adc-44d ETC-unknow, adc-44d Datasheet - Page 51

• Manufacturer Part Number: adc-44d
• Description: Multi-function Analogue Input/output Card
• Manufacturer: ETC-unknow

Appendix A
APPENDIX A - NUMBERING SYSTEMS
Binary and Hexadecimal Numbers
The normal numbering system is termed DECIMAL because there are ten
possible digits (0 to 9) in any single column of numbers. Decimal numbers are
also referred to as numbers having a Base 10. When counting, the numbers
increment in the units column from 0 up to 9. The next increment resets the
units column to 0 and carries over 1 into the next column. This 1 indicates that
there has been a full ten counts (the base number) in the units column. The
second column is therefore termed the “tens” column.
It is more convenient when programming to use a number system that provides
a clearer picture of the hardware at an operational or register level. The two
most common number systems used are BINARY and HEXADECIMAL.
These two systems provide an alternative representation to decimal numbers.
For a binary number there are only 2 possible values (0 or 1) and as a result
binary numbering is often known as Base 2. When counting in binary numbers,
the number increments the units column from 0 to 1. At the next increment the
units column is reset to 0 and 1 is carried over to the next column. This column
indicates that a full two counts have occurred in the units column. Now the
second column is termed the “twos” column.
Hexadecimal numbers may have 16 values (0 to 9 followed by the letters A to
F). It is also known as a system with the Base 16. With this counting system
the units increment from 0 to 9 as with the decimal system, but at the next count
the units column increments from 9 to A and then B, C and so on up to F. After
F the units column resets to 0 and the next column increments from 0 to 1.
This 1 indicates that sixteen counts have occurred in the units column. The
second column is termed the “sixteens” column.
Blue Chip Technology Ltd.
Numbering Systems
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