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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
STATUS.SYS_APLL_STATUS
System APLL status.
STATUS.DPLL_SYS_STATUS Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
RESERVED
N/A
-
This field must not be modified from the read value
DPLL_SYS_HOLDOVER_
STATE_CHANGE_STICKY
[5]
R/O
0
Holdover state change sticky bit.
Indicates whether any transition to or from Holdover state occurred.
0 = no transition to or from Holdover state
1 = transition to or from Holdover state
DPLL_SYS_LOCK_STATE
_CHANGE_STICKY[4]
R/O
0
Lock state change sticky bit.
Indicates whether any transition to or from Locked state occurred.
0 = no transition to or from Locked state
1 = transition to or from Locked state
DPLL_SYS_STATE[3:0]
R/O
0
Current state of SYS_DPLL.
0 = freerun
1 = lockacq
2 = lockrec
3 = locked
4 = holdover
5 = open loop
Table 57: STATUS.SYS_APLL_STATUS Bit Field Locations and Descriptions
Offset
Address
(Hex)
STATUS.SYS_APLL_STATUS Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
021h
RESERVED[7:5]
SYS_APLL_
LOSS_LOCK
_STICKY[4]
RESERVED[3:1]
SYS_APLL_
LOSS_LOCK
_LIVE[0]
STATUS.SYS_APLL_STATUS Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
SYS_APLL_LOSS_LOCK_
STICKY[4]
R/O
0
System APLL loss lock sticky bit.
Indicates that loss of lock was detected for system APLL.
0 = no change
1 = live status changed
RESERVED
N/A
-
This field must not be modified from the read value
SYS_APLL_LOSS_LOCK_
LIVE[0]
R/O
0
System APLL loss lock live status.
Indicates that loss of lock is currently detected for system APLL.
0 = locked
1 = unlocked