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RS8953SPBEPJ 参数 Datasheet PDF下载

RS8953SPBEPJ图片预览
型号: RS8953SPBEPJ
PDF下载: 下载PDF文件 查看货源
内容描述: 高比特率数字用户线( HDSL )信道单元 [High-Bit-Rate Digital Subscriber Line (HDSL) channel unit]
分类和应用: 电信集成电路
文件页数/大小: 173 页 / 1229 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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4.0 Registers  
RS8953B/8953SPB  
4.11 Common Command  
HDSL Channel Unit  
4.11 Common Command  
Table 4-8. Common Command Write Registers  
Address  
Register Label  
Bits  
Name/Description  
0xE5  
0xE6  
0xE7  
0xE8  
0xE9  
0xF3  
0xF4  
CMD_1  
CMD_2  
CMD_3  
CMD_4  
CMD_5  
CMD_6  
CMD_7  
8
8
8
8
8
8
7
Configuration  
Configuration  
Configuration  
Configuration  
Configuration  
Configuration  
Configuration  
0xE5—Command Register 1 (CMD_1)  
7
6
5
4
3
2
1
0
E1_MODE  
PLL_DIS  
PLL_DIV[1:0]  
PLL_MUL[3:0]  
PLL_MUL[3:0]  
PLL Multiplication Factor—The MCLK input frequency is multiplied from 1 to 16 times by  
the selected value to create an internal HFCLK approximately equal to 70 MHz and in the  
range of 60 to 80 MHz for DPLL clock recovery. When PLL_MUL has a value of 0xF, the PLL  
output is invalid.  
PLL_MUL [hex]  
MCLK Multiplier 16 15 14 13 12 11 10  
0
1
2
3
4
5
6
7
9
8
8
9
7
A
6
B
5
C
4
D
3
E
2
F
PLL_DIV[1:0]  
PLL Division Factor—Selects a divisor to scale down the internal HFCLK frequency to create  
a General Purpose Clock (GCLK) in the frequency range of 10–15 MHz. PLL_DIV  
determines the GCLK frequency for the DPLL phase detector and loop filter.  
PLL_DIV  
HFCLK Divisor  
00  
01  
10  
11  
2
4
6
8
PLL_DIS  
PLL Disable—Disables the internal PLL which normally generates HFCLK. When disabled, a  
60 to 80 MHz HFCLK must be applied externally on the MCLK input.  
0 = Normal PLL operation  
1 = Disable PLL (PLL_MUL value has no effect)  
E1_MODE  
E1 or Nx64 Mode—Enables insertion of Z-bits from the TZBIT [addr 0x04] registers, and  
extraction of Z-bits into the RZBIT [addr 0x04] registers. Otherwise, F-bits occupy the first bit  
of HDSL payload blocks.  
0 = HDSL payload includes F-bits (T1 mode)  
1 = HDSL payload includes Z-bits (E1 mode)  
4-44  
Conexant  
N8953BDSB