參數(shù)資料
型號(hào): DS3131
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: Telecom IC:Other
英文描述: SPECIALTY TELECOM CIRCUIT, PBGA256
封裝: 27 X 27 MM, PLASTIC, BGA-256
文件頁數(shù): 3/174頁
文件大?。?/td> 1261K
代理商: DS3131
DS3131
100 of 174
Figure 9-11. Transmit DMA Memory Organization
Free Data Buffer Space
Transmit Pending-Queue Descriptors:
Contains Index Pointers to Packet
Descriptors of Queued Data Buffers that
are Ready to be Transmitted
Up to 64k dwords
Free-Queue Descriptors Allowed
Pending-Queue Base Address (32)
Pending-Queue End Address (16)
Pending-Queue Host Write Pointer (16)
Pending-Queue DMA Read Pointer (16)
Done-Queue Base Address (32)
Done-Queue End Address (16)
Done-Queue DMA Write Pointer (16)
Done-Queue Host Read Pointer (16)
Descriptor Base Address (32)
Used Data Buffer Space
Main Offboard Memory
(32-Bit Address Space)
Internal BoSS Registers
Transmit Done-Queue Descriptors:
Contains Index Pointers to Packet
Descriptors of Data Buffers that have
been Transmitted
Up to 64k dwords
Done-Queue Descriptors Allowed
Transmit Packet Descriptors:
Contains 32-Bit Addresses to Data
Buffers as well as Status/Control
Information and Links to Other Packet
Descriptors
Up to 64k quad dwords
Descriptors Allowed
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