参数资料
型号: IDT82V3355TFG8
厂商: IDT, Integrated Device Technology Inc
文件页数: 123/135页
文件大小: 0K
描述: IC PLL WAN SYNC ETH 64-TQFP
标准包装: 1,250
类型: 时钟/频率发生器,多路复用器
PLL:
主要目的: 以太网,SONET/SDH,Stratum
输入: CMOS,LVDS,PECL
输出: CMOS,LVDS,PECL
电路数: 1
比率 - 输入:输出: 3:2
差分 - 输入:输出: 是/是
频率 - 最大: 622.08MHz
电源电压: 3 V ~ 3.6 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-TQFP(10x10)
包装: 带卷 (TR)
其它名称: 82V3355TFG8
IDT82V3355
SYNCHRONOUS ETHERNET WAN PLL
Programming Information
88
May 19, 2009
T4_INPUT_SEL_CNFG - T4 Selected Input Clock Configuration
Address: 51H
Type: Read / Write
Default Value: X0000000
Bit
Name
Description
7-
Reserved.
6
T4_LOCK_T0
This bit determines whether the T4 DPLL locks to a T0 DPLL output or locks independently from the T0 DPLL.
0: Independently from the T0 path. (default)
1: Locks to a 77.76 MHz or 8 kHz signal from the T0 DPLL 77.76 MHz path.
5
T0_FOR_T4
This bit is valid only when the T4_LOCK_T0 bit (b6, 51H) is ‘1’. It determines whether a 77.76 MHz or 8 kHz signal from the
T0 DPLL 77.76 MHz path is selected by the T4 DPLL.
0: 77.76 MHz. (default)
1: 8 kHz.
4
T4_TEST_T0_PH
This bit determines whether T4 selected input clock is compared with the feedback signal of the T4 DPLL for T4 DPLL locking
or is compared with the T0 selected input clock to get the phase difference between T0 and T4 selected input clocks.
0: The T4 DPLL output. (default)
1: The T0 selected input clock.
3 - 0
T4_INPUT_SEL[3:0]
These bits are valid only when the T4_LOCK_T0 bit (b6, 51H) is ‘0’. They determines the T4 DPLL input clock selection.
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
6
5
4
3
210
-
T4_LOCK_T0
T0_FOR_T4
T4_TEST_T0_PH
T4_INPUT_SEL3
T4_INPUT_SEL2
T4_INPUT_SEL1
T4_INPUT_SEL0
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