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PM4328-PI 参数 Datasheet PDF下载

PM4328-PI图片预览
型号: PM4328-PI
PDF下载: 下载PDF文件 查看货源
内容描述: 高密度T1 / E1成帧器,集成M13多路复用器 [HIGH DENSITY T1/E1 FRAMER WITH INTEGRATED M13 MULTIPLEXER]
分类和应用: 复用器数字传输控制器电信集成电路电信电路异步传输模式ATM
文件页数/大小: 250 页 / 1399 K
品牌: PMC [ PMC-SIERRA, INC ]
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STANDARD PRODUCT  
PM4328 TECT3  
DATASHEET  
PMC-2011596  
ISSUE 1  
HIGH DENSITY T1/E1 FRAMER  
AND M13 MULTIPLEXER  
microprocessor access: when the BUSY bit is logic 1, the TPSC or RPSC is  
processing an access request; when the BUSY bit is logic 0, the TPSC or RPSC  
has completed the request.  
The indirect write programming sequence for the TPSC (RPSC) is as follows:  
1. Check that the BUSY bit in the TPSC (RPSC) µP Access Status Register is  
logic 0.  
2. Write the channel data to the TPSC (RPSC) Channel Indirect Data Buffer  
register.  
3. Write RWB=0 and the channel address to the TPSC (RPSC) Channel Indirect  
Address/Control Register.  
4. Poll the BUSY bit until it goes to logic 0. The BUSY bit will go to logic 1  
immediately after step 3 and remain at logic 1 until the request is complete.  
5. If there is more data to be written, go back to step 1.  
The indirect read programming sequence for the TPSC (RPSC) is as follows:  
1. Check that the BUSY bit in the TPSC (RPSC) µP Access Status Register is  
logic 0.  
2. Write RWB=1 and the channel address to the TPSC (RPSC) Channel Indirect  
Address/Control Register.  
3. Poll the BUSY bit, waiting until it goes to a logic 0. The BUSY bit will go to  
logic 1 immediately after step 2 and remain at logic 1 until the request is  
complete.  
4. Read the requested channel data from the TPSC (RPSC) Channel Indirect  
Data Buffer register.  
5. If there is more data to be read, go back to step 1.  
12.8 T1/E1 Framer Loopback Modes  
The TECT3 provides three loopback modes for T1/E1 links to aid in network and  
system diagnostics. The internal T1/E1 line loopback can be initiated at any time  
via the µP interface, but is usually initiated once an inband loopback activate  
code is detected. The system Diagnostic Digital loopback can be initiated at any  
time by the system via the µP interface to check the path of system data through  
PROPRIETARY AND CONFIDENTIAL  
151