參數(shù)資料
型號: μPD98402A
廠商: NEC Corp.
元件分類: 通信及網(wǎng)絡(luò)
英文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
中文描述: Ultraframer DS3/E3/DS2/E2/DS1/E1/DS0
文件頁數(shù): 15/26頁
文件大?。?/td> 178K
代理商: ΜPD98402A
μ
PD98402A
15
AC Characteristics
(1) Management Interface
Internal Register Read/Write
Parameters
Symbol
Conditions
MIN.
TYP.
MAX.
Unit
A0-A5 setup time (to CE
)
t
SCC1
5
ns
R/W setup time (to CE
)
t
SCC2
5
A0-A5 hold time (to CE
)
t
HCC1
3
ns
R/W hold time (to CE
)
t
HCC2
3
CE
↓→
ACK
delay time (read)
t
DCNAR
Load capacitor 15 pF
At parallel data input
3
×
t
CYPPR
4.5
×
t
CYPPR
ns
Load capacitor 15 pF
At serial data input
3
×
4.5
×
(t
CYPSR
×
8)
(t
CYPSR
×
8)
CE
↓→
ACK
delay time (write)
t
DCNAW
Load capacitor 15 pF
At parallel data input
2
×
t
CYPPR
3.5
×
t
CYPPR
ns
Load capacitor 15 pF
At serial data input
2
×
3.5
×
(t
CYPSR
×
8)
(t
CYPSR
×
8)
CE
↑→
ACK
delay time
t
DCPA
Load capacitor 15 pF
At parallel data input
1
×
t
CYPPR
2.5
×
t
CYPPR
ns
Load capacitor 15 pF
At serial data input
1
×
2.5
×
(t
CYPSR
×
8)
(t
CYPSR
×
8)
CE
↓→
data output delay time
t
DCD
Load capacitor 15 pF
At parallel data input
2
×
t
CYPPR
3.5
×
t
CYPPR
ns
Load capacitor 15 pF
At serial data input
2
×
3.5
×
(t
CYPSR
×
8)
(t
CYPSR
×
8)
OE
↓→
data output delay time
t
DOD
Load capacitor 15 pF
9.4
ns
OE
↑→
data floating output delay time
t
FOD
Load capacitor 15 pF
10
ns
D0-D7 setup time (to CE
)
t
SDC
5
ns
D0-D7 hold time (to CE
)
t
HCD
3
ns
CE low-level width
t
CEBW
At parallel data input
3.5
×
t
CYPPR
ns
At serial data input
3.5
×
(t
CYPSR
×
8)
OE low-level width
t
OEBW
At parallel data input
2.5
×
t
CYPPR
ns
At serial data input
2.5
×
(t
CYPSR
×
8)
Remarks 1.
For t
CYPPR
, refer to
(6) PMD parallel interface timing
.
For t
CYPSR
, refer to
(7) PMD serial interface timing
.
2.
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