參數(shù)資料
型號: SM3E-19.44M
廠商: Connor-Winfield
文件頁數(shù): 20/36頁
文件大?。?/td> 0K
描述: IC MOD TIMING 19.440MHZ STRAT 3E
標(biāo)準(zhǔn)包裝: 1
系列: SM3
類型: 定時模塊,系統(tǒng)時鐘
PLL:
主要目的: 以太網(wǎng),ADM,DSLAM,SONET/SDH,Stratum,TDM
輸入: LVCMOS
輸出: LVCMOS
電路數(shù): 1
比率 - 輸入:輸出: 8:3
差分 - 輸入:輸出: 無/無
頻率 - 最大: 19.44MHz
電源電壓: 3.135 V ~ 3.465 V
工作溫度: 0°C ~ 70°C
安裝類型: 通孔
封裝/外殼: 32-DIP 模塊
包裝: 管件
其它名稱: CW643
SM3E 19.44M
SM3E19.44M
SM3E Data Sheet #:
TM054
Page 27 of 36 Rev: 04 Date: 01/26/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
Application Notes continued
Hold Over History access and Control Registers
Table 5
Register
Register Name
Description
0x25
History_Policy
SetspolicyforHoldOverhistoryaccumulation:“Rebuild”or“Continue”
0x26
History_Cmd
Save,restore,andflushcommandsforHoldOverhistory
0x27
Holdover_Time
IndicatesthetimesinceenteringtheHoldOverstate
0x11
DPLL_Status
Bits3and4:HoldOverAvailable”and“HoldOverBuildComplete”
Build History
Hold Control = 0
Hold Available = 0
Acquire Reference
Hold Control = 0
Hold Available = 0
Locked, History
Complete
Hold Control =1
Hold Available = 1
Acquire Reference
Hold Control = 0
Hold Available = 1
Build History
Hold Control = 0
Hold Available = 1
Reference Switch
Reference Lock
(with "Continue" set)
Reference Lock
(with "Rebuild" set)
Reference Lock
Flush
History Build Complete
History Build
Complete,
Replace Active
Hold Over History
History Restored from backup,
re-start the building procedure.
Hold Over History and Status States
Figure 9
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