Sound Generator Operations; To Output Basic Cycle Signal Sgo - NEC mPD780852 Series Preliminary User's Manual

17.4 Sound Generator Operations

17.4.1 To output basic cycle signal SGO

The basic cycle signal is output from the SGO pin if the bit 7 (TCE) of the sound generator control register (SGCR)
is set to "1".
The basic cycle signal of the frequency set by SGCL0 to SGCL2 and SGBR0 to SGBR3 is output.
The amplitude of the basic cycle signal can be changed by changing the set value of the sound generator amplitude
register (SGAM).
Figure 17-6. Sound Generator Output Operation Timing
Timer
Comparator 1 coincidence
SGO
CHAPTER 17 SOUND GENERATOR
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