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Section 6 Bus Controller (BSC)
Address bus
(A23 to A0)
CS
IOS (IOSE = 1)
CS256 (CS256E = 1)
AS*
HBE
LBE
Read
D15 to D8
D7 to D0
D15 to D8
Write
D7 to D0
Note:
* For external address space access, this signal is not output when the 256-Kbyte extended area
is accessed with CS256E = 1.
Figure 6.14 Glueless Extension Odd Byte Access (ADMXE = 0)
Rev. 1.00 Mar. 12, 2008 Page 138 of 1178
REJ09B0403-0100
φ
RD
WR
Bus cycle
Odd
High level
Invalid
Valid
Undefined
Valid
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