mc68hc908kx8 Freescale Semiconductor, Inc, mc68hc908kx8 Datasheet - Page 197

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

Appendix B
MC68HC08KX8
B.1 Introduction
This appendix describes the differences between the read-only memory (ROM) version (MC68HC08KX8)
and the FLASH version (MC68HC908KX8) of the microcontroller.
Basically, the differences are:
B.2 FLASH x ROM Module Changes
This subsection describes changes between the FLASH and ROM modules.
B.2.1 FLASH for ROM Substitution
FLASH memory and FLASH supporting modules are replaced by ROM memory, see
In
and user ROM vector space.
Additionally, these modules and registers have been eliminated in the ROM version:
Freescale Semiconductor
Figure
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Configuration register programming
Wider range of operating voltage
FLASH burn-in ROM module — Auxiliary FLASH routine codes
FLASH charge pump module — High-voltage for FLASH programming
MENRST module — Helps erased FLASH parts programming, see
Entry Reset (MENRST)
SIM reset status register, bit 2 — Refers to MENRST. See
MENRST has no function in the ROM version and reading this bit will return 0.
FLASH test control register, FLTCR
FLASH control register, FLCR
FLASH block protect register, FLBPR
FLASH x ROM module changes
B-1, the user FLASH and user FLASH vector space are respectively substituted by user ROM
FLASH for ROM substitution
Partial use of FLASH-related module
MC68HC908KX8 • MC68HC908KX2 • MC68HC08KX8 Data Sheet, Rev. 2.1
13.7.1 SIM Reset Status
13.3.1.5 Forced Monitor Mode
Figure
Register.
B-1.
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