參數(shù)資料
型號: XRT73R06
廠商: Exar Corporation
英文描述: SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
中文描述: 六通道線路接口單元E3/DS3/STS-1
文件頁數(shù): 53/68頁
文件大?。?/td> 347K
代理商: XRT73R06
á
SIX CHANNEL E3/DS3/STS-1 LINE INTERFACE UNIT
XRT73R06
REV. 1.0.0
50
F
IGURE
37. S
YNCHRONOUS
μP I
NTERFACE
S
IGNALS
D
URING
P
ROGRAMMED
I/O R
EAD
AND
W
RITE
O
PERATIONS
T
ABLE
14: S
YNCHRONOUS
T
IMING
S
PECIFICATIONS
N
OTE
:
1. This timing parameter is based on the frequency of the synchronous clock (PCLK). To determine the access
time, use the following formula: (PCLK
period
* 2) + 5ns
S
YMBOL
P
ARAMETER
M
IN
M
AX
U
NITS
t
0
Valid Address to CS Falling Edge
0
-
ns
t
1
CS Falling Edge to RD Assert
0
-
ns
t
2
RD Assert to RDY Assert
-
35
ns, see note 1
NA
RD Pulse Width (t
2
)
40
-
ns
t
3
CS Falling Edge to WR Assert
0
-
ns
t
4
WR Assert to RDY Assert
-
35
ns, see note 1
NA
WR Pulse Width (t
4
)
40
-
ns
PCLK Period
15
ns
PCLK Duty Cycle
PCLK "High/Low" time
CS
Addr[7:0]
D[7:0]
RD
WR
RDY
Valid Data for Readback
Data Available to Write Into the LIU
READ OPERATION
WRITE OPERATION
t
0
t
0
t
1
t
4
t
2
t
3
Valid Address
Valid Address
PCLK
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