参数资料
型号: SM3-19.44M
厂商: Connor-Winfield
文件页数: 20/36页
文件大小: 0K
描述: IC MOD TIMING 19.440MHZ STATUM 3
标准包装: 1
系列: SM3
类型: 定时模块,系统时钟
PLL:
主要目的: 以太网,ADM,DSLAM,SONET/SDH,Stratum,TDM
输入: LVCMOS
输出: LVCMOS
电路数: 1
比率 - 输入:输出: 4:3
差分 - 输入:输出: 无/无
频率 - 最大: 19.44MHz
电源电压: 3.135 V ~ 3.465 V
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 32-DIP 模块
包装: 管件
其它名称: CW642
SM3 19.44M
SM319.44M
SM3 Data Sheet #:
TM052
Page 27 of 36 Rev: 06 Date: 01/26/11
Copyright 2011 The Connor-Winfield Corp. All Rights Reserved
Specifications subject to change without notice
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
Application Notes continued
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