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STL-S3 датащи(PDF) 8 Page - Connor-Winfield Corporation |
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STL-S3 датащи(HTML) 8 Page - Connor-Winfield Corporation |
8 / 24 page Preliminary Data Sheet #: TM055 Page 8 of 24 Rev: P00 Date: 5/17/04 © Copyright 2004 The Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice Manual Mode During manual operation, the mode of operation is determined by the user through either the external control pins CNTRL3:1 or internal configuration bits CF3:1 (see Table 7). The default configuration is to have external control, but this can be changed to internal control by setting the INT bit in the memory-mapped registers via the SPI port. During manual operation, the user can select Free Run, Hold Over, or locked operation. Any of the six input references can be selected for the unit to track. If the module is locked to a reference and that reference becomes disqualified, the module will automatically go into Hold Over. If the module has been phase-locked to the current reference for at least 50 seconds and is in the final stage of the filter (as indicated in register 0Eh), the Hold Over value will be derived from the data from the current reference. If the module has been phase-locked to the current reference for less than 50 seconds, then the last valid Hold Over value will be used. If the control bits/pins remain in the same selection that caused the unit to go into Hold Over, the unit will remain in Hold Over until the reference is re-qualified. At that time, after a minimum 10s soak time, the unit will attempt to relock to the same reference. If the external user control pins select a new reference that the module has not qualified, the module will switch into the last valid Hold Over value. If the module has not yet established a valid Hold Over, the module will return to the pre-programmed Free Run value. As soon as the module qualifies the selected reference, it will begin the locking process. At no time during manual mode will the unit attempt to lock to a reference that is not selected by the external pins/internal bits. The only mode that the unit will enter automatically is into Hold Over or Free Run, and that is due to a disqualification of the selected reference. Fast Acquisition Lock Free Run Hold Over User selects Hold Over Use r sele cts Free Run or resets Hold Ove r h ist or y sq ua lifi ed Us er se le cts Hold O ve r or ac tiv e ref ere nce is disq ualifie d Use rs elec tsF reeR un or ac tiv e ref ere nce is disqu alifi ed and there is no va lid H oldO ve r h istor y Manual Mode State Diagram Figure 4 |
Аналогичный номер детали - STL-S3 |
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Аналогичное описание - STL-S3 |
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