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參數(shù)資料
| 型號： | MX98905BFC |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | The MX98905 is designed for easy implementation of CSMA/CD local area networks, |
| 中文描述： | 該MX98905是專為易于實現(xiàn)的多址/光盤局域網(wǎng)， |
| 文件頁數(shù)： | 6/86頁 |
| 文件大?。?/td> | 352K |
| 代理商： | MX98905BFC |
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6
P/N: PM0365
REV. 1.3, NOV 20 ,1995
MX98905B
B. NETWORK INTERFACE
SYMBOL
PIN TYPE
PIN NUMBER
DESCRIPTION
POLEDL
O
2
POLARITY LED: Active-low signal. When the MX98905 detects
seven consecutive link pulses or three consecutive received packets
with reversed polarity, POLEDL is asserted.
TXLEDL
O
5
TRANSMIT LED: Active-low signal. It is asserted for approximately
50ms whenever the MX98905 transmits data in either AUI or TPI
modes.
RXLEDL
O
4
RECEIVE LED: Active-low signal. An open-drain output. It is
asserted for approximately 50ms whenever valid received data is
detected while in AUI or TPI modes.
COLEDL
O
3
COLLISION LED: An open-drain active-low signal. It is asserted for
approximately 50ms whenever collision is detected while in AUI or
TPI modes.
GDLINKL
O
1
GOOD LINK LED: An open-drain active-low signal. Used to display
link integrity status.
OFF (when high):
A.
MX98905 is in AUI mode
B.
MX9805E is in TPI mode, link testing is enabled and link integrity
is bad.
ON (when low):
A.
Link testing is disabled
B.
Link testing is enabled and link integrity is good.
X1
I
7
Crystal or external oscillator input.
X2
O
8
CRYSTEL FEEDBACK OUTPUT: Used in crystal connection only.
Should be left completely unconnected when using an oscillator
module.
THIN
O
10
THIN CABLE: Active-high signal. It is high when the MX98905 is
configured for thin cable (program PHY1 and PHY0 of Configuration
B). This signal can be used to turn on the DC-DC converter required
by thin Ethernet.
TXODP,
TXOM,
TXOP,
TXODM
O
156-153
TWISTED-PAIR TRANSMIT OUTPUTS: These high-drive CMOS
level outputs are resistively combined external to the chip to produce
a differential output signal with equalization to compensate for inter-
symbol interference (ISI) on the twisted-pair medium.
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