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參數(shù)資料
| 型號： | EM2C |
| 英文描述： | ACPI Regulator/Controller for Dual Channel DDR Memory Systems; Temperature Range: 0°C to 70°C; Package: 28-QFN |
| 中文描述： | EM2C以太網收發(fā)器模塊與董事會隔離變壓器 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 124K |
| 代理商： | EM2C |
Ether Module - EM2C
10Base-2
MD400135/D
2
Description
The Thin Net module connects the station equipment to a
Thin Net (Cheapernet) COAX cable.
The on-board
83C92C CMOS COAX transceiver provides the drive
current and wave shaping for the transmit signals. It
supplies receive signal equalization, collision detection
and squelch.
Description of the Pin Functions
PIN #
FUNCTION
1 - 2
CD
± Collision Output. A balanced 10 MHz
differential output to the station equipment when
a collision is detected, when excessive data
transmission occurs (jabber), or during the
Collision Test (Heartbeat Test).
3, 4
RX
± Receive Data Output. Line Driver output to
the MCC Receive inputs.
11
V
EE
Negative Supply. Nominally –9 volts refer-
enced to COAX shield ground.
An on-board DC-DC power converter provides
–9 volt power for the on-board module , and DC
isolation from the station equipment to prevent
ground loop current.
5 - 6
TX
± Transmit Data Input. A balanced line re-
ceiver input to the module from the MCC for
transmit packets.
16
HBE Heartbeat Enable. This input enables
the Collision (also called Heartbeat) Test when
connected to ground, and disables the test when
connected to V
EE.
9
SYS GND Ground. System Ground is
referenced to V
CC.
18
RXI Network Signal Receiver. Connects to the
network COAX center conductor, and receives
packet data and detects the collision voltage
level.
17
TXO Network Signal Transmitter. Connects to
the network COAX center conductor through an
internal 1N916 diode, and transmits all signals
from the MCC to the network.
20
CDS Collision Detect Sense. Connects di-
rectly to the network shield, and references the
collision detection voltage level.
Figure 2. Ethernet Transceiver Module Pin Configuration
CD +
CD –
RX +
RX –
TX +
TX –
1
2
3
4
5
6
9
10
CDS
20
HBE
16
12
11
SYS GND
CC
VVEE
DM
RXI
18
17
TXO
[1]
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