參數(shù)資料
型號(hào): ADSP-21MOD870-000
廠商: ANALOG DEVICES INC
元件分類: 調(diào)制器/解調(diào)器
英文描述: Internet Gateway Processor
中文描述: 56 kbps DATA, MODEM, PQFP100
封裝: METRIC, PLASTIC, TQFP-100
文件頁數(shù): 23/32頁
文件大?。?/td> 231K
代理商: ADSP-21MOD870-000
ADSP-21mod870
–23–
REV. 0
Parameter
Min
Max
Unit
Memory Write
Switching Characteristics
:
t
DW
t
DH
t
WP
t
WDE
t
ASW
t
DDR
t
CWR
t
AW
t
WRA
t
WWR
Data Setup before
WR
High
Data Hold after
WR
High
WR
Pulsewidth
WR
Low to Data Enabled
A0–A13,
xMS
Setup before
WR
Low
Data Disable before
WR
or
RD
Low
CLKOUT High to
WR
Low
A0–A13,
xMS
, Setup before
WR
Deasserted
A0–A13,
xMS
Hold after
WR
Deasserted
WR
High to
RD
or
WR
Low
0.5 t
CK
– 7 + w
0.25 t
CK
– 2
0.5 t
CK
– 5 + w
0
0.25 t
CK
– 6
0.25 t
CK
– 7
0.25 t
CK
– 5
0.75 t
CK
– 9 + w
0.25 t
CK
– 3
0.5 t
CK
– 5
ns
ns
ns
ns
ns
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
WP
t
AW
t
CWR
t
DH
t
WDE
t
DW
t
ASW
t
WWR
t
WRA
t
DDR
DMS
,
PMS
,
BMS
,
CMS
,
IOMS
RD
WR
Figure 25. Memory Write
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