COM20019I3V 데이터 시트보기 (PDF) - SMSC -> Microchip

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COM20019I3V

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SMSC -> Microchip 

RAM

Cost Competitive ARCNET (ANSI 878.1) Controller with 2K x 8 On-Chip

Chapter 12 Appendix C

12.1 Software Identification of the COM20019I 3V Rev B and Rev C

In order to properly write software to work with the COM20019I 3V Rev B and C it is necessary to be able to identify the

different revisions of the part.

To identify the COM20019I 3V Revision follow the following procedure:

1. Write 0x00 to Register-5

2. Read Register-5 Æ The value read from Register-5 must be 0x00.

3. Write 0xC0 to Register-5

4. Read Register-5*

* If the value read from Register-5 is 0x80 then the part is a COM20019I 3V Rev B

* If the value read from Register-5 is 0xC0 then the part is a COM20019I 3V Rev C

Rev. 10-31-06

Page 70

DATASHEET

SMSC COM20019I 3.3V Rev.C

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