Hitachi SH7032 - Page 163

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Logical address space
H'B000000
H'3000000
 Actual space
Area
accessible
with A21–A0
4 Mbytes
Shadow
(A23, A22 = 00)
Shadow
(A23, A22 = 01)
Shadow
(A23, A22 = 10)
Shadow
(A23, A22 = 11)
H'B3FFFFF
H'B400000
H'3400000
H'B7FFFFF
H'B800000
H'BBFFFFF
H'BC00000
H'BFFFFFF
H'3800000
H'3C00000
16-bit space
8-bit space
H'33FFFFF
H'37FFFFF
H'3BFFFFF
Actual space
Location actually
accessed
Logical address space
Location indicated
by address
Location indicated
by address
Location indicated
by address
Location indicated
by address
8-bit space
H'3000000
H'3200000
H'33FFFFF
H'3400000
H'3600000
H'3A00000
H'3E00000
H'37FFFFF
H'3800000
H'3BFFFFF
H'3C00000
H'3FFFFFF
a. Shadow allocation
b. Actual space accessed when addresses are specified
H'3FFFFFF
Figure 8.4 Shadows