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Section 6 Bus Controller (BSC)
Address bus
IOS (IOSE = 1)
CS256 (CS256E = 1)
AS (IOSE = 0)
*
D15 to D8
Read
D7 to D0
Write
D15 to D8
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 6.12 Bus Timing for 16-Bit, 3-State Access Space (Word Access)
Rev. 1.00 Mar. 12, 2008 Page 136 of 1178
REJ09B0403-0100
T
1
φ
RD
HWR
LWR
Bus cycle
T
T
2
3
Valid
Valid
Valid
Valid
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