ES5120
3 3/4 DIGIT A/D CONVERTER
10.3 Logic Probe Theory of Operation :
This mode is selected when the LOGIC input is high. Two
dual purpose pins, which normally control the decimal points,
are used as logic inputs. Connecting either input to a logic
high level will turn on the corresponding LCD annunciator,
Also when the "low" annunciator is on the buzzer will be on.
As with the Frequency Counter input, external level
shifters/buffers are recommended for the logic probe inputs.
(Fig.7)