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PM73487 参数 Datasheet PDF下载

PM73487图片预览
型号: PM73487
PDF下载: 下载PDF文件 查看货源
内容描述: 622 Mbps的ATM流量管理设备 [622 Mbps ATM Traffic Management Device]
分类和应用: 异步传输模式ATM
文件页数/大小: 251 页 / 2936 K
品牌: PMC [ PMC-SIERRA, INC ]
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Released  
Datasheet  
PM73487 QRT  
PMC-Sierra, Inc.  
PMC-980618  
Issue 3  
622 Mbps ATM Traffic Management Device  
9.4 ABR_RAM  
Table 42 summarizes the contents of the AB_RAM.  
Table 42. AB_RAM Summary  
Byte  
Offset  
Long  
Offset  
Read or  
Write  
Name  
Description  
0180000h 600000h Receive Channel Queue Block  
R/W  
R/W  
Receive channel head and tail pointers.  
Receive channel sent/drop cell counters  
0184000h 610000h Receive Channel Sent/Drop  
counters  
9.4.1 Receive Channel Queue Block  
Base address: 600000h (0180000h byte)  
Index: 2h  
The long address = 600000h + RX_CHAN_NUM × 2h+ long_offset  
Table 43. Receive Channel Queue Block Summary  
Address  
Name  
RX_CH_HEAD  
Read or Write  
Description  
0h  
R/W  
Head pointer of the receive  
channel queue.  
1h  
RX_CH_TAIL  
R/W  
Tail pointer of the receive  
channel queue.  
9.4.1.1 RX_CH_HEAD (Internal Structure)  
Offset: 0h (0h byte)  
Type: Read/Write  
Format: Refer to the following table.  
Field (Bits)  
Description  
No RAM is present in these bit positions.  
Not present  
(31:16)  
RX_QUEUE_HEAD  
(15:0)  
The head of the channel queue.  
9.4.1.2 RX_CH_TAIL (Internal Structure)  
Offset: 1h (4h byte)  
Type: Read/Write  
Format: Refer to the following table.  
Field (Bits)  
Description  
No RAM is present in these bit positions.  
Not present  
(31:16)  
RX_QUEUE_TAIL  
(15:0)  
The tail of the channel queue.  
196  
 
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