MC9S12Q FREESCALE [Freescale Semiconductor, Inc], MC9S12Q Datasheet - Page 120

• Manufacturer Part Number: MC9S12Q
• Description: Microcontrollers
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Chapter 3 Module Mapping Control (MMCV4) Block Description
120
ROM_SW[1:0]
PAG_SW[1:0]
Field
7:6
1:0
Allocated System FLASH or ROM Physical Memory Space — The allocated system FLASH or ROM
physical memory space is as given in
Allocated Off-Chip FLASH or ROM Memory Space — The allocated off-chip FLASH or ROM memory space
size is as given in
As stated, the bits in this register provide read visibility to the system
memory space and on-chip/off-chip partitioning allocations defined at
system integration. The actual array size for any given type of memory
block may differ from the allocated size. Please refer to the device overview
chapter for actual sizes.
NOTES:
1. The ROMHM software bit in the MISC register determines the accessibility of the
FLASH/ROM memory space. Please refer to
(MEMSIZ1),” for a detailed functional description of the ROMHM bit.
pag_sw1:pag_sw0
Table 3-11. Allocated FLASH/ROM Physical Memory Space
rom_sw1:rom_sw0
00
01
10
11
Table
Table 3-12. Allocated Off-Chip Memory Options
00
01
10
11
Table 3-10. MEMSIZ0 Field Descriptions
3-12.
Table
Off-Chip Space
MC9S12Q128
876K bytes
768K bytes
512K bytes
Rev 1.09
NOTE
0K byte
3-11.
Description
Section 3.3.2.8, “Memory Size Register 1
Allocated FLASH
or ROM Space
48K bytes
64K bytes
16K bytes
0K byte
On-Chip Space
128K bytes
256K bytes
512K bytes
1M byte
(1)
(1)
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