protocol, a highly reliable and proven networking
scheme, and a data rate of up to 5 Mbps when
using the COM20020-5.
The integration of the 2Kx8 RAM buffer on-chip,
the Command Chaining feature, the 5 Mbps
maximum data rate, and the internal diagnostics
make the COM20020-5 the highest performance
industrial communications device available.
With only one COM20020-5 and one
A token-passing protocol provides predictable
response times because each network event
occurs within a predetermined time interval,
based upon the number of nodes on the
network. The deterministic nature of ARCNET
is essential in mission critical applications.
microcontroller,
a complete communications
node may be implemented.
ARCNET is a registered trademark of Datapoint Corporation
PIN CONFIGURATION
VDD
24
1
A0/nMUX
23
22
21
20
19
18
17
16
nRD/nDS
nWR/DIR
nCS
2
3
4
5
6
7
8
A1
A2/ALE
AD0
25 24 23 22 21 20 19
nWR/DIR
nPULSE 1
XTAL2
18
17
26
27
nRDn/DS
VDD
nINTR
AD1
16
15
XTAL1
28
1
nRESET IN
AD2
D3
nTXEN
RXIN
AO/nMUX
A1
VDD
VSS
D4
14
13
12
2
3
4
nPULSE2
D5
9
10
11
A2/ALE
AD0
N/C
D7
15
14
nPULSE1
XTAL2
D6
D7
5
6
7
8
9
10 11
13
12
VSS
XTAL1
Packages: 24-Pin DIP or 28-Pin PLCC
Ordering Information:
COM20020-5
P
PACKAGE TYPE: P = Plastic, LJP = PLCC
TEMP RANGE: (Blank) = Commercial: 0°C to +70°C
I = Industrial: -40°C to +85°C
DEVICE TYPE: 20020-5 = Universal Local Area Network Controller
(with 2K x 8 RAM)
3
SMSC [ SMSC CORPORATION ]
