CS4923/4/5/6/7/8/9
3.3V
8
ADDR[7:0]
ADDR[15:8]
EMAD[7:0]
D
Q
ADDR[7:0] DATA[7:0]
ADDR[15:8]
3.3V
8 BIT
'574
DFF
D
Q
8 BIT
'574
DFF
CS4923/4/5/6/7/8/9
EMOE
EXTMEM
E M W R
OE
64K X 8
ROM
CS
3.3V
3.3V
Only one of R1 and R2 should be stuffed.
Only one of R3 and R4 should be stuffed.
The state of EMOE and EMWR at the
rising edge of RESET will determine the
serial mode that the part comes up in
while using external memory. Please see
section 2, Serial Communication for
more details.
R1
R2
R3
R4
Figure 21. External Memory Interface
EXTMEM
EMOE
EMAD7:0
MA15:8
MA7:0
Data7:0
Figure 22. Run-Time Memory Access
42
DS262F2
CIRRUS [ CIRRUS LOGIC ]
