Example Of Connection With Memory; Connection Example Of Pd78054 And Memory - NEC PD78052 User Manual

22.4 Example of Connection with Memory

This section provides PD78054 and external memory connection examples in Figure 22-8. SRAMs are used as
the external memory in these diagrams. In addition, the external device expansion function is used in the full-address
mode, and the address from 0000H to 7FFFH (32 Kbytes) are allocated for internal ROM, and the addresses after
8000H for SRAM.
Figure 22-8. Connection Example of PD78054 and Memory
PD78054
RD
WR
A8-A14
ASTB
AD0-AD7
CHAPTER 22 EXTERNAL DEVICE EXPANSION FUNCTION
V
V
DD DD
PD74HC573
LE
Q0-Q7
D0-D7
OE
PD43256B
CS
OE
WE
I/O1-I/O8
A0-A14
Address
Bus
Data
Bus
523