— 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
1POWER ON signal
UPD912GF-3BA pin 21
2APO signal
UPD912GF-3BA pin 3
3Reset signal for the DSP
UPD912G-3BA pin 99
4Key scan signal KC0
UPD912GF-3BA pin 31
5Key scan signal KC1
UPD912GF-3BA pin 32
6Key scan signal KC2
UPD912GF-3BA pin 33
CDAC output (R-ch)
UPD6379GR pin 5
DDAC output (L-ch)
UPD6379GR pin 8
EAmp. input (R-ch)
LA4598 pin 6
FAmp. input (L-ch)
LA4598 pin 10
7LED drive signal
BA612 pin 13
8LED drive signal
BA612 pin 12
9LED drive signal
BA612 pin 11
0Word clock LRCK
UPD912GF-3BA pin 13
AData signal SO
UPD912GF-3BA pin 12
BBit clock BCK
UPD912GF-3BA pin 11
Tone: Pan Flute (39)
Key: A4
Touch response: Off
Volume: Maximum