Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-73
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Melody Generator)
4.11 Melody Generator
Outline of melody
generator
The S1C62N82 Series has built-in melody generator. Out-
puts related to the melody function are generated from MO
terminal or R12 terminal. The following 3 types of melody
playing may be selected through the mask option:
(1)Piezo buzzer single terminal driving through the MO
terminal
The R12 output is set to DC output through the mask
option. Melody is output from the MO terminal alone.
This setting increases the number of externally fitted
parts to play the melody but since the R12 output may be
used as a common high-power current output, it is useful
when high-power current driving common output is
required.
(2)Piezo buzzer direct driving through the MO and R12
outputs
The R12 output is set to piezo direct driving through the
mask option. Reversed signal of the MO terminal output
signal is output from the R12 terminal. This allows the
piezo buzzer direct driving to materialize. This setting
makes it possible to keep the number of externally fitted
parts to the minimum.
(3)Envelope driving
The R12 output is set to the envelope function through
the mask option. Sound pressure of the playing is at-
tenuated with time, making it possible to implement a
fully expressive playing.
Moreover, normal HIGH output and normal LOW output
may be selected for each of the above-mentioned melody
output.
Refer to Chapter 5, "BASIC EXTERNAL WIRING DIAGRAM"
for the respective external wirings.