欢迎访问ic37.com |
会员登录 免费注册
发布采购

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 ]
 浏览型号RS8953SPBEPJ的Datasheet PDF文件第107页浏览型号RS8953SPBEPJ的Datasheet PDF文件第108页浏览型号RS8953SPBEPJ的Datasheet PDF文件第109页浏览型号RS8953SPBEPJ的Datasheet PDF文件第110页浏览型号RS8953SPBEPJ的Datasheet PDF文件第112页浏览型号RS8953SPBEPJ的Datasheet PDF文件第113页浏览型号RS8953SPBEPJ的Datasheet PDF文件第114页浏览型号RS8953SPBEPJ的Datasheet PDF文件第115页  
RS8953B/8953SPB  
4.0 Registers  
HDSL Channel Unit  
4.10 Data Path Options  
DBANK_SEL[1:0] Data Bank Select (Applicable only if COMBINE = 00)—Selects one of three DBANK  
registers to output on RSER during the respective timeslot.  
DBANK_SEL[1:0]  
Source of RSER Output Data  
Determined by COMBINE[1:0]  
DBANK_1; addr 0xDC  
00  
01  
10  
11  
DBANK_2; addr 0xDD  
Determined by RSIG_EN  
RSIG_EN  
RSER Source  
0
1
DBANK_3; addr 0xDE  
RSIG_TBL; addr 0xF2  
0xF2—Receive Signaling Table (RSIG_TBL)  
Applicable only to the LTU grooming site in a 2E1 or 3E1 Point-to-Multipoint (P2MP) system, the receive  
signaling table assembles E1 Timeslot 16 (TS16) from the ABCD signaling supplied by the three remote sites.  
Signaling from each channel is located by RSIG_TBL selection of a particular timeslot in the receive  
combination table, and automatically sampled when RSIG_EN [CMD_6; addr 0xF3] is active. The groomed  
signaling table output replaces the DBANK_3 register selection in the receive Combination Table  
[COMBINE_TBL; addr 0xEE].  
MPU access to the receive signaling table is provided through the RSIG_TBL register by first setting  
RSIG_WR [CMD_3; addr 0xE7] to reset the table pointer to zero, and then by writing up to 16 entries  
sequentially to RSIG_TBL. The RS8953B increments the table pointer after each write cycle to the RSIG_TBL  
address. The first table entry corresponds to the first E1 frame (frame 0) output on RSER and corresponds to  
subsequent entries to successive frames. Each entry contains two identical RSIG[1:0] grooming codes which  
select the HDSL channel source for ABCD signaling bits during the respective frame. For example, frame 1  
grooming codes select ABCD for E1 channels 1 and 17, frame 2 selects ABCD for E1 channels 2 and 18, and  
so on. Grooming codes for E1 frame 0 are similar to other E1 frames, and allow the system to select which  
HDSL channel supplies the CAS Multiframe Alignment Signal (MAS) and which channel supplies the extra  
and multiframe yellow alarm bits (XYXX). RS8953B does not provide access to the actual received TS16 data  
and assumes that EOC messages or indicator bits are used to report far-end alarm and status information.  
7
6
5
4
3
2
1
0
RSIG[1:0]  
RSIG[1:0]  
RSIG[1:0]  
Receive Signaling Grooming Code—Selects which HDSL channel supplies ABCD signaling,  
MAS, or XYXX bits for output on RSER during the PCM timeslot selected by receive  
combination table. Sixteen table entries correspond to E1 frames 0 through 15, where the most  
significant grooming code corresponds to the first four bits of the TS16 output.  
RSIG[1:0]  
TS16 Source  
None (invalid)  
HDSL Channel 1  
HDSL Channel 2  
HDSL Channel 3  
00  
01  
10  
11  
N8953BDSB  
Conexant  
4-43