Intel 8XC196Lx Manuale Utente
8XC196L
X SUPPLEMENT
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 8XC196Lx and
8XC196Kx.
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 8XC196Lx and
8XC196Kx.
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
7FH (Note)
3FH (Note)
1FH (Note)
1FC0H
7EH
1FA0H
7DH
3EH
1F80H
7CH
1F60H
7BH
3DH
1EH
1F40H
7AH
1F20H
79H
3CH
1F00H
78H
CAN Peripheral SFRs (87C196CA Only)
1EE0H
77H
3BH
1DH
1EC0H
76H
1EA0H
75H
3AH
1E80H
74H
1E60H
73H
39H
1CH
1E40H
72H
1E20H
71H
38H
1E00H
70H
Register RAM (87C196JV Only)
1DE0H
6FH
37H
1BH
1DC0H
6EH
1DA0H
6DH
36H
1D80H
6CH
1D60H
6BH
35H
1AH
1D40H
6AH
1D20H
69H
34H
1D00H
68H
NOTE:
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.
window. Reading these locations through a window returns FFH; writing these locations
through a window has no effect.