Figure-39 REFB Output Options in Normal Op" />
參數(shù)資料
型號: IDT82P2521BHG
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 108/147頁
文件大?。?/td> 0K
描述: IC LIU E1 21+1CH SHORT 640-PBGA
標準包裝: 5
類型: 線路接口裝置(LIU)
規(guī)程: E1
電源電壓: 3.135 V ~ 3.465 V
安裝類型: 表面貼裝
封裝/外殼: 640-BGA 裸露焊盤
供應(yīng)商設(shè)備封裝: 640-PBGA-EP(31x31)
包裝: 托盤
其它名稱: 82P2521BHG
IDT82P2521
21(+1) CHANNEL HIGH-DENSITY E1 LINE INTERFACE UNIT
Functional Description
63
December 7, 2005
Figure-39 REFB Output Options in Normal Operation
Figure-40 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
REFH = 1 ?
Yes
No
Output on REFA is free
running (locked to MCLK).
The frequency is 2.048 MHz.
REFH = 1 ?
Yes
No
Note *: '000' and '011' are reserved for FREQ[2:0] when REFA is free running.
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