參數(shù)資料
型號: IDT82V3255
廠商: Integrated Device Technology, Inc.
英文描述: WAN PLL
中文描述: 廣域網(wǎng)鎖相環(huán)
文件頁數(shù): 93/127頁
文件大?。?/td> 868K
代理商: IDT82V3255
IDT82V3255
WAN PLL
Programming Information
93
June 19, 2006
T0_DPLL_LOCKED_BW_DAMPING_CNFG - T0 DPLL Locked Bandwidth & Damping Factor Configuration
T0_BW_OVERSHOOT_CNFG - T0 DPLL Bandwidth Overshoot Configuration
Address: 58H
Type: Read / Write
Default Value: 01101111
Bit
Name
Description
7 - 5
T0_DPLL_LOCKED_DAMPING[2:0]
These bits set the locked damping factor for T0 DPLL.
000: Reserved.
001: 1.2.
010: 2.5.
011: 5. (default)
100: 10.
101: 20.
110, 111: Reserved.
These bits set the locked bandwidth for T0 DPLL.
00XXX: Reserved.
01000: 0.1 Hz.
01001: 0.3 Hz.
01010: 0.6 Hz.
01011: 1.2 Hz. (default)
01100: 2.5 Hz.
01101: 4 Hz.
01110: 8 Hz.
01111: 18 Hz.
10000: 35 Hz.
10001: 70 Hz.
10010: 560 Hz.
10011 ~ 11111: Reserved.
4 - 0
T0_DPLL_LOCKED_BW[4:0]
Address: 59H
Type: Read / Write
Default Value: 1XXX1XXX
Bit
Name
Description
7
AUTO_BW_SEL
This bit determines whether starting or acquisition bandwidth / damping factor is used for T0 DPLL.
0: The starting and acquisition bandwidths / damping factors are not used. Only the locked bandwidth / damping factor is used
regardless of the T0 DPLL locking stage.
1: The starting, acquisition or locked bandwidth / damping factor is used automatically depending on different T0 DPLL locking
stages. (default)
Reserved.
This bit determines whether the integral path value is frozen when the T0 DPLL hard limit is reached.
0: Not frozen.
1: Frozen. It will minimize the subsequent overshoot when T0 DPLL is pulling in. (default)
Reserved.
6 - 4
-
3
T0_LIMT
2 - 0
-
7
6
5
4
3
2
1
0
T0_DPLL_LOCK
ED_DAMPING2
T0_DPLL_LOCK
ED_DAMPING1
T0_DPLL_LOCK
ED_DAMPING0
T0_DPLL_LOC
KED_BW4
T0_DPLL_LOC
KED_BW3
T0_DPLL_LOC
KED_BW2
T0_DPLL_LOC
KED_BW1
T0_DPLL_LOC
KED_BW0
7
6
5
4
3
2
1
0
AUTO_BW_SEL
-
-
-
T0_LIMT
-
-
-
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