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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
DPLL_0.DPLL_FILTER_STATUS_UPDATE_CFG
DPLL loop filter status update configuration.
DPLL_0.DPLL_HO_ADVCD_HISTORY
Advanced holdover history configuration.
DPLL_0.DPLL_UPDATE_RATE_CFG Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
RESERVED
N/A
-
This field must not be modified from the read value
UPDATE_RATE_CFG[1:0]
R/W
0
DPLL loop filter update rate configuration.
Used to avoid spurs at a specific frequency.
0 = 2.777 MHz
1 = 694 kHz
2 = 174 kHz
3 = 43 kHz
Table 178: DPLL_0.DPLL_FILTER_STATUS_UPDATE_CFG Bit Field Locations and Descriptions
Offset
Address
(Hex)
DPLL_0.DPLL_FILTER_STATUS_UPDATE_CFG Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
006h
RESERVED[7:3]
FILTER_STA
TUS_UPDAT
E_EN[2]
FILTER_STATUS_SELECT_
CNFG[1:0]
DPLL_0.DPLL_FILTER_STATUS_UPDATE_CFG Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
RESERVED
N/A
-
This field must not be modified from the read value
FILTER_STATUS_UPDAT
E_EN[2]
R/W
0
DPLL loop filter status SCSR update enable.
0 = disabled
1 = enabled
FILTER_STATUS_SELECT
_CNFG[1:0]
R/W
0
DPLL filter status SCSR source select configuration.
0 = integrator
1 = propor integrator
2 = holdover value
3 = delta_frequency (final ffo incl. combo mode additions)
Table 179: DPLL_0.DPLL_HO_ADVCD_HISTORY Bit Field Locations and Descriptions
Offset
Address
(Hex)
DPLL_0.DPLL_HO_ADVCD_HISTORY Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
007h
RESERVED[7:6]
HISTORY[5:0]