Intel 87C196CB See interrupt service routine, See differential nonlinearity and nonlinearity

Models: 8XC196NT 87C196CB

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See interrupt service routine.

 

 

GLOSSARY

ISR

See interrupt service routine.

linearity errors

See differential nonlinearity and nonlinearity.

LONG-INTEGER

A 32-bit, signed variable with values from –2 31

 

 

through +231–1.

LSB

1) Least-significant bit of a byte or least-significant

 

 

byte of a word.

 

 

2) In an A/D converter, the reference voltage divided

 

 

by 2n, where n is the number of bits to be converted.

 

 

For a 10-bit converter with a reference voltage of 5.12

 

 

volts, one LSB is equal to 5.0 millivolts (5.12 ÷ 210).

maskable interrupts

All interrupts except unimplemented opcode,

 

 

software trap, and NMI. Maskable interrupts can be

 

 

disabled (masked) by the individual mask bits in the

 

 

interrupt mask registers, and their servicing can be

 

 

disabled by the global interrupt enable bit. Each

 

 

maskable interrupt can be assigned to the PTS for

 

 

processing.

monotonic

The property of successive approximation converters

 

 

which guarantees that increasing input voltages

 

 

produce adjacent codes of increasing value, and that

 

 

decreasing input voltages produce adjacent codes of

 

 

decreasing value. (In other words, a converter is

 

 

monotonic if every code change represents an input

 

 

voltage change in the same direction.) Large differ-

 

 

ential nonlinearity errors can cause the converter to

 

 

exhibit nonmonotonic behavior.

MSB

Most-significant bit of a byte or most-significant byte

 

 

of a word.

n-channel FET

A field-effect transistor with an n-type conducting

 

 

path (channel).

n-type material

Semiconductor material with introduced impurities

 

 

(doping) causing it to have an excess of negatively

 

 

charged carriers.

no missing codes

An A/D converter has no missing codes if, for every

 

 

output code, there is a unique input voltage range

 

 

which produces that code only. Large differential

 

 

nonlinearity errors can cause the converter to miss

 

 

codes.

 

 

Glossary-5

 

 

 

 

 

Page 144
Image 144
Intel 87C196CB, 8XC196NT See interrupt service routine, See differential nonlinearity and nonlinearity, linearity errors