![](http://datasheet.mmic.net.cn/30000/MC68HC11KS2VPU3_datasheet_2369690/MC68HC11KS2VPU3_250.png)
Technical Data
M68HC11K Family
250
Memory Expansion and Chip Selects
MOTOROLA
Memory Expansion and Chip Selects
Figure 11-15. Memory Expansion Example 1 — Memory Map for a Single
8-Kbyte Window with Eight Banks of External Memory
INTERNAL
(EP)ROM
$04000
BANK 0
XA[15:13] =
0:0:0
$0000
$1000
$4000
$6000
$A000
$FFFF
WINDOW 1
CHIP SELECT 1
PGAR = $07
XA[15:13]
MMWBR = $04
Window 1 @ $4000
Window 2 disabled
MMSIZ = $41
Window 1 = 8 Kbytes
Window 2 disabled
General-purpose chip select 1 based on
expanded address
CSCTL = $00
No I/O or program chip selects
GPCS1A = $00
General-purpose chip select 1 starting address = $00000
GPCS1C = $06
64 Kbyte range (8 x 8 K)
GPCS2A = $00
N/A
GPCS2C = $00
General-purpose chip select 2 disabled
27C512
MC68HC(7)11K
GPCS2
GPCS1
E
R/W
$05FFF
$14000
BANK 1
XA[15:13] =
0:0:1
$15FFF
$24000
BANK2
XA[15:13] =
0:1:0
$25FFF
$34000
BANK 3
XA[15:13] =
0:1:1
$35FFF
$44000
BANK 4
XA[15:13] =
1:0:0
$45FFF
$54000
BANK 5
XA[15:13] =
1:0:1
$55FFF
$64000
BANK6
XA[15:13] =
1:1:0
$65FFF
$74000
BANK 7
XA[15:13] =
1:1:1
$75FFF
EE/REG/RAM
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0
ADDR11
ADDR10
ADDR9
ADDR8
ADDR11
ADDR10
ADDR9
ADDR8
ADDR15
ADDR14
ADDR13
ADDR12
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
ADDR7
ADDR6
ADDR5
ADDR4
ADDR3
ADDR2
ADDR1
ADDR0
A7
A6
A5
A4
A3
A2
A1
A0
ADDR8
A8
ADDR11
ADDR10
ADDR9
A11
A10
A9
A12
ADDR12
XA15
XA14
XA13
A15
A14
A13
VSS
OE
CE
VCC
VDD
XA13
XA15
XA14
XA17
XA16
XA15
XA14
XA18
DATA7
DATA6
DATA5
DATA4
DATA3
DATA2
DATA1
DATA0
D7
D6
D5
D4
D3
D2
D1
D0