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©2018 Integrated Device Technology, Inc
September 12, 2018
8A3xxxx Family Programming Guide
4. Fast acquisition - bandwidth is set to DPLL_FASTLOCK_BW until lock achieved
Table 205: DPLL_0.DPLL_FASTLOCK_CFG_0 Bit Field Locations and Descriptions
Offset
Address
(Hex)
DPLL_0.DPLL_FASTLOCK_CFG_0 Bit Field Locations
D7
D6
D5
D4
D3
D2
D1
D0
023h
LOCK_REC_
OL_PULL_IN
_EN[7]
LOCK_REC_
FAST_ACQ_
EN[6]
LOCK_REC_
PHASE_SNA
P_EN[5]
LOCK_REC_
FREQ_SNAP
_EN[4]
LOCK_ACQ_
OL_PULL_IN
_EN[3]
LOCK_ACQ_
FAST_ACQ_
EN[2]
LOCK_ACQ_
PHASE_SNA
P_EN[1]
LOCK_ACQ_
FREQ_SNAP
_EN[0]
DPLL_0.DPLL_FASTLOCK_CFG_0 Bit Field Descriptions
Bit Field Name
Field Type Default Value
Description
LOCK_REC_OL_PULL_IN
_EN[7]
R/W
0
Enable open loop pull_in for LOCKREC state.
Use SCSR_DPLL_MAX_FREQ_OFFSET_max_ffo to control the phase pull-in
rate. To enable open loop pull-in, lock_rec_phase_snap_en must also be
enabled.
0 = disabled
1 = enabled
LOCK_REC_FAST_ACQ_
EN[6]
R/W
0
Enable fast acquisition stage for LOCKREC state.
During the fast acquisition stage, the bandwidth is temporarily set to
DPLL_FASTLOCK_BW to facilitate faster lock acquisition.
0 = disabled
1 = enabled
LOCK_REC_PHASE_SNA
P_EN[5]
R/W
0
Enable phase snap for LOCKREC state.
When lock_rec_ol_pull_in_en is also enabled, instead phase snap, open loop
phase pull-in will be performed.
0 = disabled
1 = enabled
LOCK_REC_FREQ_SNAP
_EN[4]
R/W
0
Enable frequency snap for LOCKREC state.
0 = disabled
1 = enabled
LOCK_ACQ_OL_PULL_IN
_EN[3]
R/W
0
Enable open loop pull_in for LOCKACQ state.
Use SCSR_DPLL_MAX_FREQ_OFFSET_max_ffo to control the phase pull-in
rate. To enable open loop pull-in, lock_acq_phase_snap_en must also be
enabled.
0 = disabled
1 = enabled
LOCK_ACQ_FAST_ACQ_
EN[2]
R/W
0
Enable fast acquisition stage for LOCKACQ state.
During the fast acquisition stage, the bandwidth is temporarily set to
DPLL_FASTLOCK_BW to facilitate faster lock acquisition.
0 = disabled
1 = enabled