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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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COM20020ILJP датащи(PDF) 72 Page - Microchip Technology |
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COM20020ILJP датащи(HTML) 72 Page - Microchip Technology |
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72 / 72 page  5Mbps ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip RAM Datasheet Revision 12-05-06 Page 72 SMSC COM20020I Rev D DATASHEET Appendix C - Software Identification of the COM20020 Rev B, Rev C and Rev D In order to properly write software to work with the COM20020 Rev B, C and D it is necessary to be able to identify the different revisions of the part. To identify the COM20020 Revision follow the following procedure: 1. Write 0x98 to Register-6 (Address = 6) 2. Write 0x02 to Register-5 (Address = 5) 3. Read Register-6 * If the value read from Register-6 is 0x98 then the part is a COM20020 Rev B or earlier * If the value read from Register-6 is 0x9A then go to next step below 4. Write 0x80 to Register-5 5. Read Register-5 * If the value read from Register-5 is 0x00 then the part is a COM20020 Rev C * If the value read from Register-5 is 0x80 then the part is a COM20020 Rev D |
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