STC5428 Datasheet, PDF (46/66 Pages) Connor-Winfield Corporation – Synchronous Clock for SETS

SYNC Indicates synchronization has been achieved
0 = Not synchronized
1 = Synchronized
STC5428
Synchronous Clock for SETS
DATASHEET
LOS
Loss of signal of the selected reference
0 = No Loss
1 = Loss (Indicate loss of signal, freerun, pseudo holdover and holdover)
LOL
Loss of lock (Failure to achieve or maintain lock)
0 = No loss of lock
1 = Loss of lock (Indicate loss of lock, freerun, pseudo holdover and holdover)
OOP
Out of pull-in range. Indicate the frequency offset of the selected reference input is out of pull-in range.
1 = Out of pull-in range
0 = In range
SAP
Indicates the output clocks have stopped following the selected reference, caused by out of pull-in
range
1 = Stop following at pull-in range boundary
0 = Following
FEE
Frame edge error. Indicates whether an error occurs in the frame edge selection process in slave
mode or master phase align mode. For timing generator T0 only.
1 = Frame edge error occurs
0 = No frame edge error occurs
DHT
Indicates whether the device holdover history is being updated by long-term history at the register
Device Holdover History. The device holdover history will begin and be continuously updated by the
long-term history after the clock output is synchronized to the selected reference input for a period of
History Settling Time (See register History_Ramp for details). Updating will stop if reference is
switched, LOS/LOL occurs, or entering freerun/holdover mode. Additionally, updating will stop if the
long-term history is flushed by writing to the register Holdover Accu Flush.
1 = Device holdover history is being updated by long-term history.
0 = Device holdover history stops updating and freezes at the latest value when updating stops.
HHA
Holdover History Availability.
When the bit HO_Usage of the register Control_Mode is configured as device holdover history, this
bit indicates whether the device holdover history is currently available.
When the bit HO_Usage is configured as the user-specified history, this bit is always set to “1” indicat
ing that the user-specified history is currently selected. The history value can be written to the register
User Specified History.
1 = Available
0 = Not available
Holdover_Accu_Flush, 0x3D (W)
Address
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
0x3D
Not used
Flush long-term history or flush both long-term history and device holdover history.
Bit1
Bit0
HO flush
Page 46 of 66
Preliminary
Rev: 0.2
© Copyright the Connor-Winfield Corp. All Rights Reserved Specifications subject to change without notice
Date: April 3, 2014