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STE10A bảng dữ liệu(PDF) 19 Page - STMicroelectronics

tên linh kiện STE10A
Giải thích chi tiết về linh kiện  PCI 10/100 Ethernet controller with integrated PHY (3.3V)
PDF  82 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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STE10A bảng dữ liệu(HTML) 19 Page - STMicroelectronics

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STE10/100A
Functional description
19/82
3.4
Receive scheme and receive early interrupt scheme
The following figure shows the difference of timing without early interrupt and with early
interrupt.
Figure 12.
Receive data flow (without early interrupt and with early interrupt)
Figure 13.
Detailed receive early interrupt flow
Incoming packet
Receive FIFO operation
FIFO-to-host memory operation
Interrupt
Driver read header
Higher layer process
Driver read the rest data
Receive early interrupt
Higher layer process (early)
Time
: without early interrupt
: with early interrupt
Driver read the rest data
Finish time
Finish time
Driver read header (early)
PC00357
FIFO-to-host memory operation
Receive early interrupt
Driver read header (early)
Higher layer process (early)
Driver read the rest data
Finish
1st
descriptor
full
2descriptor
The size of 1st
descriptor is
programmed as the
header size in
advance
Issue 2
interrupt at end
of packet
Time
PC00358



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