參數(shù)資料
型號: 8XC196LX
英文描述: 8XC196Lx - 8XC196Lx Supplement to 8X196Kx. 8X196Jx. 87C196CA User's Manual
中文描述: 8XC196Lx - 8XC196Lx補編8X196Kx。 8X196Jx。 87C196CA用戶手冊
文件頁數(shù): 30/136頁
文件大?。?/td> 659K
代理商: 8XC196LX
8XC196LXSUPPLEMENT
3-6
3.4
WINDOWING
Windowing maps a segment of higher memory (the upper register file or peripheral SFRs) into
the lower register file. The window selection register (WSR) selects a 32-, 64- or 128-byte seg-
ment of higher memory to be windowed into the top of the lower register file space. Table 3-4
lists the WSR values for windowing the upper register file for both the 8XC196L
x
and
8XC196K
x
.
Table 3-4. Windows
Base
Address
WSR Value
for 32-byte Window
(00E0–00FFH)
WSR Value
for 64-byte Window
(00C0–00FFH)
WSR Value for
128-byte
Window
(0080–00FFH)
Peripheral SFRs
1FE0H
1FC0H
1FA0H
1F80H
1F60H
1F40H
1F20H
1F00H
7FH (Note)
7EH
7DH
7CH
7BH
7AH
79H
78H
3FH (Note)
1FH (Note)
3EH
3DH
1EH
3CH
CAN Peripheral SFRs (87C196CA Only)
1EE0H
1EC0H
1EA0H
1E80H
1E60H
1E40H
1E20H
1E00H
77H
76H
75H
74H
73H
72H
71H
70H
3BH
1DH
3AH
39H
1CH
38H
Register RAM (87C196JV Only)
1DE0H
1DC0H
1DA0H
1D80H
1D60H
1D40H
1D20H
1D00H
NOTE:
6FH
6EH
6DH
6CH
6BH
6AH
69H
68H
37H
1BH
36H
35H
1AH
34H
Locations 1FE0–1FFFH contain memory-mapped SFRs that cannot be accessed through a
window. Reading these locations through a window returns FFH; writing these locations
through a window has no effect.
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