参数资料
型号: IDT82V3355TFG
厂商: IDT, Integrated Device Technology Inc
文件页数: 85/135页
文件大小: 0K
描述: IC PLL WAN SYNC ETH 64-TQFP
标准包装: 1
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: 托盘
其它名称: 82V3355TFG
IDT82V3355
SYNCHRONOUS ETHERNET WAN PLL
Programming Information
53
May 19, 2009
NOMINAL_FREQ[7:0]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 1
NOMINAL_FREQ[15:8]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 2
NOMINAL_FREQ[23:16]_CNFG - Crystal Oscillator Frequency Offset Calibration Configuration 3
Address: 04H
Type: Read / Write
Default Value: 00000000
Bit
Name
Description
7 - 0 NOMINAL_FREQ_VALUE[7:0] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H).
Address: 05H
Type: Read / Write
Default Value: 00000000
Bit
Name
Description
7 - 0
NOMINAL_FREQ_VALUE[15:8] Refer to the description of the NOMINAL_FREQ_VALUE[23:16] bits (b7~0, 06H).
Address: 06H
Type: Read / Write
Default Value: 00000000
Bit
Name
Description
7 - 0 NOMINAL_FREQ_VALUE[23:16]
The NOMINAL_FREQ_VALUE[23:0] bits represent a 2’s complement signed integer. If the value is multiplied by
0.0000884, the calibration value for the master clock in ppm will be gotten.
For example, the frequency offset on OSCI is +3 ppm. Though -3 ppm should be compensated, the calibration value is
calculated as +3 ppm:
3 ÷ 0.0000884 = 33937 (Dec.) = 8490 (Hex);
So ‘008490’ should be written into these bits.
The calibration range is within ±741 ppm.
76
543
21
0
NOMINAL_FRE
Q_VALUE7
NOMINAL_FRE
Q_VALUE6
NOMINAL_FRE
Q_VALUE5
NOMINAL_FRE
Q_VALUE4
NOMINAL_FRE
Q_VALUE3
NOMINAL_FRE
Q_VALUE2
NOMINAL_FRE
Q_VALUE1
NOMINAL_FRE
Q_VALUE0
76
54
32
1
0
NOMINAL_FRE
Q_VALUE15
NOMINAL_FRE
Q_VALUE14
NOMINAL_FRE
Q_VALUE13
NOMINAL_FRE
Q_VALUE12
NOMINAL_FRE
Q_VALUE11
NOMINAL_FRE
Q_VALUE10
NOMINAL_FRE
Q_VALUE9
NOMINAL_FRE
Q_VALUE8
76
543
21
0
NOMINAL_FRE
Q_VALUE23
NOMINAL_FRE
Q_VALUE22
NOMINAL_FRE
Q_VALUE21
NOMINAL_FRE
Q_VALUE20
NOMINAL_FRE
Q_VALUE19
NOMINAL_FRE
Q_VALUE18
NOMINAL_FRE
Q_VALUE17
NOMINAL_FRE
Q_VALUE16
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