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IDT82P2821 bảng dữ liệu(PDF) 64 Page - Renesas Technology Corp

tên linh kiện IDT82P2821
Giải thích chi tiết về linh kiện  21(1) Channel High-Density T1/E1/J1 Line Interface Unit
PDF  152 Pages
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nhà sản xuất  RENESAS [Renesas Technology Corp]
Trang chủ  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

IDT82P2821 bảng dữ liệu(HTML) 64 Page - Renesas Technology Corp

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IDT82P2821
21(+1) CHANNEL HIGH-DENSITY T1/E1/J1 LINE INTERFACE UNIT
Functional Description
64
February 6, 2009
Figure-41 REFB Output Options in Normal Operation
Figure-42 REFA Output in LLOS Condition (When RCLKn Is Selected)
Recovered clock of one
of the 22 channels
JA_BYPAS = 1 ?
No
Clock is derived from the
output of RJA
Clock is derived from the output
of Rx Clock & Data Recovery
Yes
CLKB input
selected by REFB[4:0]
Output on REFB
In LLOS condition.
FS_BYPAS = 1 ?
No
Pass through a
Frequency Synthesizer.
FREE = 1 ?
Output on REFA is free
running (locked to MCLK).
The frequency is
programmed in FREQ[2:0] *.
Output high level.
No
Yes
Yes
REFH = 1 ?
Yes
No
Output on REFA is free
running (locked to MCLK).
The frequency is 1.544 MHz
in T1 mode or 2.048 MHz in
E1 mode.
REFH = 1 ?
Yes
No
Note *: '000' and '011' are reserved for FREQ[2:0] when REFA is free running.



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