— 11 —
MAJOR WAVEFORMS1POWER ON signal
UPD912GF-3BA pin 21
2APO signal
UPD912GF-3BA pin 3
3Reset signal for the DSP
UPD912G-3BA pin 99
5Key scan signal KC0
UPD912GF-3BA pin 31
6Key scan signal KC1
UPD912GF-3BA pin 32
7Key scan signal KC2
UPD912GF-3BA pin 33
4Synchronizing pulse
UPD912GF-3BA pin 6
AWord clock LRCK
UPD912GF-3BA pin 13
BData signal SO
UPD912GF-3BA pin 12
CBit clock BCK
UPD912GF-3BA pin 11
DWord clock LRCK
UPD6379GR pin 1
EData signal SI
UPD6379GR pin 2
FBit clock CLK
UPD6379GR pin 3
8LED drive signal PB0
HG51B227FB pin 80
9LED drive signal PB1
HG51B227B pin 1
0LED drive signal PB2
HG51B227FB pin 2
GDAC output (R-ch)
UPD6379GR pin 5
HDAC output (L-ch)
UPD6379GR pin 8
IAmp. input (R-ch)
LA4598 pin 6
JAmp. input (L-ch)
LA4598 pin 10
Note: On
Tone : Whistle (70)
Key : A4
Touch response : Off
Reverb : Off
Volume : Maximum
1
2
3
0.1 s
CH1
CH2
CH1: CH2: 5 V5 V
4
20 µs
CH1
5 VCH1:
5
6
7
CH1
CH2
CH3
50 µs
5 VCH1: 5 VCH2: 5 VCH3:
8
9
0
CH1
CH2
CH3
5 VCH1: 5 VCH2: 5 VCH3:
5 ms
A
B
C
CH1
CH2
CH3
2 µs
5 VCH1: 5 VCH2: 5 VCH3:
D
E
F
CH1
CH2
CH3
2 µs
5 VCH1: 5 VCH2: 5 VCH3:
G
H
CH1: . 1 V
~
CH1
CH2
CH2: . 1 V
~
1 ms
I
J
CH1
CH2
CH1: . 1 V
~CH2: . 1 V
~
1 ms