Understanding Bit Settings - Keithley 2450 Reference Manual

Interactive sourcemeter instrument

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Model 2450 Interactive SourceMeter® Instrument Reference Manual

Understanding bit settings

When you write to or read a status register, you can use binary, decimal, or hexadecimal values to

represent the binary values of the bit states. When the value is converted to its binary equivalent, you

can determine which bits are set on or clear. Zero (0) indicates that all bits are clear.

In the Model 2450, the least significant bit is always bit B0. The most significant bit differs for each

Bit position

Binary value

Decimal value

Bit position

Binary value

Decimal value

For example, if a value of 1.29000e+02 (which is 129) is read as the value of the condition register,

the binary equivalent is 0000 0000 1000 0001. This value indicates that bit B0 and bit B7 are set and

all other bits are cleared.

For example, if you read a value of 1.22880e+04 (12,288) for the condition register, the binary

equivalent is 0011 0000 0000 0000. This value indicates that bits B12 and B13 are set.

When bit B12 (4096) and bit B13 (8192) are set (1), the decimal equivalent is 4096 + 8192 = 12,288.

2450-901-01 Rev. B/September 2013

16384 8192 4096 2048 1024 512 256 128

Appendix C: Status model