mc68hc908kx8 Freescale Semiconductor, Inc, mc68hc908kx8 Datasheet - Page 199

• Manufacturer Part Number: mc68hc908kx8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

B.2.2 Partial Use of FLASH-Related Module
16.3 Monitor ROM (MON)
MON functions are maintained for the ROM version. MON will allow execution of code in random-access
memory (RAM) or ROM and provide ROM memory security
though, will have no effect in ROM version.
An assumption that must be made for the ROM version is that the reset vector will always have a value
different from $0000, corresponding to the user code start address. For this reason, force entry into
monitor mode, described in
applicable to the ROM version. The MENRST module has been eliminated from the ROM version.
The security function described in
version.
B.3 Configuration Register Programming
Functionally, the terms MOR (mask option register) and CONFIG (configuration register) can be used
interchangeably. MOR and CONFIG are equivalent since both define the same module functionality
options through the registers bits. As a naming convention, though, configuration registers are named
MOR for a ROM version and CONFIG for a FLASH version.
Some modules affected by the configuration register bits make reference to default values of these bits
and have recommendation notes on programming them.
For specific information see:
1. No security feature is absolutely secure. However, Freescale’s strategy is to make reading or copying the ROM difficult for
Freescale Semiconductor
unauthorized users.
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•
•
•
•
•
FLASH —
ICG —
LVI —
PORT —
COP —
CONFIG —
10.3 Functional Description
7.6 CONFIG (or MOR) Register Options
The user must keep in mind that these notes are not entirely applicable to
the MOR found in the ROM version. The MOR bits can neither assume the
described CONFIG default values after reset nor can they be modified later
under user code control. While the MOR is mask defined, and consequently
unwritable, CONFIG can be written once after each reset.
5.4.7 COPD (COP Disable)
11.3.1 Port B Data Register
2.5 FLASH Memory (FLASH)
4.2 Functional Description
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
was written having FLASH as user memory and user vector space.
16.3.1.1 Monitor Mode Entry
16.3.2 Security
and
5.4.8 COPRS (COP Rate Select)
NOTE
also applies to the user ROM memory for the ROM
and in
(1)
. The memory programming interface,
16.3.1.3 Forced Monitor
Configuration Register Programming
Mode, is not
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