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COM20051+ Fiches technique(PDF) 3 Page - SMSC Corporation

No de pièce COM20051+
Description  Integrated Microcontroller and Network Interface with Watchdog Timer and A/D Converter Interface
Download  92 Pages
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Fabricant  SMSC [SMSC Corporation]
Site Internet  http://www.smsc.com
Logo SMSC - SMSC Corporation

COM20051+ Fiches technique(HTML) 3 Page - SMSC Corporation

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3
In
addition,
the
COM20051+
supports
an
Emulation Mode that permits the use
of a
standard 80C32 emulator in conjunction with the
COM20051+ to develop software drivers for the
network core.
This mode is achieved by
mapping the ARCNET network core into a 256-
byte page of the External Data Memory space of
the 80C32 instead of the SFR area, which would
require a costly adapter for the emulator.
The networking core is based around an
ARCNET
Token
Bus
protocol
engine
that
provides
highly-reliable
and
fault
tolerant
message
delivery
at
data
rates
ranging
from 5Mbps down to 156 Kbps with message
sizes varying
from
1
to
508
bytes.
The
ARCNET protocol offers a simple, standardized,
and easily-understood networking solution for
any application. The network interface supports
several media interfaces, including RS-485,
coaxial, and twisted pair in either bus or star
topologies. The network interface incorporates
powerful
diagnostic
features
for
network
management and fault isolation. These include
duplicate node ID detection, reconfiguration
detection, receive all (monitor) mode, receiver
activity, and token detection.
ARCNET is a registered trademark of Datapoint Corporation
PIN CONFIGURATION
Package: 68-Pin PLCC
9
8
7 6
5
4
3
2
1
68 67 66 65 64 63 62 61
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
10
11
12
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14
15
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23
24
25
26
44
45
46
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60
COM20051+
P0.5
P0.6
P0.7
nEA/EMUL
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
TXEN
ALE
nPSEN
P2.7
P2.6
P1.6
P1.7
RESET
N/C
N/C
VCC
N/C
VSS
N/C
P3.0
N/C
P3.1
P3.2
P3.3
P3.4
P3.5
nPULSE1


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