Adsp-2181, Adsp-2183 – Analog Devices ADSP-2181 User Manual
Page 23
ADSP-2181/ADSP-2183
REV. 0
–23–
ADSP-2181
Parameter
Min
Max
Unit
Memory Read
Timing Requirements:
t
RDD
RD
Low to Data Valid
0.5t
CK
– 9 + w
ns
t
AA
A0-A13, xMS to Data Valid
0.75t
CK
– 10.5 + w
ns
t
RDH
Data Hold from RD High
0
ns
Switching Characteristics:
t
RP
RD
Pulse Width
0.5t
CK
– 5 + w
ns
t
CRD
CLKOUT High to RD Low
0.25t
CK
– 5
0.25t
CK
+ 7
ns
t
ASR
A0-A13, xMS Setup before RD Low
0.25t
CK
– 6
ns
t
RDA
A0-A13, xMS Hold after RD Deasserted
0.25t
CK
– 3
ns
t
RWR
RD
High to RD or WR Low
0.5t
CK
– 5
ns
ADSP-2183
28.8 MHz
Parameter
Min
Max
Unit
Memory Read
Timing Requirements:
t
RDD
RD
Low to Data Valid
0.5t
CK
– 9 + w
ns
t
AA
A0-A13, xMS to Data Valid
0.75t
CK
– 12.5 + w
ns
t
RDH
Data Hold from RD High
0
ns
Switching Characteristics:
t
RP
RD
Pulse Width
0.5t
CK
– 5 + w
ns
t
CRD
CLKOUT High to RD Low
0.25t
CK
– 5
0.25t
CK
+ 7
ns
t
ASR
A0-A13, xMS Setup before RD Low
0.25t
CK
– 6
ns
t
RDA
A0-A13, xMS Hold after RD Deasserted
0.25t
CK
– 3
ns
t
RWR
RD
High to RD or WR Low
0.5t
CK
– 5
ns
w = wait states x t
CK
xMS
= PMS, DMS, CMS, IOMS, BMS
CLKOUT
A0 – A13
D
t
RDA
t
RWR
t
RP
t
ASR
t
CRD
t
RDD
t
AA
t
RDH
DMS
,
PMS,
BMS
,
IOMS,
CMS
RD
WR
Figure 25. Memory Read