Hitachi H8S/2633 Hardware Manual page 201

When RCTS is set to 1, the CAS signal timing differs when reading and writing, being asserted Ω
cycle earlier when reading.
Read
Write
Note: n=2 to 5
T
ø
A23 to A0
AS
CSn (RAS)
CAS, LCAS
HWR (WE)
RD
D15 toD0
CAS, LCAS
HWR (WE)
RD
D15 to D0
Figure 7-15 Basic Access Timing
T
p r
row
T T
c1 c2
column
RCTS= 0
RCTS= 1
175