Os motores de busca de Datasheet de Componentes eletrônicos
  Portuguese  ▼
ALLDATASHEETPT.COM

X  

SM3-019.44M Folha de dados(PDF) 9 Page - Connor-Winfield Corporation

Nome de Peças SM3-019.44M
Descrição Electrónicos  ULTRA MINIATURE STRATUM 3 MODULE
Download  36 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrônico  CONNOR-WINFIELD [Connor-Winfield Corporation]
Página de início  http://www.conwin.com
Logo CONNOR-WINFIELD - Connor-Winfield Corporation

SM3-019.44M Folha de dados(HTML) 9 Page - Connor-Winfield Corporation

Back Button SM3-019.44M Datasheet HTML 5Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 6Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 7Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 8Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 9Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 10Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 11Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 12Page - Connor-Winfield Corporation SM3-019.44M Datasheet HTML 13Page - Connor-Winfield Corporation Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 36 page
background image
Data Sheet #: TM052
Page 9 of 36
Rev: 03
Date: 11/07/08
© Copyright 2008 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Reference Input Quality Monitoring
Each reference input is monitored for signal presence and frequency offset. Signal presence for the Ref1-4 inputs is indicated in the
Ref_Activity register and signal presence for the M/S REF is indicated in bit 0 of the M/S REF_Activity register. The frequency offset
between the Ref1-4 inputs and the calibrated local oscillator is available in the Ref_Frq_Offset registers (4). Register Ref_Pullin_Sts
indicates, for each of the Ref1-4 inputs, if the reference is within the maximum pull-in range. The maximum pull-in range is indicated in
register Max_Pullin_Range, and may be set in 0.1ppm increments. Typically, it would be set according to the values specified by the
standards (GR-1244) appropriate for the particular stratum of operation.
The Ref_Qualified register contains the “anded” condition of the Ref_Activity and Ref_Pullin_Sts registers for each of the Ref1-4
inputs, qualified for 10 seconds. When a reference signal has been present for > 10 seconds and is within the pull-in range, it’s bit is set.
The Ref_Available register contains the “anded” condition of the Ref_Qualified register and the Ref_Mask register, and therefore
represents the availability of a reference for selection when automatic reference and operational mode selection is enabled.
Reference Input Selection, Frequencies, and Mode Selection
One of four reference input signals (Ref 1-4) are selected for synchronization in Master mode (as below in the Op_Mode register
description. 0x05). Ref1-4 may each be 8 kHz, 1.544 MHz, 2.048 MHz, 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz, 51.84 MHz or
77.76 MHz.
Reference frequencies are auto-detected (frequency determined by the chip) and the detected frequency can be read from the
Ref_Frq_Priority registers (See Register Descriptions and Operation section).
The M/S REF input for slave operation is frequency auto-detected and may be 8kHz, 1.544MHz, 2.048MHz, 12.96MHz, 19.44MHz,
25.92MHz, 38.88MHz, 51.84MHz or 77.76MHz. Signal presence and frequency for the M/S REF input is indicated in bits 0-3 of the M/S
REF_Activity register.
Active reference and operational mode selection may be manual or automatic, as determined by bit 1 in the Ctl_Mode register. In
manual mode, register writes to Op_Mode select the reference and mode. The reset default is manual mode.
In automatic mode, the reference is selected according to the priorities written to the four Ref_Frq_Priority registers. Individual
references may be masked for use/non-use according to the Ref_Mask register. A reference may only be selected if it is “available” - that
is, it is qualified, as indicated in the Ref_Qualified register, and is not masked (See Reference Input Quality Monitoring and Register
Descriptions and Operation sections).
Furthermore, Bit 3 of each Ref_Frq_Priority register will determine if that reference is revertive or non-revertive. When a reference
fails, the next highest priority “available” (signal present, non-masked, and acceptable frequency offset) reference will be selected. When
a reference returns, it will be switched to only if it is of higher priority and the current active reference is marked “Revertive”. Additionally,
the reversion is delayed according to the value written to the Ref_Rev_Delay register (From 0 to 255 minutes).
Detailed Description continued
Serial Interface Timing
Table 4
Symbol
Parameter
Minimum
Nominal
Maximum
Units
Notes
t
CS
SPI_Enable low to SPI_CLK low
15
-
-
ns
t
CH
SPI_CLK high time
25
-
-
ns
t
CL
SPI_CLK low time
25
-
-
ns
t
RWs
Read/Write setup time
15
-
-
ns
t
RWh
Read/Write hold time
15
-
-
ns
t
DRDY
Data ready
-
-
25
ns
t
HLD
Data Hold
15
-
-
ns
t
CSTRI
Chip Select to data tri-state
5
-
-
ns
t
CSMIN
Minimum delay between successive accesses300
-
-
ns
Note: The SPI port should not be accessed until 1200ms after reset has transitioned from low to a high state.


Nº de peça semelhante - SM3-019.44M

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Connor-Winfield Corpora...
SM3-8RG5 CONNOR-WINFIELD-SM3-8RG5 Datasheet
616Kb / 32P
   8 REFERENCE STRATUM 3 MODULE
logo
List of Unclassifed Man...
SM3-9WE ETC2-SM3-9WE Datasheet
124Kb / 4P
   Cable Marker
logo
Connor-Winfield Corpora...
SM3-ITG CONNOR-WINFIELD-SM3-ITG Datasheet
667Kb / 32P
   ULTRA MINIATURE STRATUM 3 MODULE
More results

Descrição semelhante - SM3-019.44M

Fabricante ElectrônicoNome de PeçasFolha de dadosDescrição Electrónicos
logo
Connor-Winfield Corpora...
SM3G CONNOR-WINFIELD-SM3G Datasheet
1Mb / 36P
   ULTRA MINIATURE STRATUM 3 MODULE
SM3-ITG CONNOR-WINFIELD-SM3-ITG Datasheet
667Kb / 32P
   ULTRA MINIATURE STRATUM 3 MODULE
SM3E CONNOR-WINFIELD-SM3E Datasheet
389Kb / 36P
   ULTRA MINIATURE STRATUM 3E MODULE
SM3E CONNOR-WINFIELD-SM3E_15 Datasheet
981Kb / 36P
   ULTRA MINIATURE STRATUM 3E MODULE
logo
EUROQUARTZ limited
YH1440 EUROQUARTZ-YH1440 Datasheet
84Kb / 1P
   Miniature Package - Stratum 3 Compliant
logo
Connor-Winfield Corpora...
MSTM-S3-IT3-19.44M CONNOR-WINFIELD-MSTM-S3-IT3-19.44M Datasheet
1Mb / 16P
   Stratum 3 Timing Module
MSTM-S3-T2F1 CONNOR-WINFIELD-MSTM-S3-T2F1 Datasheet
884Kb / 16P
   Stratum 3 Timing Module
STL-S3 CONNOR-WINFIELD-STL-S3 Datasheet
1Mb / 24P
   Stratum 3 Timing Module
MSTM-S3-TR CONNOR-WINFIELD-MSTM-S3-TR Datasheet
1Mb / 16P
   Stratum 3 Timing Module
MSTM-S3-IT3 CONNOR-WINFIELD-MSTM-S3-IT3 Datasheet
1Mb / 16P
   Stratum 3 Timing Module
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36


Folha de dados Download

Go To PDF Page


Ligação URL




Privacy Policy
ALLDATASHEETPT.COM
ALLDATASHEET é útil para você?  [ DONATE ] 

Sobre Alldatasheet   |   Publicidade   |   Contato conosco   |   Privacy Policy   |   roca de Link   |   Lista de Fabricantes
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com