參數資料
型號: W66910
文件頁數: 75/81頁
文件大?。?/td> 1058K
代理商: W66910
Data Sheet
W66910 PCI ISDN S/T-Controller
Publication Release Date:
Feb,2001
Revision 1.0
-75 -
Note
: The load capacitance C
L
depends on the crystal specification. The typical values are 33 to 47 pF.
External ocsillator input (XTAL1) clock characteristics
Parameter
Min.
Max.
Duty cycle
1:2
2:1
9.4 Preliminary Switching Characteristics
9.4.1 PCM Interface Timing
Note 1:
These drawings are not to scale.
Note 2 :
The frequency of PBCK is 1536 kHz which includes 24 channels of 64 kbps data. The PFCK1 and PFCK2 are located at
channel 1 and channel 2, each with a 8 x PBCK duration.
Detailed PCM timing
PFCK2
PBCK
PFCK1
PTXD
ta1
ta2
ta3
ta4
ta5
ta6
ta7
PBCK
(1.536MHz)
PFCK1
PFCK2
PTXD
PRXD
24 CHs
CH 1
CH 2
Port1
Port1
Port2
Port2
Port1
Port1
Port2
Port2
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