— 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
µ
s
0.1 s
CH1:
CH2: 5 V
5 V
CH3: 5 V
50
µ
s
CH1
CH2
CH3
CH1:
CH2: 5 V
5 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
