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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
SYS_DPLL.SYS_DPLL_LOCK_3
The duration in seconds the frequency has to be locked before declaring locked.
SYS_DPLL.SYS_DPLL_REF_PRIORITY_0
Lowest priority index is highest priority.
SYS_DPLL.SYS_DPLL_LOCK_2 Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
FFO_UNIT[7:6]
R/W
0
FFO error unit.
0 = 1 ppb
1 = 10 ppb
2 = 100 ppb
3 = 1 ppm
FFO_LOCK_MAX_ERROR
[5:0]
R/W
0
Integer maximum FFO error for lock criteria.
If 0, then Fractional Frequency Offset check is disabled.
Table 228: SYS_DPLL.SYS_DPLL_LOCK_3 Bit Field Locations and Descriptions
Offset
Address
(Hex)
SYS_DPLL.SYS_DPLL_LOCK_3 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
006h
FFO_MON_DUR[7:0]
SYS_DPLL.SYS_DPLL_LOCK_3 Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
FFO_MON_DUR[7:0]
R/W
0
Duration of FFO error monitoring before lock declared (seconds).
0 means that the frequency is declared locked immediately after FFO lock
criteria is met.
Table 229: SYS_DPLL.SYS_DPLL_REF_PRIORITY_0 Bit Field Locations and Descriptions
Offset
Address
(Hex)
SYS_DPLL.SYS_DPLL_REF_PRIORITY_0 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
007h
PRIORITY_GROUP_NUMBE
R[7:6]
PRIORITY_REF[5:1]
PRIORITY_E
N[0]