IDT 8A3 Series - Page 180

180©2018 Integrated Device Technology, Inc September 12, 2018
8A3xxxx Family Programming Guide
Note: The order of configuring three SCSR modules, SCSR_SYS_DPLL_XO, SCSR_SYS_APLL, SCSR_SYS_DPLL, are critical. The correct
configuration order should be: SCSR_SYS_DPLL_XO, SCSR_SYS_APLL, SCSR_SYS_DPLL, and followed by other modules. Each of these
three SCSR modules should be configured completely before configuring the next module.
Table 221: SYS_DPLL Register Index
Offset
(Hex)
Register Module Base Address: C5B8h
Individual Register Name Register Description
000h SYS_DPLL.SYS_DPLL_CTRL_0 Reference switching configuration and forced lock reference selection.
001h SYS_DPLL.SYS_DPLL_UPDATE_RATE_CFG System DPLL loop filter update rate configuration.
002h SYS_DPLL.SYS_DPLL_FILTER_STATUS_UPD
ATE_CFG
System DPLL loop filter status update configuration.
003h SYS_DPLL.SYS_DPLL_LOCK_0 Phase lock threshold.
004h SYS_DPLL.SYS_DPLL_LOCK_1 Phase lock monitor duration.
005h SYS_DPLL.SYS_DPLL_LOCK_2 Frequency lock threshold.
006h SYS_DPLL.SYS_DPLL_LOCK_3 Frequency lock monitor duration.
007h SYS_DPLL.SYS_DPLL_REF_PRIORITY_0 Select input for highest (0) priority.
008h SYS_DPLL.SYS_DPLL_REF_PRIORITY_1 Select input for priority 1.
009h SYS_DPLL.SYS_DPLL_REF_PRIORITY_2 Select input for priority 2.
00Ah SYS_DPLL.SYS_DPLL_REF_PRIORITY_3 Select input for priority 3.
00Bh SYS_DPLL.SYS_DPLL_REF_PRIORITY_4 Select input for priority 4.
00Ch SYS_DPLL.SYS_DPLL_REF_PRIORITY_5 Select input for priority 5.
00Dh SYS_DPLL.SYS_DPLL_REF_PRIORITY_6 Select input for priority 6.
00Eh SYS_DPLL.SYS_DPLL_REF_PRIORITY_7 Select input for priority 7.
00Fh SYS_DPLL.SYS_DPLL_REF_PRIORITY_8 Select input for priority 8.
010h SYS_DPLL.SYS_DPLL_REF_PRIORITY_9 Select input for priority 9.
011h SYS_DPLL.SYS_DPLL_REF_PRIORITY_10 Select input for priority 10.
012h SYS_DPLL.SYS_DPLL_REF_PRIORITY_11 Select input for priority 11.
013h SYS_DPLL.SYS_DPLL_REF_PRIORITY_12 Select input for priority 12.
014h SYS_DPLL.SYS_DPLL_REF_PRIORITY_13 Select input for priority 13.
015h SYS_DPLL.SYS_DPLL_REF_PRIORITY_14 Select input for priority 14.
016h SYS_DPLL.SYS_DPLL_REF_PRIORITY_15 Select input for priority 15.
017h SYS_DPLL.SYS_DPLL_REF_PRIORITY_16 Select input for priority 16.
018h SYS_DPLL.SYS_DPLL_REF_PRIORITY_17 Select input for priority 17.
019h SYS_DPLL.SYS_DPLL_REF_PRIORITY_18 Select input for priority 18.
01Ah RESERVED This register must not be modified from the read value
01Bh SYS_DPLL.SYS_DPLL_REF_MODE Reference selection configuration.
01Ch SYS_DPLL.SYS_DPLL_MODE System DPLL state machine transition mode.