mc68hc11k4 Freescale Semiconductor, Inc, mc68hc11k4 Datasheet - Page 236

• Manufacturer Part Number: mc68hc11k4
• Description: Mc68hc11k1 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Memory Expansion and Chip Selects
11.3.2.3 Memory Mapping Window Base Register
Technical Data
236
Address: $0057
The memory mapping window base register (MMWBR) defines the
starting address of each of the two windows within the CPU 64-Kbyte
address range. The windows normally begin at a boundary related to
their size (an 8-Kbyte window can begin on any 8-Kbyte boundary,
beginning at $0000).
W2A[15:13] — Window 2 Base Address Bits
W1A[15:13] — Window Base 1 Address Bits
Figure 11-3. Memory Mapping Window Base Register (MMWBR)
Reset:
Read:
Write:
Selects the three most significant bits (MSB) of the base address for
memory mapping window 2. Refer to
Selects the three MSB of the base address for memory mapping
window 1. Refer to
Freescale Semiconductor, Inc.
WxA[15:13]
For More Information On This Product,
MSB Bits
Table 11-3. Memory Expansion Window Base Address
W2A15
Memory Expansion and Chip Selects
000
001
010
011
100
101
110
Bit 7
111
0
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W2A14
6
0
Table
W2A13
8 Kbytes
$A000
$C000
$E000
$0000
$2000
$4000
$6000
$8000
5
0
11-3.
4
0
0
Window Base Address
Table
W1A15
16 Kbytes
$C000
$C000
$0000
$0000
$4000
$4000
$8000
$8000
3
0
11-3.
W1A14
2
0
M68HC11K Family
W1A13
32 Kbytes
1
0
$0000
$0000
$4000
$4000
$8000
$8000
$8000
$8000
MOTOROLA
Bit 0
0
0