mc9s12c32mpb16 Freescale Semiconductor, Inc, mc9s12c32mpb16 Datasheet - Page 124

• Manufacturer Part Number: mc9s12c32mpb16
• Description: Hcs12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3 Module Mapping Control (MMCV4) Block Description
unimplemented locations within the register space or to locations that are removed from the map (i.e., ports
A and B in expanded modes) will not cause this signal to become active. When the EMK bit is clear, this
pin is used for general purpose I/O.
3.4.3
The HCS12 core architecture limits the physical address space available to 64K bytes. The program page
index register allows for integrating up to 1M byte of FLASH or ROM into the system by using the six
page index bits to page 16K byte blocks into the program page window located from 0x8000 to 0xBFFF
in the physical memory space. The paged memory space can consist of solely on-chip memory or a
combination of on-chip and off-chip memory. This partitioning is configured at system integration through
the use of the paging configuration switches (pag_sw1:pag_sw0) at the core boundary. The options
available to the integrator are as given in
easy reference).
Based upon the system configuration, the program page window will consider its access to be either
internal or external as defined in
124
Memory Expansion
The partitioning as defined in
memory space and the actual on-chip memory sizes implemented in the
system may differ. Please refer to the device overview chapter for actual
sizes.
pag_sw1:pag_sw0
pag_sw1:pag_sw0
00
01
10
11
00
01
10
11
Table 3-17. External/Internal Page Window Access
Table 3-16. Allocated Off-Chip Memory Options
Table
MC9S12C-Family / MC9S12GC-Family
876K off-Chip,
128K on-Chip
768K off-chip,
512K off-chip,
256K on-chip
512K on-chip
Partitioning
0K off-chip,
1M on-chip
3-17.
Table 3-16
Table 3-17
Off-Chip Space
876K bytes
768K bytes
512K bytes
Rev 01.23
NOTE
0K byte
(this table matches
0x0038–0x003F
0x0000–0x002F
0x0030–0x003F
0x0000–0x001F
0x0020–0x003F
0x0000–0x003F
0x0000–0x0037
PIX5:0 Value
applies only to the allocated
N/A
Table 3-12
On-Chip Space
Page Window
128K bytes
256K bytes
512K bytes
External
External
External
External
1M byte
Access
Internal
Internal
Internal
Internal
but is repeated here for
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