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參數(shù)資料
| 型號： | MB86965A |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 |
| 封裝： | PLASTIC, QFP-160 |
| 文件頁數(shù)： | 38/76頁 |
| 文件大小： | 394K |
| 代理商： | MB86965A |
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MB86965
43
Figure 11. Transmit Buffer
As shown in Figure 11, system software can be used to
program and partition buffer memory into transmit and
receive buffer areas for optimum operation and for
system configurations that accommodate a wide range of
application demands. The transmit and receive buffer
areas can allocate varying proportions of space to the
transmit and receive functions.
Total EtherCoupler buffer memory size is configurable
as 8, 16, 32 or 64 kbytes, including transmit and receive
spaces. The buffer memory Transmitter section is
configurable as a single, 2-kilobyte buffer or as a pair of
2, 4, or 8-kilobyte banks. Therefore, total size of the
Transmit buffer space can be either 2, 4, 8 or 16 kbytes.
Within each buffer or bank, the system writes one or more
packets until available space is too small for another
packet. Once begun, the Transmitter automatically
transmits buffer packets, then finishes with a status update
and interrupt. One bank of a two-bank configuration
transmits while the other loads. The use of dual buffers,
multiple-packet loading, and chaining produces the
highest transmission rate, which boosts performance to
accommodate systems that need high-throughput trans-
mission.
EtherCoupler automatically configures memory as a ring
buffer and allocates unused Transmitter memory to the
Receiver. Like the Transmit buffer, the Receive buffer
stores packets head-to-toe, but does so until reaching the
end of the linear addressing space, where the
EtherCoupler Receive-Write pointer then returns to the
top of the receive addressing range, forming an
apparently seamless ring with packets aligned on an
8-byte boundary. As packets read out to the system, the
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相關(guān)代理商/技術(shù)參數(shù) |
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| MB86965B | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:EtherCoupler ETHERNET CONTROLLER WITH 10BASE?T TRANSCEIVER |
| MB86965BPF-G-BND | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:EtherCoupler ETHERNET CONTROLLER WITH 10BASE?T TRANSCEIVER |
| MB86967 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces |
| MB86967PFV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:LAN Controller with PC Card, ISA Bus, and General-purpose Bus Interfaces |
| MB86977 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:IP PACKET FORWARDING ENGINE |
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