NEC µPD72257 Preliminary User's Manual page 303

External Memory Interface Controller
9.3.1.1
Caution
Figure 9-6
Static RAM and Flash read timing
Below diagram illustrates the read timing from static RAM or flash memory.
The read cycle time parameter MEMSMTMGRk.TRC defines the number of
system clocks of an entire read cycle.
Set the read cycle time parameter MEMSMTMGRk.TRC[5:0] one clock higher
than required by the connected memory.
HCLK
(internal)
MA[24:0]
MCSn
MSBEN
MSOE
H
MSWR
MD[31:0]
Static RAM and flash read timing
In the above diagram following timing parameter settings are used:
• MEMSMTMGRk.TRC = 2: 3 clocks for read
Preliminary User's Manual S19203EE1V3UM00
TRC
Address
Data
Chapter 9
303