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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)： | 52/76頁 |
| 文件大?。?/td> | 394K |
| 代理商： | MB86965A |
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MB86965
56
Figure 22. Link Integrity Function
LINK INTEGRITY TEST
Figure 22 is a state diagram of the link integrity test
function. The link integrity test determines the status of
the receive side twisted-pair cable. Link integrity testing
is enabled when Link Test En bit BMPR13<5> is set low.
When enabled, the Receiver recognizes the link integrity
pulses transmitted in the absence of receive traffic. If no
serial data stream or link integrity pulses are detected
within 50 to 150 milliseconds, EtherCoupler enters a
link-fail state and disables the transmit and normal
loopback functions. EtherCoupler ignores any link
integrity pulse with an interval less than 2 to 7
milliseconds. EtherCoupler remains in the link-fail state
until it detects either a serial data packet or two or more
link integrity pulses.
REMOTE SIGNALING
EtherCoupler transmits standard link pulses that meet the
10BASE-T specification. However, EtherCoupler en-
codes additional status information into the link pulse by
varying the link-pulse timing; this is referred to as
remote signaling. By using alternate pulse intervals,
EtherCoupler signals three binary conditions: Remote
Linkdown (RLD), Remote Jabber (RJAB), and Remote
Remote Port (RMT Port). EtherCoupler also recognizes
these alternate pulse intervals when received from a
remote unit. Remote status conditions are sensed by the
controller as RLD bit, BMPR15<7>, RJAB bit,
BMPR15<5> and RMT Port bit, BMPR15<4>.
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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 |
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| 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 |
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