Hitachi H8S/2678 Series Reference Manual page 150

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Address bus
CSn
AS
RD
D15 to D8
Read
D7 to D0
HWR
LWR
Write
D15 to D8
D7 to D0
Notes: 1. n = 0 to 7
2. When RDNn = 0
Figure 4.16 Bus Timing for 16-Bit, 3-State Access Space (3)
Bus cycle
T T
1 2
(Word Access)
T
3
Valid
Valid
Valid
Valid
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