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The meaning of the bits for the sound source register is described below based on the classification in Table 4.9. For the symbols added after the register name, (R) indicates read-only, (W) indicates write-only, and (R / W) indicates read-write.
When reading data from the write-only register (bit), the value is "0B". Be sure to write "0B" when writing data to the read-only register (bit).

■ Loop control register

KYONEX (W); KeY ON EXecution
Writing “1B” will execute KEY_ON, OFF of all slots.

KYONB (R / W); KeY ON Bit
Register KEY_ON, OFF. (If you want to make KEY_ON at the same time, set "KYONB" of the slot you want to turn on to "1B".)

Table 4.10 KYONB function
Bit Function
0 Register KEY_OFF
1 Register KEY_ON

"KYONEX" and "KYONB" exist in each slot. The sequence of KEY_ON and KEY_OFF is as shown in Figure 4.8.
"KYONEX" does not need to write "0B" after writing "1B". In any slot, "1B" will work for all slots, so there is no need to set it to "1B" in a specific slot.

Figure 4.8 KEY_ON and KEY_OFF functions

SBCTL[1:0](R/W); Source Bit ConTroL
Specifies the bit inversion operation for sound input data.
”The inversion function of the bit written with“ 1B ”is enabled.

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