参数资料
型号: DS3105LN+
厂商: Maxim Integrated Products
文件页数: 56/124页
文件大小: 0K
描述: IC TIMING LINE CARD 64-LQFP
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 160
类型: 定时卡 IC,多路复用器
PLL:
主要目的: 以太网,SONET/SDH,Stratum,电信
输入: CMOS,LVDS,LVPECL,TTL
输出: CMOS,LVDS,LVPECL,TTL
电路数: 1
比率 - 输入:输出: 5:2
差分 - 输入:输出: 无/是
频率 - 最大: 312.5MHz
电源电压: 1.62 V ~ 1.98 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-LQFP(10x10)
包装: 托盘
DS3105
37
7.8.2.3 OC3 and OC6 Configuration
The following is a step-by-step procedure for configuring the frequencies of output clocks OC3 and OC6:
Use Table 7-9 to select a set of output frequencies for each APLL, T0 and T4. Each APLL can only
generate one set of output frequencies. (In SONET/SDH equipment, the T0 APLL is typically
configured for a frequency of 311.04MHz to get N x 19.44MHz output clocks to distribute to
system line cards.)
Determine from Table 7-9 the T0 and T4 APLL frequencies required for the frequency sets chosen
in step 2.
Configure the T0FREQ field in register T0CR1 as shown in Table 7-10 for the T0 APLL frequency
determined in step 3. Configure fields T4CR1:T4FREQ, T0CR1:T4APT0, and T0CR1:T0FT4
as shown in Table 7-12 for the T4 APLL frequency determined in step 3.
Using Table 7-9 and Table 7-13, configure the frequencies of output clocks OC3 and OC6 in the
OFREQn fields of registers OCR2 and OCR4 and the AOFn bits in the OCR5 register.
Table 7-14 lists all standard frequencies for the output clocks and specifies how to configure the T0 APLL and/or
the T4 APLL to obtain each frequency. Table 7-14 also indicates the expected jitter amplitude for each frequency.
Table 7-7. Digital1 Frequencies
DIG1F[1:0]
SETTING IN
DIG1SS
SETTING IN
FREQUENCY
(MHz)
JITTER
(pk-pk, ns,
typ)
00
0
2.048
< 1
01
0
4.096
< 1
10
0
8.192
< 1
11
0
16.384
< 1
00
1
1.544
< 1
01
1
3.088
< 1
10
1
6.176
< 1
11
1
12.352
< 1
Table 7-8. Digital2 Frequencies
DIG2AF
SETTING
IN MCR6
DIG2F[1:0]
SETTING
IN MCR7
DIG2SS
SETTING
IN MCR6
FREQUENCY
(MHz)
JITTER
(pk-pk,
ns, typ)
1
00
0
6.312
< 1
1
10
0
10.000
<1
1
00
1
19.440
< 1
1
01
1
38.880
< 1
0
00
0
2.048
< 1
0
01
0
4.096
< 1
0
10
0
8.192
< 1
0
11
0
16.384
< 1
0
00
1
1.544
< 1
0
01
1
3.088
< 1
0
10
1
6.176
< 1
0
11
1
12.352
< 1
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