Hitachi SH7032 Hardware Manual page 170

Area 7: Area 7 is an area with address bits A26–A24 set to 111 and an address range of
H'7000000–H'7FFFFFF and H'F000000–H'FFFFFFF. Figure 8.10 shows a memory map of area 7.
Area 7 is allocated to external memory space when A27 is 0 and on-chip RAM space when A27 is
1. In external memory space, the bus width is 8 bits. The A23 and A22 bits are not output and the
shadow is in 4-Mbyte units. When external memory is accessed, the CS7 signal is valid.
The on-chip RAM space has a bus width of 32 bits. In the SH7032, the on-chip RAM capacity is 8
kbytes, so A23–A13 are ignored and the shadows are in 8-kbyte units. In the SH7034, the on-chip
RAM capacity is 4 kbytes, so A23–A12 are ignored and the shadows are in 4-kbyte units. During
on-chip RAM access, the CS7 signal is not valid.
Logical address
space
H'7000000
Shadow
H'73FFFFF
H'7400000
Shadow
H'77FFFFF
H'7800000
Shadow
H'7BFFFFF
H'7C00000
Shadow
H'7FFFFFF
8-bit space
H'F000FFF (SH7034)
H'F001FFF (SH7032)
Actual
space
External
memory
space
(4 Mbytes)
• Valid
addresses
A21–A0
(A23 and A22
not output)
• CS7 valid
H'FFFE000 (SH7032)
H'FFFF000 (SH7034)
Figure 8 10 Memory Map of Area 7
Logical address
space
H'F000000
Shadow
Shadow
Shadow
Shadow
Shadow
Shadow
H'FFFFFFF
32-bit space
Actual
space
• On-chip
RAM space
SH7032:
8 kbytes,
SH7034:
4 kbytes
• Valid
addresses
SH7032:
A12–A0
(A23–A13
not output)
SH7034:
A11–A0
(A23–A12
not output)
• CS7 not
valid
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