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STC5455 датащи(PDF) 36 Page - Connor-Winfield Corporation

номер детали STC5455
подробное описание детали  Synchronous Clock for SETS
PDF  56 Pages
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производитель  CONNOR-WINFIELD [Connor-Winfield Corporation]
домашняя страница  http://www.conwin.com
Logo CONNOR-WINFIELD - Connor-Winfield Corporation

STC5455 датащи(HTML) 36 Page - Connor-Winfield Corporation

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TM121
Rev:P1.3
Date: October 24, 2011
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
STC5455
Synchronous Clock for SETS
Data sheet
Preliminary
When manual reference selection mode is selected:
Selects the reference or set to freerun/holdover/pseudo-holdover.
When hard-wired manual reference selection mode is selected:
The register is read only and indicates the current reference defined by pin SRCSW and the register Hard-
wired_Switch_Pre_Selection.
Default value: 0
Selected_Ref, 0x24 (R)
Indicates the current selected reference or operation mode.
Device_Holdover_History, 0x25 (R)
The accumulated device holdover history relative to MCLK. 2’s complement. Resolution is 0.745x10-3 ppb.
Bit 3 ~ Bit 0
Selection
0
Freerun
1 ~ 5
Sync with Ref 1 ~ Ref 5
6 ~ 12
Reserved
13
Holdover
14
Pseudo-Holdover
15
Reserved (for T0); Lock to T0 (for T4)
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x24
Not used
Current selected reference
Field Value
Current selected reference
0
Freerun
1~5
Sync with Ref 1 ~ Ref 5
6 ~ 12
Reserved
13
Holdover
14
Pseudo-Holdover
15
Reserved (for T0); Lock to T0 (for T4)
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
0x25
Bits 0 - 7 of 32 bit Device Holdover History
0x26
Bits 8 - 15 of 32 bit Device Holdover History
0x27
Bits 16 - 23 of 32 bit Device Holdover History
0x28
Bits 24 - 31 of 32 bit Device Holdover History



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