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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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RS8953B/8953SPB  
4.0 Registers  
HDSL Channel Unit  
4.6 PCM Formatter  
7
6
5
4
3
2
1
0
RFRAME_LOC[7:0]  
0xC4—RSER Frame Bit Location (RFRAME_LOC_HI)  
7
6
5
4
3
2
1
0
RFRAME_LOC[8]  
RFRAME_LOC[8:0] RSER Frame Bit Location—Establishes the number of PCM bit delays, in the range of 1 bit to  
512 bits, from the internal PCM receive timebases output of bit 0 to the rising edge of  
RMSYNC. Due to internal bit delays, a value of two will delay RMSYNC by one RCLK  
period, in which case the rising edge of RMSYNC coincides with output of RSER bit 1. If the  
system desires RMSYNC to mark RSER bit0, then RFRAME_LOC is programmed to equal 1.  
The following examples assume RMSYNC is desired to mark RSER bit 0:  
PCM Frame Length  
E1 = 256 bits  
T1 = 193 bits  
64x64 = 512 bits  
RFRAME_LOC[8:0] = Decimal (hex)  
1 (0x01)  
1 (0x01)  
1 (0x01)  
0xC5—RSER Multiframe Bit Location (RMF_LOC)  
7
6
5
4
3
2
1
0
RMF_LOC[5:0]  
RMF_LOC[5:0]  
RSER Multiframe Bit Location—Establishes the number of PCM frame delays, in the range of  
1 to 64 frames, from the internal PCM receive timebases output of frame 0 to the rising edge  
of RMSYNC. Due to internal frame delay, a value of one delays RMSYNC by one PCM  
frame. RMF_LOC enacts the RMSYNC frame delay after the RFRAME_LOC bit delay. If the  
system desires RMSYNC to mark RSER frame 0, then RMF_LOC is programmed to equal 0.  
The following examples assume RMSYNC is desired to mark RSER frame 0:  
PCM Multiframe Length  
E1 = 16 frames  
RMF_LOC[5:0] = Decimal (hex)  
0 (0x00)  
0 (0x00)  
0 (0x00)  
SF = 12 frames  
ESF = 24 frames  
0xC6—PCM Multiframe Length (MF_LEN)  
7
6
5
4
3
2
1
0
MF_LEN[5:0]  
N8953BDSB  
Conexant  
4-27