
MB90570 Series
72
(3) Decode Address Spaces
Pin
name
CSA
Decode space
Number of
area bytes
Remarks
10
CS0
0
F00000H to FFFFFFH
1 Mbyte
Becomes active when the program ROM
area or the program vector is fetched.
0
1
F80000H to FFFFFFH
512 Kbyte
1
0
FE0000H to FFFFFFH
128 Kbyte
11
—
Disabled
CS1
0
E00000H to EFFFFFH
1 Mbyte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
0
1
F00000H to F7FFFFH
512 Kbyte
1
0
FC0000H to FDFFFFH
128 Kbyte
1
68FF80H to 68FFFFH
128 byte
CS2
0
003000H to 003FFFH
4 Kbyte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
0
1
FA0000H to FBFFFFH
128 Kbyte
1
0
68FF80H to 68FFFFH
128 byte
1
68FF00H to 68FF7FH
128 byte
CS3
0
F80000H to F9FFFFH
128 Kbyte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
0
1
68FF00H to 68FF7FH
128 byte
1
0
68FE80H to 68FEFFH
128 byte
11
—
Disabled
CS4
0
002800H to 002FFFH
2 Kbyte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
0
1
68FE80H to 68FEFFH
128 byte
10
—
Disabled
11
—
Disabled
CS5
0
68FF80H to 68FFFFH
128 byte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
01
—
Disabled
10
—
Disabled
11
—
Disabled
CS6
0
68FF00H to 68FF7FH
128 byte
Adapted to the data ROM and RAM areas,
and external circuit connection
applications.
01
—
Disabled
10
—
Disabled
11
—
Disabled
CS7
—
Disabled