CS49300 Family DSP
3.3V
8
ADDR[7:0]
EMAD[7:0]
D
Q
ADDR[7:0] DATA[7:0]
ADDR[14:8]
ADDR[14:8]
3.3V
8 BIT
'574
DFF
D
Q
8 BIT
'574
DFF
32K X 8
CS493XX
ROM/RAM
EMOE
EXTMEM
E M W R
OE
CS
WE (RAM Only)
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 30. External Memory Interface
EXTMEM
EMOE
EMWR
EMAD7:0
MA15:8
MA7:0
Data7:0
MA 23:16
Figure 31. External Memory Read (16-bit address)
EXTMEM
EMOE
EMWR
MA15:8
MA7:0
Data7:0
MA 23:16
EMAD7:0
Figure 32. External Memory Write (16-bit address)
DS339PP4
51
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