user manual

13-13
EXTERNAL MEMORY INTERFACE
Figure 13-12. External Code Fetch/Data Read (Nonpage Mode, RT Wait State)
Figure 13-13. External Data Write (Nonpage Mode, RT Wait State)
A0-A7
WCLK
ALE
RD#/PSEN#
WAIT#
P0
P2
A8-A15
A5007-01
State 1 State 2 State 3 State 1 (next cycle)
A0-A7D0-D7 stretched
A8-A15 stretched
RD#/PSEN# stretched
A0-A7
WCLK
ALE
WR#
WAIT#
P0
P2
A5009-01
State 1 State 2 State 3 State 4
D0-D7
stretched
A8-A15 stretched
WR# stretched