Datenblatt-pdf.com


COM2002IP Schematic ( PDF Datasheet ) - SMSC Corporation

Teilenummer COM2002IP
Beschreibung COM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAM
Hersteller SMSC Corporation
Logo SMSC Corporation Logo 




Gesamt 30 Seiten
COM2002IP Datasheet, Funktion
COM20020 3.3V
COM20020 3.3V ULANC
Universal Local Area Network Controller
with 2K x 8 On-Board RAM
FEATURES
!" New Features
- Data Rates up to 5 Mbps
- Programmable Reconfiguration Times
!" 24 Pin DIP, 28 Pin PLCC Package
!" Ideal for Industrial/Factory/Building
Automation and Transportation
Applications
!" Deterministic, (ANSI 878.1), Token Passing
ARCNET Protocol
!" Minimal Microcontroller and Media
Interface Logic Required
!" Flexible Interface For Use With All
Microcontrollers or Microprocessors
!" Automatically Detects Type of
Microcontroller Interface
!" 2Kx8 On-Chip Dual Port RAM
!" Command Chaining for Packet Queuing
!" Sequential Access to Internal RAM
!" Software Programmable Node ID
!" Eight, 256 Byte Pages Allow Four Pages TX
and RX Plus Scratch-Pad Memory
!" Next ID Readable
!" Internal Clock Scaler and Clock Multiplier for
Adjusting Network Speed
!" Operating Temperature Range of -40oC to
+85oC
!" Self-Reconfiguration Protocol
!" Supports up to 255 Nodes
!" Supports Various Network Topologies (Star,
Tree, Bus...)
!" CMOS, Single +3.3V Supply
!" Duplicate Node ID Detection
!" Powerful Diagnostics
!" Receive All Packets Mode
!" Flexible Media Interface:
- Traditional Hybrid Interface For Long
Distances up to Four Miles at 2.5Mbps.
- RS485 Differential Driver Interface For
Low Cost, Low Power, High Reliability
ORDERING INFORMATION
Order Numbers:
COM20020ILJP3V
28 PLCC Package
COM20020IP3V
24 DIP Package






COM2002IP Datasheet, Funktion
DIP PIN
NO.
16,15
PLCC PIN
NO.
19,18
NAME
nPulse 2,
nPulse 1
17 20 Receive In
18 21 nTransmit
nEnable
13,14
16,17
Crystal
Oscillator
24
15,28
Power
Supply
12 7,14,22 Ground
SYMBOL
nPULSE2,
nPULSE1
RXIN
nTXEN
XTAL1,
XTAL2
VDD
DESCRIPTION
Output (nPULSE1), Input/Output (nPULSE2).
In Normal Mode, these active low signals
carry the transmit data information, encoded
in pulse format, as DIPULSE waveform.
When the device is in Backplane Mode, the
nPULSE1 signal driver is programmable
(push/pull or open-drain), while the nPULSE2
signal provides a clock with frequency of
double the data rate. nPULSE1 is connected
to a weak internal pull-up resistor on the
open/drain driver in backplane mode.
Input. This signal carries the receive data
information from the line tranceiver.
Output. This signal is used prior to the Power-
up to enable the line drivers for transmission.
The polarity of the signal is programmable
through the nPULSE2 pin.
nPULSE2 floating before Power-up: nTXEN
active low (Default option)
nPULSE2 grounded before Power-up:
nTXEN active high (This option is only
available in Backplane Mode)
An external crystal should be connected to
these pins. Oscillation frequency range is
from 10 to 20 MHz. If an external TTL clock is
used instead, it must be connected to XTAL1
with a 390! pull-up resistor, and XTAL2
should be left floating.
+3.3 Volt Power Supply pin.
VSS Ground pin.
6

6 Page









COM2002IP pdf, datenblatt
Acknowledgements
An Acknowledgement is used to acknowledge
reception of a packet or as an affirmative
response to FREE BUFFER ENQUIRIES and is
sent by the following sequence:
#$ An ALERT BURST
#$ An ACK (ACKnowledgement--ASCII code
86H) character
ALERT BURST
ACK
Negative Acknowledgements
A Negative Acknowledgement is used as a
negative response to FREE BUFFER
ENQUIRIES and is sent by the following
sequence:
#$ An ALERT BURST
#$ A NAK (Negative Acknowledgement--ASCII
code 15H) character
ALERT BURST
NAK
12

12 Page





SeitenGesamt 30 Seiten
PDF Download[ COM2002IP Schematic.PDF ]

Link teilen




Besondere Datenblatt

TeilenummerBeschreibungHersteller
COM2002IPCOM20020 3.3V ULANC Universal Local Area Network Controller with 2K x 8 On-Board RAMSMSC Corporation
SMSC Corporation

TeilenummerBeschreibungHersteller
CD40175BC

Hex D-Type Flip-Flop / Quad D-Type Flip-Flop.

Fairchild Semiconductor
Fairchild Semiconductor
KTD1146

EPITAXIAL PLANAR NPN TRANSISTOR.

KEC
KEC


www.Datenblatt-PDF.com       |      2020       |      Kontakt     |      Suche