参数资料
型号: IDT82V3280
厂商: Integrated Device Technology, Inc.
英文描述: WAN PLL
中文描述: 广域网锁相环
文件页数: 94/167页
文件大小: 1039K
代理商: IDT82V3280
IDT82V3280
WAN PLL
Programming Information
94
June 19, 2006
PRE_DIVN[14:8]_CNFG - DivN Divider Division Factor Configuration 2
Address: 25H
Type: Read / Write
Default Value: X0000000
Bit
Name
Description
7
-
Reserved.
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.
6 - 0
PRE_DIVN_VALUE[14:8]
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
6
5
4
3
2
1
0
-
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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