SY10 Raltron, SY10 Datasheet - Page 6

• Manufacturer Part Number: SY10
• Manufacturer: Raltron

1) (FREERUN)
The path 1 runs until control signals (CNT1,2,3 pins or CON0,1,2,3 bits in CFG1 register) are set to zero or there is
no valid history available on the acquisition buffer for the holdover.
2) (FREERUN_ REFERENCE_SWITCHING)
The path 2 runs when there was any change at control signals.
3) (REFERENCE_SWITCHING_FREERUN)
The path 3 runs when the control signals were changed to zero – the free-run mode was selected.
4) (REFERENCE_SWITCHING)
The path 4 runs until appropriate reference was selected. If the unit is in Auto Switching mode (bit AUTOEN in
CFG2 register set to 1) the module will switch in the following conditions:
If the unit is in Manual Switching mode (bit AUTOEN in CFG2 register set to 0) the module will switch in following
conditions:
5) (FREQ&PHASE_LOCKING_FREERUN)
The path 5 runs when the control signals were changed to zero – the free-run mode was selected.
6) (HOLDOVER_FREERUN)
The path 6 runs when the control signals were changed to zero – the free-run mode was selected or there is no
valid history available on the acquisition buffer for the holdover.
7) (REFERENCE_SWITCHING_FREQ&PHASE_LOCKING)
The path 7 runs when the reference switching was successfully finished – a reference was qualified and no
changes at control signals.
8) (REFERENCE_SWITCHING_HOLDOVER)
The path 8 runs if the following conditions:
9) (FREQ&PHASE_LOCKING_REFERENCE_SWITCHING)
The path 9 runs in the following conditions:
10) (HOLDOVER_ REFERENCE_SWITCHING)
The path 10 runs in the following conditions:
1) if a reference that was selected by control signals,
2) if the selected reference is not available it will switch based on Priority Table (registers PR1 – PR4).
3) if any of the references are not available it will go to holdover (path 8)
1) if a reference that was selected by control signals,
2) if the selected reference is not available it will go to holdover (path 8)
1) if control signals were changed to one (0011) – the holdover mode was selected.
2) if the module is in Auto Switching mode (bit AUTOEN in CFG2 register set to 1) the module will switch
3) if the module is in Manual Switching mode (bit AUTOEN in CFG2 register set to 0) and selected
1) if another reference was selected changing control signals.
2) if the module is in Auto Switching mode (bit AUTOEN in CFG2 register set to 1) the module will switch
3) if the unit was set to operate in Revertive mode (bit REVEN in CFG2 register is set to 1) and
1) current selected reference was reacquired or if the other reference was selected changing control
2) if the unit was set to operate in Revertive mode (bit REVEN in CFG2 register is set to 1) and
to the holdover if none of the reference are available.
reference was not qualified or reference was lost during process of evaluation.
to the reference switching if at least one of the references is available and when the currently selected
reference is failing.
previously lost reference is back the module will switch to reuse the same reference.
signals.
previously lost reference is back the module will switch to reuse the same reference.
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RALTRON ELECTRONICS CORP. § 10651 N.W.19
th
St § Florida 33172 § U.S.A.
STRATUM 3/3E CLOCK UNIT – SY10
SYNCHRONOUS EQUIPMENT
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