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MIDI SOUND circuit description
MIDI/SPK
MCLK
LCD_RESET
A(1)
C203
_RD
1000p
MIDI_CS
_WR
MELODY_INT
D(0:7)
D(0)
D(1)
D(2)
D(3)
D(4)
D(5)
D(6)
D(7)
V_IO
C213
C214
0.1u
1000p
The YMU762 has features as described below.
• Simultaneous generation of up to 40 tones: FM+Wavefrm table stereophonic hybrid synthesizer
• Polyphonic synthesizer specification
• Has built-in default tones for FM and Waveform table synthesizers in the ROM, and the tone can be
downloaded ot RAM.
• Fundamedtal waveforms for FM and algorithm are improved, and tome paramedters are added.
• Software replay with ADPCM/PCM (shared use of Waveform table section)
• Software interrupt mechanism for external synchronization
• Equipped with 8 bit parallel I/F for control from CPU
• Ezuipped with speaker amplifier and equalizer circuit
• Has built-in PLL to support inputting of master clock up to 20 NHz.
• Contains a 16-bit stereophonic D/A converter.
• Equipped with a stereophonic output terminal for headphone
• Supports power down mode.
• Digital power supply: 2.7V to 3.3V (Typ 3.0V)
• Analog power supply: 2.7V to 4.5V (Typ 3.6V)
• 32-pin QFN plastic package
U201
YMU762C-QZ
1
11
CLK1
HPOUT_R
4
10
_RST
HPOUT_L
30
C201
A0
31
12
_RD
EQ1
29
22n
_CS
5
13
NC
EQ2
C204
28
_WR
3
_IRQ
27
14
D0
EQ3
26
2
D1
LED
25
19
D2
MTR
24
D3
23
D4
22
17
D5
SPOUT1
21
D6
20
D7
3.3K
6
18
PLLC
SPOUT2
VBAT
R208
9
VREF
32
15
SPVDD
IOVDD
C211
7
VDD
0.1u
8
16
VSS
SPVSS
C215
0.1u
Figure 21. MIDI sound Circuit
- 41 -
3. H/W Circuit Description
C200
0.1u
V_IO
U200 DG3000DB
B1
C202
R200
R201
B2
39K
1u
33K
B3
47p
R204
120K
VIBRATOR
CN200
1
C207
2
27p
C209
C210
47p
47p
C212
4.7u
VOICEMAIL_EN
A1
IN
NO
A2
V+
COM
RCV_P
A3
GND
NC
RCV_P_SW
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