Intel 87C196CA, Supplement To User’S Manual

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8XC196L
X SUPPLEMENT
Glossary-4
external address A 21-bit address is presented on the microcontroller’s
pins. The address decoded by an external device
depends on how many of these address pins the
external system uses. See also internal address.
f Lowercase “f” represents the frequency of the internal
clock.
far constants Constants that can be accessed only with extended
instructions. See also near constants.
far data Data that can be accessed only with extended instruc-
tions. See also near data.
feedthrough The attenuation from an input voltage on the selected
channel to the A/D output after the sample window
closes. The ability of the A/D converter to reject an
input on its selected channel after the sample window
closes.
FET Field-effect transistor.
full-scale error The difference between the ideal and actual input
voltage corresponding to the final (full-scale) code
transition of an A/D converter.
hold latency The time it takes the microcontroller to assert HLDA#
after an external device asserts HOLD#.
ideal characteristic The characteristic of an ideal A/D converter. An ideal
characteristic is unique: its first code transition occurs
when the input voltage is 0.5 LSB, its full-scale (final)
code transition occurs when the input voltage is 1.5
LSB less than the full-scale reference, and its code
widths are all exactly 1.0 LSB. These properties result
in a conversion without zero-offset, full-scale, or
linearity errors. Quantizing error is the only error
seen in an ideal A/D converter.
input leakage Current leakage from an input pin to power or ground.
input series resistance The effective series resistance from an analog input
pin to the sample capacitor of an A/D converter.
integer Any member of the set consisting of the positive and
negative whole numbers and zero.
INTEGER A 16-bit, signed variable with values from –2
15
t2
15
–1.