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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
5 Key scan signal KC0
UPD912GF-3BA pin 31
6 Key scan signal KC1
UPD912GF-3BA pin 32
7 Key scan signal KC2
UPD912GF-3BA pin 33
4 Synchronizing pulse
UPD912GF-3BA pin 6
A Word clock LRCK
UPD912GF-3BA pin 13
B Data signal SO
UPD912GF-3BA pin 12
C Bit clock BCK
UPD912GF-3BA pin 11
D Word clock LRCK
UPD6379GR pin 1
E Data signal SI
UPD6379GR pin 2
F Bit clock CLK
UPD6379GR pin 3
8 LED drive signal PB0
HG51B227FB pin 80
9 LED drive signal PB1
HG51B227B pin 1
0 LED drive signal PB2
HG51B227FB pin 2
G DAC output (R-ch)
UPD6379GR pin 5
H DAC output (L-ch)
UPD6379GR pin 8
I Amp. input (R-ch)
LA4598 pin 6
J Amp. 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