Toshiba TLCS-90 Series Data Book page 28

TOSHIBA
TMP 8048A/TMP 80 35A, TMP 8049A/TMP 80 39A
Program Address Data Address
Program Address
DBO - DB7
InSLruction
ALE
RD
(WR)
\
I
PSEN
\
I \
r
External Data Memory Access lnstt'uctio,n
Suggest we have two
dia~rams
n
Write
ALE
r \
Read
ALE
----1 \-------------------
BUS
BUS
§----<
Data
>--
\
,-
WR
\
,-
Fig. 6 Timing of Accessing External Data Memory
MCU48-18