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— 9 —
1
2
3
CH1
CH2
CH3
4
5
6
A 5 ms
CH1
CH2
CH3
CH1: 5 V CH2: 5 V CH3: 5 V
–––
7
8
9
A 1 ms
CH1
CH2
CH1: 0.2 V CH2: 0.2 V
~~
C
D
E
F
A 1 ms
CH1
CH2
CH1: 0.2 V CH2: 0.2 V
~~
CH1
CH2
CH3
0
A
B
–––
CH1: 5 V CH2: 5 V CH3: 5 V
A 2 µs
0.1 s
CH1: CH2:
5 V5 V CH3: 5 V
50 µs
CH1
CH2
CH3
CH1: CH2:
5 V5 V CH3: 5 V
MAJOR WAVEFORMS
1 POWER ON signal
UPD912GF-3BA pin 21
2 APO signal
UPD912GF-3BA pin 3
3 Reset signal for the DSP
UPD912G-3BA pin 99
4 Key scan signal KC0
UPD912GF-3BA pin 31
5 Key scan signal KC1
UPD912GF-3BA pin 32
6 Key scan signal KC2
UPD912GF-3BA pin 33
C DAC output (R-ch)
UPD6379GR pin 5
D DAC output (L-ch)
UPD6379GR pin 8
E Amp. input (R-ch)
LA4598 pin 6
F Amp. input (L-ch)
LA4598 pin 10
7 LED drive signal
BA612 pin 13
8 LED drive signal
BA612 pin 12
9 LED drive signal
BA612 pin 11
0 Word clock LRCK
UPD912GF-3BA pin 13
A Data signal SO
UPD912GF-3BA pin 12
B Bit clock BCK
UPD912GF-3BA pin 11
Tone: Pan Flute (39)
Key: A4
Touch response: Off
Volume: Maximum