimplemented
Figure 2-16. Block Protect Register (BPROT)
Bit 0
BPRT0
1
Bits [7:5] — Unimplemented
Always read 0
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 2-6 and Table 2-7.
When cleared, BPRT[3:0] allow programming and erasure of the associated block.
Table 2-6. EEPROM Block Protect
Bit Name
BPRT0
BPRT1
BPRT2
BPRT3
Block Protected
$B600–$B61F
$B620–$B65F
$B660–$B6DF
$B6E0–$B7FF
Block Size
32 bytes
64 bytes
128 bytes
288 bytes
Table 2-7. EEPROM Block Protect in MC68HC811E2 MCUs
Bit Name
BPRT0
BPRT1
BPRT2
BPRT3
Block Protected
$x800–$x9FF⁽¹⁾
$xA00–$xBFF⁽¹⁾
$xC00–$xDFF⁽¹⁾
$xE00–$xFFF⁽¹⁾
Block Size
512 bytes
512 bytes
512 bytes
512 bytes
1. x is determined by the value of EE[3:0] in CONFIG register. Refer to Figure
2-13.
M68HC11E Family Data Sheet, Rev. 5.1
52
Freescale Semiconductor