Oki MSM80C154S Specification Sheet page 32

MSM80C154S/83C154S
(4) External data memory read cycle
ALE
PSEN
RD
INSTR
A0 to A7
PORT 0
IN
PORT 2 PCH
(5) External data memory write cycle
ALE
PSEN
WR
INSTR
A0 to A7
PORT 0
IN
A8 to A15
PORT 2
PCH
290
t
LHLL
t
t
AVLL
LLAX
A0 to A7
PCL Rr or DPL
t
AVWL
A8 to A15 PCH P2.0 to P2.7 DATA
t
LHLL
t
t
AVLL
A0 to A7
Rr or DPL
PCL
t
AVWL
A8 to A15 PCH P2.0 to P2.7 DATA
t
LLDV
t t
LLWL RLRH
t
RLDV
t
AZRL
DATA IN
t
AVDV
or A8 to A15 DPH
t t
LLWL WLWH
LLAX
t
QVWH
t
QVWX
DATA (ACC)
or A8 to A15 DPH
¡ Semiconductor
t
WHLH
t
RHDZ
t
RHDX
A0 to A7
PCL
A8 to A15 PCH
t
WHLH
t
WHQX
A0 to A7
PCL
A8 to A15 PCH