COM20022I3V-HD SMSC, COM20022I3V-HD Datasheet - Page 41

• Manufacturer Part Number: COM20022I3V-HD
• Description: Network Controller & Processor ICs ARCNET Contrllr
• Manufacturer: SMSC

Specifications of COM20022I3V-HD

• Data Rate: 10 Mbps
• Supply Voltage (max): 3.465 V
• Supply Voltage (min): 3.135 V
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-48
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10 Mbps ARCNET (ANSI 878.1) Controller with 2Kx8 On-Board RAM
Datasheet
SMSC COM20022I 3V
BIT
4,3
1,0
2
Extended
Timeout 1,2
Backplane
Sub Address 1,0
BIT NAME
ET1, ET2
BACK-
PLANE
SUBAD 1,0
SYMBOL
DATASHEET
These bits allow the network to operate over longer
distances than the default maximum 1 mile by controlling
the Response, Idle, and Reconfiguration Times. All nodes
should be configured with the same timeout values for
proper network operation. For the COM20022I 3V with a
20 MHz crystal oscillator, the bit combinations follow:
Note: These values are for
A logic "1" on this bit puts the device into Backplane Mode
signaling which is used for Open Drain and Differential
Driver interfaces.
These bits determine which register at address 07 may be
accessed. The combinations are as follows:
SUBAD1
See also the Sub Address Register.
ET2
0
0
1
1
Page 41
0
0
1
1
10Mbps and RCNTMR[1,0]=00.
Reconfiguration time is changed by the RCNTMR1
and RCNTMR0 bits.
ET1
0
1
0
1
SUBAD0
0
1
0
1
DESCRIPTION
Response
Time (μS)
298.4
149.2
74.7
18.7
Idle Time
Register
Tentative ID
Node ID
Setup 1
Next ID
(μS)
20.5
328
164
82
Reconfig
Time
(mS)
420
420
420
210
Revision 02-27-06