Intel 8XC251SA - Page 217

13-9
EXTERNAL MEMORY INTERFACE
Figure 13-8. External Code Fetch (Nonpage Mode, One RD#/PSEN# Wait State)
Figure 13-9. External Data Write (Nonpage Mode, One WR# Wait State)
P0
A17/A16/P2
ALE
RD#/PSEN#
State 1 State 2
XTAL
State 3
A2812-04
A7:0
D7:0
A17/A16/A15:8
P0
A17/A16/P2
ALE
WR#
State 1 State 2
XTAL
State 3
A4174-02
A7:0
D7:0
A17/A16/A15:8
State 4