COM20020I3V-DZD-TR Standard Microsystems (SMSC), COM20020I3V-DZD-TR Datasheet - Page 3

• Manufacturer Part Number: COM20020I3V-DZD-TR
• Manufacturer: Standard Microsystems (SMSC)

Specifications of COM20020I3V-DZD-TR

• Number Of Transceivers: 1
• Operating Supply Voltage (typ): 3.3V
• Operating Temperature (max): 85C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 28
• Lead Free Status / RoHS Status: Compliant

5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
Figure 1 - COM20020I OPERATION ...........................................................................................................................10
Figure 2 - MULTIPLEXED, 8051-LIKE BUS INTERFACE WITH RS-485 INTERFACE ...............................................16
Figure 3 - NON-MULTIPLEXED, 6801-LIKE BUS INTERFACE WITH RS-485 INTERFACE......................................17
Figure 4 - HIGH SPEED CPU BUS TIMING - INTEL CPU MODE...............................................................................18
Figure 5 - COM20020I NETWORK USING RS-485 DIFFERENTIAL TRANSCEIVERS................................................20
Figure 6 - DIPULSE WAVEFORM FOR DATA OF 1-1-0 .............................................................................................20
Figure 7 - INTERNAL BLOCK DIAGRAM ....................................................................................................................22
Figure 8 – SEQUENTIAL ACCESS OPERATION........................................................................................................35
Figure 9 – RAM BUFFER PACKET CONFIGURATION ..............................................................................................38
Figure 10 - COMMAND CHAINING STATUS REGISTER QUEUE ...............................................................................40
Figure 11 - MULTIPLEXED BUS, 68XX-LIKE CONTROL SIGNALS; READ CYCLE ..................................................48
Figure 12 - MULTIPLEXED BUS, 80XX-LIKE CONTROL SIGNALS; READ CYCLE ..................................................49
Figure 13 - MULTIPLEXED BUS, 68XX-LIKE CONTROL SIGNALS; WRITE CYCLE.................................................50
SMSC COM20020I 3.3V
5.1
5.2
5.3
5.4
5.5
5.6
6.1
6.2
7.1
7.2
7.3
7.4
7.5
7.6
8.1
8.2
12.1
GENERAL DESCRIPTION..............................................................................................................................5
PIN CONFIGURATIONS .................................................................................................................................6
DESCRIPTION OF PIN FUNCTIONS FOR TQFP ..........................................................................................8
PROTOCOL DESCRIPTION .........................................................................................................................11
SYSTEM DESCRIPTION...............................................................................................................................15
FUNCTIONAL DESCRIPTION ......................................................................................................................24
OPERATIONAL DESCRIPTION ...................................................................................................................45
TIMING DIAGRAMS......................................................................................................................................48
PACKAGE OUTLINES..................................................................................................................................60
APPENDIX A.................................................................................................................................................62
APPENDIX B.................................................................................................................................................65
N
D
N
B
E
L
M
T
M
INTERNAL REGISTERS...........................................................................................................................25
I
C
I
I
M
D
S
NTERNAL
NITIALIZATION
MPROVED
INE
RANSMISSION
ROADCAST
XTENDED
OFTWARE
ETWORK
ATA
ETWORK
OMMAND
C
ICROCONTROLLER
ICROSEQUENCER
AXIMUM
E
P
LECTRICAL
R
ROTOCOL
ATES
R
G
P
R
D
C
T
I
AM
UARANTEED
ROTOCOL
ECONFIGURATION
DENTIFICATION OF THE
IAGNOSTICS
M
IMEOUT
HAINING
...............................................................................................................................................11
S
ESSAGES
M
............................................................................................................................................35
EQUENCE
C
..........................................................................................................................................13
EDIA
HARACTERISTICS
......................................................................................................................................24
I
F
....................................................................................................................................40
NTERFACE
..................................................................................................................................11
UNCTION
I
NTERFACE
...............................................................................................................................12
R
..............................................................................................................................42
ATINGS
............................................................................................................................42
.......................................................................................................................12
TABLE OF CONTENTS
.....................................................................................................................12
....................................................................................................................15
* ................................................................................................................45
.................................................................................................................19
COM20020I R
...............................................................................................................45
DATASHEET
LIST OF FIGURES
Page 3
EV
B, R
EV
C
AND
R
EV
D .....................................................65
Revision 12-06-06