COM20020I-HD SMSC, COM20020I-HD Datasheet - Page 69
COM20020I-HD
Manufacturer Part Number
COM20020I-HD
Description
Network Controller & Processor ICs ARCNET Contrllr
Manufacturer
SMSC
Datasheet
1.COM20020I-HT.pdf
(69 pages)
Specifications of COM20020I-HD
Product
Controller Area Network (CAN)
Number Of Transceivers
1
Data Rate
5 Mbps
Supply Voltage (max)
5.5 V
Supply Voltage (min)
4.5 V
Supply Current (max)
40 mA
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
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Chapter 12
12.1
In order to properly write software to work with the COM20020I 3V Rev D and E it is necessary to be able to identify
the different revisions of the part.
To identify the COM20020I 3V Revision follow the following procedure:
SMSC COM20020I 3.3V Rev.E
5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM
* If the value read from Register-5 is 0x80 then the part is a COM20020I 3V Rev D
* If the value read from Register-5 is 0xC0 then the part is a COM20020I 3V Rev E
1.
2.
3.
4.
Write 0x00 to Register-5
Read Register-5
Write 0xC0 to Register-5
Read Register-5*
Software Identification of the COM20020I 3V Rev D and Rev E
The value read from Register-5 must be 0x00.
Appendix C
DATASHEET
Page 69
Revision 09-11-06
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