ADSP-2185
Parameter
Memory Read
Timing Requirements:
t
RDD
RD
Low to Data Valid
t
AA
A0-A13,
xMS
to Data Valid
t
RDH
Data Hold from
RD
High
Switching Characteristics:
RD
Pulse Width
t
RP
t
CRD
CLKOUT High to
RD
Low
t
ASR
A0鈥揂13,
xMS
Setup before
RD
Low
t
RDA
A0鈥揂13,
xMS
Hold after
RD
Deasserted
t
RWR
RD
High to
RD
or
WR
Low
w = wait states
脳
t
CK
xMS
=
PMS, DMS, CMS, IOMS, BMS
Min
Max
Unit
0.5 t
CK
鈥?9 + w
0.75 t
CK
鈥?10.5 + w
0
0.5 t
CK
鈥?5 + w
0.25 t
CK
鈥?5
0.25 t
CK
鈥?6
0.25 t
CK
鈥?3
0.5 t
CK
鈥?5
ns
ns
ns
ns
ns
ns
ns
ns
0.25 t
CK
+ 7
CLKOUT
A0鈥揂13
DMS, PMS,
BMS, IOMS,
CMS
t
RDA
RD
t
ASR
t
CRD
D
t
RP
t
RWR
t
AA
WR
t
RDD
t
RDH
Figure 17. Memory Read
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