SN66090 controller equivalent, 4-channel speech controller.
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* Single power supply 2.4V
– 5.1V Built in a tiny controller 90 se.
including section combination, trigger modes, output status, high performance melody, multiple voices, and other logic f.
Bit0 of input port 1 Bit1 of input port 1 Bit2 of input port 1 Bit3 of input port 1
I/O Bit0 of I/O port 2 I/O Bit1 of I/O port 2 I/O Bit2 of I/O port 2 I/O Bit3 of I/O port 2 I/O Bit0 of I/O port 3 I/O Bit1 of I/O port 3 I/O Bit2 of I/O port 3 I/O .
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