参数资料
型号: DS26334GNA3+
厂商: Maxim Integrated Products
文件页数: 104/121页
文件大小: 0K
描述: IC LIU E1/T1/J1 3.3V 256-CSBGA
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 90
类型: 线路接口装置(LIU)
驱动器/接收器数: 16/16
规程: IEEE 1149.1
电源电压: 3.135 V ~ 3.465 V
安装类型: 表面贴装
封装/外壳: 256-LBGA,CSBGA
供应商设备封装: 256-CSBGA(17x17)
包装: 托盘
DS26334 3.3V, 16-Channel, E1/T1/J1 Short/Long-Haul Line Interface Unit
83 of 121
Register Name:
CCR
Register Description:
Clock Control Register
Register Address:
15h
Bit #
7
6
5
4
3
2
1
0
Name
PCLKS2
PCLKS1
PCLKS0
TECLKS
CLKA3
CLKA2
CLKA1
CLKA0
Default
0
Bits 7 to 5: PLL Clock Select (PCLKS[2:0]). These bits determine the RCLK that is to be used as the input to the
PLL. If an LOS is detect for the channel that RCLK is recovered from, the PLL will switch to MCLK until the LOS is
cleared. When the LOS is cleared RCLK will be used again. See Table 6-20 for RCLK selection. MC.PCLKI[1:0]
must be set to ‘01’ or ‘10’ in order for these settings to take effect.
Table 6-20. PLL Clock Select
PCLKS[2:0]
PLL CLOCK
SELECTED
PLL CLOCK
SELECTED
PCLKI[1:0]=01
000
PCLKI[1:0]=10
RCLK1
RCLK9
001
RCLK2
RCLK10
010
RCLK3
RCLK11
011
RCLK4
RCLK12
100
RCLK5
RCLK13
101
RCLK6
RCLK14
110
RCLK7
RCLK15
111
RCLK8
RCLK16
Bit 4: T1/E1 Clock Select (TECLKS). When this bit is set the T1/E1 clock output is 2.048MHz. When this bit is
reset the T1/E1 clock rate is 1.544MHz
Bits 3 to 0: Clock A Select (CLKA[3:0]). These bits select the output frequency for CLKA pin. See Table 6-21 for
available frequencies. For best jitter performance, select MCLK as the source for CLKA and input a 2.048MHz
MCLK.
Table 6-21. Clock A Select
CLKA[3:0]
CLKA (Hz)
0000
2.048M
0001
4.096M
0010
8.192M
0011
16.384M
0100
1.544M
0101
3.088M
0110
6.176M
0111
12.352M
1000
1.536M
1001
3.072M
1010
6.144M
1011
12.288M
1100
32k
1101
64k
1110
128k
1111
256k
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