參數(shù)資料
型號: AM79C970
廠商: Advanced Micro Devices, Inc.
英文描述: PCnetTM-PCI Single-Chip Ethernet Controller for PCI Local Bus
中文描述: PCnetTM - PCI單芯片以太網(wǎng)控制器的PCI總線
文件頁數(shù): 157/168頁
文件大?。?/td> 943K
代理商: AM79C970
AMD
1-1024
Am79C970
C7: After filling the second buffer and performing the
last chance lookahead to the next descriptor, the
PCnet-PCI controller will write the status and
change the ownership bit of descriptor number 2.
S6: After the ownership of descriptor number 2 has
been changed by the PCnet-PCI controller, the
next driver poll of the 2nd descriptor will show
ownership granted to the CPU. The driver now
copies the data from buffer number 2 into the mid-
dle section of the application buffer space. This
operation is interleaved with the C7 and C8
operations.
C8: The PCnet-PCI controller will perform data DMA
to the last buffer, whose pointer is pointing to ap-
plication space. Data entering the last buffer will
not need the infamous double copy that is required
by existing drivers, since it is being placed directly
into the application buffer space.
N2: The message on the wire ends.
S7: When the driver completes the copy of buffer
number 2 data to the application buffer space, it
begins polling descriptor number 3.
C9: When the PCnet-PCI controller has finished all
data DMA operations, it writes status and changes
ownership of descriptor number 3.
S8: The driver sees that the ownership of descriptor
number 3 has changed, and it calls the application
to tell the application that a frame has arrived.
S9: The application processes the received frame and
generates the next TX frame, placing it into a TX
buffer.
S10: The driver sets up the TX descriptor for the
PCnet-PCI controller.
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相關代理商/技術參數(shù)
參數(shù)描述
AM79C970A 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970AKC 制造商:AMD 制造商全稱:Advanced Micro Devices 功能描述:PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
AM79C970AKC\\W 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Advanced Micro Devices 功能描述:
AM79C970AKC\W 制造商:Rochester Electronics LLC 功能描述:- Bulk