參數(shù)資料
型號: IDT82V3255TFG8
廠商: IDT, Integrated Device Technology Inc
文件頁數(shù): 118/132頁
文件大?。?/td> 0K
描述: IC PLL WAN SMC STRATUM 3 64-TQFP
標準包裝: 1,250
類型: 時鐘/頻率發(fā)生器,多路復用器
PLL:
主要目的: 以太網(wǎng),SONET/SDH,Stratum
輸入: CMOS,LVDS,PECL
輸出: CMOS,LVDS,PECL
電路數(shù): 1
比率 - 輸入:輸出: 3:3
差分 - 輸入:輸出: 是/是
頻率 - 最大: 622.08MHz
電源電壓: 3 V ~ 3.6 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-LQFP
供應商設備封裝: 64-TQFP(10x10)
包裝: 帶卷 (TR)
其它名稱: 82V3255TFG8
IDT82V3255
WAN PLL
Programming Information
86
December 3, 2008
PRIORITY_TABLE2_STS - Priority Status 2 *
T0_INPUT_SEL_CNFG - T0 Selected Input Clock Configuration
Address: 4FH
Type: Read
Default Value: 00000000
Bit
Name
Description
7 - 4
THIRD_HIGHEST_PRIORITY_VALIDATED[3:0]
These bits indicate a qualified input clock with the third highest priority.
0000: No input clock is qualified. (default)
0001, 0010: Reserved.
0011: IN1_CMOS.
0100: IN2_CMOS.
0101: IN1_DIFF.
0110: IN2_DIFF.
0111, 1000: Reserved.
1001: IN3_CMOS.
1010 ~ 1111: Reserved.
3 - 0
SECOND_HIGHEST_PRIORITY_VALIDATED[3:0]
These bits indicate a qualified input clock with the second highest priority.
0000: No input clock is qualified. (default)
0001, 0010: Reserved.
0011: IN1_CMOS.
0100: IN2_CMOS.
0101: IN1_DIFF.
0110: IN2_DIFF.
0111, 1000: Reserved.
1001: IN3_CMOS.
1010 ~ 1111: Reserved.
Address: 50H
Type: Read / Write
Default Value: XXXX0000
Bit
Name
Description
7 - 4
-
Reserved.
3 - 0
T0_INPUT_SEL[3:0]
This bit determines T0 input clock selection. It is valid only when the EXT_SW bit (b4, 0BH) is ‘0’.
0000: Automatic selection. (default)
0001, 0010: Reserved.
0011: Forced selection - IN1_CMOS is selected.
0100: Forced selection - IN2_CMOS is selected.
0101: Forced selection - IN1_DIFF is selected.
0110: Forced selection - IN2_DIFF is selected.
0111, 1000: Reserved.
1001: Forced selection - IN3_CMOS is selected.
1010 ~ 1111: Reserved.
7
654
3
2
1
0
THIRD_HIGHE
ST_PRIORITY_
VALIDATED3
THIRD_HIGHE
ST_PRIORITY_
VALIDATED2
THIRD_HIGHE
ST_PRIORITY_
VALIDATED1
THIRD_HIGHE
ST_PRIORITY_
VALIDATED0
SECOND_HIGH
EST_PRIORITY
_VALIDATED3
SECOND_HIGH
EST_PRIORITY
_VALIDATED2
SECOND_HIGH
EST_PRIORITY
_VALIDATED1
SECOND_HIGH
EST_PRIORITY
_VALIDATED0
765
4
3
2
1
0
-
T0_INPUT_SEL3
T0_INPUT_SEL2
T0_INPUT_SEL1
T0_INPUT_SEL0
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