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PM73121-RI 参数 Datasheet PDF下载

PM73121-RI图片预览
型号: PM73121-RI
PDF下载: 下载PDF文件 查看货源
内容描述: AAL1分段重组处理器 [AAL1 Segmentation And Reassembly Processor]
分类和应用: ATM集成电路SONET集成电路SDH集成电路电信集成电路电信电路异步传输模式
文件页数/大小: 223 页 / 2148 K
品牌: PMC [ PMC-SIERRA, INC ]
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PM73121AAL1gator II  
Data Sheet  
PMC-Sierra, Inc.  
PMC-980620  
,VVXHꢀꢁ  
AAL1 SAR Processor  
T_COND_CELL_CNT Word Format  
Field (Bits)  
Description  
T_COND_CELL_CNT  
(15:0)  
A 16-bit rollover count of conditioned cells transmitted.  
T_SUPPRESSED_CELL_CNT Word Format  
Field (Bits)  
Description  
T_SUPPRESSED_CELL_CNT  
(15:0)  
A 16-bit rollover count of cells not sent because of a line resynchronization.  
Or, if in UDF-HS mode, a 16-bit rollover count of cells not sent because TX_ACTIVE  
is not set. This counter also counts when cells are not sent because SUPPRESS_  
TRANSMISSION (refer to “SUPPRESS_TRANSMISSION” on page 139) is set.  
QUEUE_CONFIG Word Format  
Field (Bits)  
Description  
TX_COND  
(15)  
Sends data and signaling from the transmit conditioned data area. Initialize to the proper  
value.  
TX_ACTIVE  
(14)  
Enables this queue. To enable sending cells on a UDF-HS connection, assert this bit. To  
enable non-UDF-HS connections:  
1. Assert this bit.  
2. Set the bit corresponding to this queue in the T_ADD_QUEUE table (refer to  
section 7.6.2 “T_ADD_QUEUE” on page 128).  
3. Assert the CSD_ATTN bit in the CMD_REG (refer to “CMDREG Word For-  
mat” on page 165).  
To disable non-UDF_HS connections, clear this bit. This queue is then removed from  
the calendar queue the next time a cell would have been sent. This queue must not be  
returned to the calendar queue until enough time has elapsed for this to have occurred.  
NOTE: When reactivating a previously active queue, be sure to reinitialize all the regis-  
ters in the queue table for that queue.  
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