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COM20051+のメーカーはSMSC Corporationです、この部品の機能は「Integrated Microcontroller and Network Interface」です。 |
部品番号 | COM20051+ |
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部品説明 | Integrated Microcontroller and Network Interface | ||
メーカ | SMSC Corporation | ||
ロゴ | |||
このページの下部にプレビューとCOM20051+ダウンロード(pdfファイル)リンクがあります。 Total 30 pages
COM20051+
www.DataSheet4U.com
Integrated Microcontroller and Network
Interface with Watchdog Timer and A/D
Converter Interface
FEATURES
• Low Cost
• Microcontroller Based on Popular 8051
• 5 Mbps to 156 Kbps Network Data Rate
Architecture
• Network Interface Supports RS-485,
• Intel 8051 Code Compatible
Twisted Pair, Coaxial, and Fiber Optic
• 68 Pin PLCC
Interfaces
• Network Supports up to 255 Nodes
• Receive All Mode Allows Any Packet to Be
• Powerful Network Diagnostics
Received
• Maximum 512 Byte Packets
• On-Board Programmable Watchdog Timer
• Duplicate Node ID Detection
• Analog Data Acquisition Port
• Self-Configuring Network Protocol
• Retains all 8051 Peripherals Including
- Interfaces to Any A/D Converter up to
16 Bits Wide
Serial I/O and Two Timers
- Sampling Rates from 1 s to 100ms
• Utilizes ARCNET® Token Bus Network
Engine
Possible
- Decouples 80C32 from Repetitive
• Requires No Special Emulators
Sampling Tasks
GENERAL DESCRIPTION
The COM20051+ is a low-cost, highly-integrated
microcontroller incorporating a high-
performance network controller based on the
ARCNET Token Bus Standard (ANSI 878.1).
The COM20051+ is based around the popular
Intel 8051 architecture. The device is
implemented using a microcontroller core
similar to the Intel 80C32 ROMless version of
the 8051 architecture. The COM20051+ is ideal
for distributed control networking applications
such as those found in industrial/machine
controls, building/factory automation, consumer
products, instrumentation, and automobiles.
The COM20051+ contains many features that
are beneficial for embedded control
applications. The microcontroller is a fully-
functional 16MHz 80C32 that is comparable to
the Intel 80C32. In contrast to other embedded
controller/networking solutions, the COM20051+
adds a fully-featured, robust, powerful, and
simple network interface, watchdog timer, and
data acquisition port, while retaining all of the
basic 8051 peripherals, such as the serial port
and counter/timers.
1 Page 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
P1.6
P1.7
RESET
N/C
N/C
VCC
N/C
VSS
N/C
P3.0
N/C
nPULSE1
P3.1
P3.2
P3.3
P3.4
P3.5
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
10 60
11 59
12 58
13 57
14 56
15 55
16
17
COM20051+
54
53
18 52
19 51
20 50
21 49
22 48
23 47
24 46
25 45
26 44
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
P0.5
P0.6
P0.7
nEA/EMUL
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
TXEN
ALE
nPSEN
P2.7
P2.6
Package: 68-Pin PLCC
3
3Pages PIN NO.
56-49
33
34
36
35
32
67
68
15,66
NAME
Analog Data
Acquisition
Parallel Data
Input
Start
Conversion
nEnd of
Conversion
Low Buffer
Enable
High Buffer
Enable
Turbo
nNode ID Chip
Select
Transmit
Activity
Power Supply
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
DESCRIPTION
ADC0-7
Input.
START
nEOC
LBE
HBE
TURBO
nNIDCS
TXLED
VCC
Output. Strobe to the external A/D converter.
Input. Signal from the external A/D converter.
Output. Multiplexes low byte of a 16-bit A/D
converter onto the 8-bit ADC bus.
Output. Multiplexes the high byte of a 16-bit A/D
converter onto the 8-bit ADC bus.
Input. Determines the 80C32's operating
frequency. When grounded, the internal 80C32
operates at 10MHz. When open, the processor
operates at 16MHz.
Output. Goes low whenever offset x08 is
addressed. For use in conjuction with Node ID
switches.
Output. Open drain.
+5V power supply.
6
6 Page | |||
ページ | 合計 : 30 ページ | ||
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部品番号 | 部品説明 | メーカ |
COM20051 | Integrated Microcontroller and ARCNET (ANSI 878.1) Interface | SMSC Corporation |
COM20051+ | Integrated Microcontroller and Network Interface | SMSC Corporation |
COM20051I | Integrated Microcontroller and ARCNET (ANSI 878.1) Interface | SMSC Corporation |