- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45179 > MB86965A 2 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PQFP16 PDF資料下載
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)： | 51/76頁 |
| 文件大?。?/td> | 394K |
| 代理商： | MB86965A |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁
MB86965
55
Figure 21. Collision Detection Function
POLARITY REVERSE FUNCTION
The Transceiver
polarity reverse function uses link
pulses and end-of-frame data to determine the polarity of
received signals. A reversed polarity condition is detected
when eight opposite receive link pulses are detected,
without receiving of a link pulse of the expected polarity.
Reversed polarity is also detected if four frames are
received with a reversed start-of-idle. Whenever polarity
is reversed, these two counters are reset to zero. If the
Transceiver enters the link fail state and no valid data or
link pulses are received within 96 to 128 milliseconds,
polarity resets to the default uninverted condition. If Link
Integrity Testing is disabled, polarity detection is based
only on received data. Polarity correction is always
enabled.
COLLISION DETECTION FUNCTION
The collision detection function operates on the
twisted-pair side of the interface. A collision is defined as
the simultaneous presence of valid signals on both the
TPI circuit and the TPO circuit. The Transceiver reports
collisions to the back-end via the COL pin. If the TPI
circuit is active while there is activity on the TPO circuit,
the TPI data passes to the back-end as received data,
disabling normal loopback. Figure 21 is a state diagram
of the collision detection function.
TWISTED-PAIR LOOPBACK FUNCTION
EtherCoupler provides the normal loopback function
specified by the 10BASE-T standard for the twisted-pair
port. The loopback function operates in conjunction with
the transmit function. Data transmitted by the Transmit
State Machine is internally looped back within
EtherCoupler before the TPO drivers to the Manchester
decoder and returned to the Receive State Machine. The
normal loopback function is disabled when a data
collision occurs, clearing the received data circuit in the
Transceiver for the twisted-pair input data. The normal
loopback is also disabled during the link fail and jabber
states.
EtherCoupler provides additional loopback functions
controlled by LBC bit, DLCR4<1>. When the
twisted-pair port is selected and LBC is set high, the
twisted-pair loopback is forced to override collisions on
the twisted-pair circuit. Normal loopback is in effect
when LBC is set low. When the AUI port is selected and
LBC is set high, data transmitted by the back-end
internally loops back from the Transmit Data pin through
the Manchester encoder/decoder to the Receive Data pin.
When LBC is set low, no AUI loopback occurs.
AUTOMATIC PULSE-STRETCHING FUNCTION
EtherCoupler incorporates open-drain drivers to provide
signals to each LED that indicates packet reception,
transmission, collision, and linking. The chip provides
automatic stretching of pulses to allow perception by the
human eye of the presence of packets — as they are being
processed for each function — despite true rates which
would be too fast to visibly indicate state changes.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MB88151APNF-G-500-JNE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-401-JNEFE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-801-JNERE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-400-JNERE1 | OTHER CLOCK GENERATOR, PDSO8 |
| MB88151APNF-G-200-JNEFE1 | OTHER CLOCK GENERATOR, PDSO8 |
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 |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。