EM200 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 EM200
기능 Ethernet Module
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EM200 데이터시트, 핀배열, 회로
EM200 Ethernet Module
The EM200 is an Ethernet Module for onboard installation. Module hardware includes
one 100BaseT Ethernet port (standard Ethernet magnetics are NOT integrated into
the Module), one serial port (CMOS-level) with a number of additional general-
purpose I/O lines, and an internal processor, whose firmware acts as a bridge
between the Ethernet and serial ports. Ethernet "side" of the Module connects
directly to a standard Ethernet magnetics circuit (such as YCL-PH163112) or RJ45
connector with integrated magnetics. Serial "side" interfaces directly to the serial
port pins of most microcontrollers, microprocessors, UARTs, etc.
From the hardware standpoint, the EM200 can be viewed as a universal platform
suitable for running a variety of network and serial communications-related
applications. It is the application firmware, not hardware that gives the EM200 most
of its functionality.
The Application firmware EM200 is supplied with, currently in its 3rd generation
("Release3"), turns the EM200 into a Serial Device Server used to connect serial
devices to the Ethernet (TCP/IP) networks.
The application firmware of the EM200 can be upgraded through the module's serial
port or Ethernet port. Serial upgrades are facilitated by a so-called Monitor- a fixed
"service" firmware inside the EM200. The Monitor cannot be upgraded. Network
upgrades rely on the application firmware itself- there is a self upgrade algorithm
that will be detailed later.
Since most of the EM200's operation is defined by its firmware the major part of the
EM200's functional description can be found in the
Device Server Application Firmware Manual. This EM200 Ethernet Module Manual
focuses on the hardware portion of the EM200.
©2000-2004 Tibbo Technology Inc.

EM200 pdf, 반도체, 판매, 대치품
Hardware Manuals 26
Logical signals on the serial port lines of the EM200 are active LOW. TX and RX lines
are high when idle, start bit is LOW, stop bit is HIGH; LOW on CTS and RTS lines
means "transmission allowed" and HIGH means "transmission not allowed". This is
standard for CMOS-level serial ports and is exactly opposite to the signalling on the
RS232 cables. Logical signals on the EM200 are inverted because standard interface
ICs* invert the signals internally too.
As explained earlier, actual functionality of the I/O lines is firmware-dependent. See
serial port and serial communications for details.
* Such as MAX232 for RS232, MAX485 for RS485, etc.
LED lines
L3 (SG)
L4 (SR)
Green Ethernet status LED
Yellow Ethernet status LED
LED output 3, Green status LED
LED output 4, Red status LED
Line functions defined by the application firmware are shown in blue
The EM200 has four LED control lines. All lines have the same internal structure and
the LEDs should be connected to these lines as shown on the schematic diagram
below. Maximum load for each line is 10mA.
EG and EY lines reflect the status of the Ethernet port. The EG LED is switched on
whenever a live Ethernet connection is detected by the EM200's Ethernet port. The
EG LED is momentarily switched off whenever the EM200 receives a network packet.
The EY shows whether current Ethernet link is of 10BaseT type (EY off) or
100BaseT (EY on).
SG and SR lines are under firmware control and display various status information
depending on what firmware is running at the moment. Follow the links below to
learn more about the behaviour of these LEDs under different conditions:
· SR/SG behavior in the monitor firmware.
· SR/SG behavior in the application firmware.
©2000-2004 Tibbo Technology Inc.


EM200 전자부품, 판매, 대치품
29 Tibbo Document System
* Maximum possible buffer size. Actual size may be smaller depending on how
much RAM is "consumed" by the firmware
** As measured on top of the device


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