Toshiba TLCS-90 Series Data Book page 132

TOSHIBA
n1t'
8048PI,
TMP
8035PI
Program Address
Data Address Program Address
DBO - DB7
In~tructior
ALE
RD (WR)
\
I
PSEN
\
I
\
r
External Data Memory Access Instruction
Suggest we have diagrams
BUS
----~~~----~(
Data
~
BUS
-----~~
Data
~
\~----
WR
\'-------11
Fig.6 Timing of Accessing External Data Memory
MCU48-122