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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
DPLL_CTRL_0.DPLL_HO_HISTORY_RESET
Reset advanced holdover history.
DPLL_CTRL_0.DPLL_FINE_PHASE_ADV_CFG
Configure the fine phase advance to be applied to the DPLL.
DPLL_CTRL_0.DPLL_PHASE_OFFSET_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
DPLL_PHASE_OFFSET_
CFG[35:0]
R/W
0
Signed 36-bit phase offset in ITDC_UIs.
ITDC_UI is input TDC unit interval. Please refer to the SCSR_INPUT_TDC
module for details on input TDC settings and ITDC_UI value. The default input
TDC settings yield 50ps ITDC_UI. A positive value here will cause an output
clock phase delay relative to the input clock phase and a negative value will
cause an output phase advance relative to the input clock phase.
Note that this phase offset configuration applies to both DPLL mode and write
phase mode.
Table 266: DPLL_CTRL_0.DPLL_HO_HISTORY_RESET Bit Field Locations and Descriptions
Offset
Address
(Hex)
DPLL_CTRL_0.DPLL_HO_HISTORY_RESET Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
019h
RESERVED[7:1]
HO_HISTOR
Y_RESET[0]
DPLL_CTRL_0.DPLL_HO_HISTORY_RESET Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
RESERVED
N/A
-
This field must not be modified from the read value
HO_HISTORY_RESET[0]
R/W
0
Reset advanced holdover history.
1 = enable reset, 0 = cancel reset. This bit is a self-clear bit. When the HO
history is cleared, this bit will be cleared to 0 by FW.
Table 267: DPLL_CTRL_0.DPLL_FINE_PHASE_ADV_CFG Bit Field Locations and Descriptions
Offset
Address
(Hex)
DPLL_CTRL_0.DPLL_FINE_PHASE_ADV_CFG Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
01Ah
FINE_PHASE_ADVANCE[7:0]
01Bh
RESERVED[15:13]
FINE_PHASE_ADVANCE[12:8]