参数资料
型号: IDT82V3358EDG
厂商: IDT, Integrated Device Technology Inc
文件页数: 110/139页
文件大小: 0K
描述: IC PLL WAN SYNC ETHERNET 64TQFP
标准包装: 160
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: 2:4
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-TQFP 裸露焊盘
供应商设备封装: 64-TQFP-EP(10x10)
包装: 托盘
IDT82V3358
SYNCHRONOUS ETHERNET WAN PLL
Programming Information
72
May 19, 2009
PRE_DIVN[14:8]_CNFG - DivN Divider Division Factor Configuration 2
Address: 25H
Type: Read / Write
Default Value: X0000000
Bit
Name
Description
7-
Reserved.
6 - 0
PRE_DIVN_VALUE[14:8]
If the value in the PRE_DIVN_VALUE[14:0] bits is plus 1, the division factor for an input clock will be gotten. The input
clock is selected by the PRE_DIV_CH_VALUE[3:0] bits (b3~0, 23H).
A value from ‘0’ to ‘4BEF’ (Hex) can be written into, corresponding to a division factor from 1 to 19440. The others are
reserved. So the DivN Divider only supports an input clock whose frequency is lower than (
<) 155.52 MHz.
The division factor setting should observe the following order:
1. Write the lower eight bits of the division factor to the PRE_DIVN_VALUE[7:0] bits;
2. Write the higher eight bits of the division factor to the PRE_DIVN_VALUE[14:8] bits.
7
6543210
-
PRE_DIVN_VAL
UE14
PRE_DIVN_VAL
UE13
PRE_DIVN_VAL
UE12
PRE_DIVN_VAL
UE11
PRE_DIVN_VAL
UE10
PRE_DIVN_VAL
UE9
PRE_DIVN_VAL
UE8
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