參數(shù)資料
型號(hào): ADSP2185
廠商: Analog Devices, Inc.
元件分類: 數(shù)字信號(hào)處理
英文描述: DSP Microcomputer
中文描述: DSP微機(jī)
文件頁(yè)數(shù): 20/32頁(yè)
文件大?。?/td> 289K
代理商: ADSP2185
ADSP-2185
REV. 0
–20–
Parameter
Min
Max
Unit
Memory Read
Timing Requirements
:
t
RDD
t
AA
t
RDH
RD
Low to Data Valid
A0-A13,
xMS
to Data Valid
Data Hold from
RD
High
0.5 t
CK
– 9 + w
0.75 t
CK
– 10.5 + w
ns
ns
ns
0
Switching Characteristics
:
t
RP
t
CRD
t
ASR
t
RDA
t
RWR
RD
Pulse Width
CLK OUT High to
RD
Low
A0–A13,
xMS
Setup before
RD
Low
A0–A13,
xMS
Hold after
RD
Deasserted
RD
High to
RD
or
WR
Low
0.5 t
CK
– 5 + w
0.25 t
CK
– 5
0.25 t
CK
– 6
0.25 t
CK
– 3
0.5 t
CK
– 5
ns
ns
ns
ns
ns
0.25 t
CK
+ 7
w = wait states
×
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 17. Memory Read
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