CS493263-CL 查看數據表（PDF） - Cirrus Logic

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CS493263-CL

Multi-Standard Audio Decoder Family

Cirrus Logic 

CS49300 Family DSP

3.3V

8

EMAD[7:0]

CS493XX

EMOE

EXTMEM

EMWR

ADDR[7:0]

DQ

ADDR[7:0] DATA[7:0]

3.3V

8 BIT

DQ

ADDR[14:8]

ADDR[14:8]

'574

8 BIT

DFF

'574

32K X 8

DFF

ROM/RAM

OE

CS

WE (RAM Only)

3.3V

R1

R2

3.3V

R3

R4

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.

Figure 30. External Memory Interface

EXTMEM

EMOE

EMWR

EMAD7:0

MA 23:16 MA15:8

MA7:0

Figure 31. External Memory Read (16-bit address)

Data7:0

EXTMEM

EMOE

EMWR

EMAD7:0

MA 23:16 MA15:8

MA7:0

Figure 32. External Memory Write (16-bit address)

Data7:0

DS339F7

53

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