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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)： | 43/76頁 |
| 文件大小： | 394K |
| 代理商： | MB86965A |
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MB86965
48
0.1
F
0.1
F
Figure 15. Typical Connections
DATA ENCODER
EtherCoupler serializes the data for transmission, and
converts each bit to Manchester Code, the format used on
the network media. Manchester Code for a one is a
100-nanosecond interval starting with a low, ending with
a high, with a low-to-high transition at the 50-nanosec-
ond point; Manchester Code for a zero is the inverse.
TRANSMIT PACKET PROCESSING
When transmitting one or more packets, the host system
first loads the packets into a transmit buffer. The packets
are preceded by a two-byte header giving their lengths,
and are written to Buffer Memory Port registers BMPR8
and BMPR9. The system loads only packet destination
address, source address, length field and data field;
EtherCoupler generates the rest. When the packets load,
the system turns on the Transmitter to initiate
transmission, enabling EtherCoupler to transmit. Ob-
serving the media access protocol, EtherCoupler delays
transmitting until the absence of carrier from other nodes
or intervals for minimum interpacket gap and backoff,
and then begins to transmit. EtherCoupler, which
serializes and encodes data as Manchester code, generates
the Preamble field at the beginning and calculates and
appends the CRC field at the end, followed by the
non-Manchester End-Of-Packet delimiter.
Figure 15, which shows typical connections to an
EEPROM and the LEDs, also indicates typical
interfacing to the AUI cable. The Manchester-encoded
signals are output to transmitter data pins DOP and DON
through a differential driver, which can drive a 50-meter
segment of 78
transceiver cable as specified in the
8802-3 standard.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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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