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(d)
Glueless Extension
Setting the OBE bit in PTCNT0 selects glueless extension, which uses the RD, WR, HBE, and
LBE signals to allow connection to the external space without adding an external circuit.
Table 6.2
Address Ranges and External Address Spaces
Address Range
H'080000 to H'F7FFFF
(15 Mbytes)
H'F80000 to H'FBFFFF
(256 Kbytes)
256-Kbyte extended area
H'FC0000 to H'FEFFFF
(192 Kbytes)
H'FF0800 to H'FFBFFF
(46 Kbytes)
H'FFC000 to H'FFDFFF
(8 Kbytes)
H'FFE000 to H'FFE07F
(128 bytes)
H'FFE080 to H'FFEFFF
(3968 bytes)
H'FFF000 to H'FFF7FF
(2 Kbytes)
H'FFFF00 to H'FFFF7F
(128 bytes)
[Legend]
:
This address range is unconditionally accessed as the basic extended area.
∆:
Condition for making this address range accessed as the basic extended area.
:
This address range cannot be used as part of a 256-Kbyte extended area.
Basic Extended Area
: No condition
∆: When CS256E = 0, used as
basic extended area.
: No condition
∆: When RAME = 0, used as
basic extended area.
: No condition
: No condition.
∆: When RAME = 0, used as
basic extended area.
No condition
When IOSE = 1, IOS is
output and address pins A10
to A0 are used.
∆ When RAME = 0, used as
basic extended area.
Section 6 Bus Controller (BSC)
Area
256-Kbyte Extended Area
When WAIT pin function is not
selected while CS256E = 1,
CS256 is output and address
pins A17 to A0 are used.
Rev. 1.00 Mar. 12, 2008 Page 117 of 1178
REJ09B0403-0100
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