MB91401
55
(3) Normal memory access
Note : tcycp is external memory clock cycle period.
Parameter
Symbol
Pin
Typical timing
Value
Unit
Remarks
Min
Max
Address delay time
tchav
A23 to A0
MCLKO
↑
0
tcycp
/
2
+
7
ns
CSX delay time
tchcsl
CSX2 to CSX0
MCLKO
↑
0
tcycp
/
2
+
7
ns
CSX delay time
tchcsh
CSX2 to CSX0
MCLKO
↑
0
tcycp
/
2
+
7
ns
WRX delay time
tchwrl
WRX3 to WRX0
MCLKO
↑
−
1
9
ns
WRX delay time
tchwrh
WRX3 to WRX0
MCLKO
↑
−
1
9
ns
Data delay time
tchdv
D31 to D0
MCLKO
↑
0
tcycp
/
2
+
7
ns
RDX delay time
tchrdl
RDX
MCLKO
↑
−
1
9
ns
RDX delay time
tchrdh
RDX
MCLKO
↑
−
1
9
ns
Data setup
tdsrh
D31 to D0
MCLKO
↑
19
ns
Data hold
trhdx
D31 to D0
MCLKO
↑
−
1
ns
tcycp
tchav
tchcsl
tchwrl
tchdv
tchrdl
tdsrh
tchrdh
tchwrh
tchcsh
trhdx
MCLKO
A23 to A0
CSX2 to CSX0
WRX3 to WRX0
D31 to D0
RDX
D31 to D0