ADSP-2109 AD [Analog Devices], ADSP-2109 Datasheet - Page 31

• Manufacturer Part Number: ADSP-2109
• Description: Low Cost DSP Microcomputers
• Manufacturer: AD [Analog Devices]

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TIMING PARAMETERS (ADSP-2104L/ADSP-2109L)
MEMORY READ
Parameter
Timing Requirement:
t
t
t
Switching Characteristic:
t
t
t
t
t
w = wait states
RDD
AA
RDH
RP
CRD
ASR
RDA
RWR
RD Low to Data Valid
A0–A13, PMS, DMS, BMS to Data Valid
Data Hold from RD High
RD Pulse Width
CLKOUT High to RD Low
A0–A13, PMS, DMS, BMS Setup before RD Low
A0–A13, PMS, DMS, BMS Hold after RD Deasserted
RD High to RD or WR Low
t
CK.
DMS, PMS
CLKOUT
A0 – A13
BMS
RD
WR
D
Figure 28. Memory Read
t
CRD
t
ASR
–31–
t
AA
Min
0
28.2
13.1
8.1
9.1
31.2
13.824 MHz
t
RDD
t
RP
Max
23.2
36.2
28.1
t
RDA
0.5t
0.25t
0.5t
Min
0
0.25t
0.25t
t
RDH
ADSP-2104/ADSP-2109
Dependency
t
Frequency
CK
CK
RWR
CK
CK
CK
– 8 + w
– 5
– 5
– 10
– 9
Max
0.5t
0.75t
0.25t
CK
CK
CK
– 13 + w
– 18 + w
+ 10
Unit
ns
ns
ns
ns
ns
ns
ns
ns