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PDF YMU762 Data sheet ( Hoja de datos )
| Número de pieza | YMU762 | |
| Descripción | Mobile Audio 3 | |
| Fabricantes | Yamaha | |
| Logotipo |  |
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YMU762
MA-3
Mobile Audio 3
Outline
MA-3 is a synthesizer LSI for mobile phones that realize advanced game sounds.
This LSI has a built-in speaker amplifier, and thus, is an ideal device for outputting sounds that are used by mobile
phones in addition to game sounds and ringing melodies that are replayed by a synthesizer.
The synthesizer section adopts “stereophonic hybrid synthesizer system” that are given advantages of both FM
synthesizers and Wave Table synthesizers to allow simultaneous generation of up to thirty two FM voices and eight
Wave Table voices.
Since FM synthesizer is able to present countless voices by specifying parameters with only several tens of bytes,
memory capacity and communication band can be saved, and thus, the device exhibits the features in operating
environment of mobile phones such as allowing distribution of arbitrary melodies with voices.
On the other hand, Wave Table synthesizer can pronounce the voice built in ROM and arbitrary ADPCM/PCM voices
from sequencer by the download of the melody with voices etc..
MA-3 has a built-in hardware sequencer that helps to realize complex play without heavily loading the host CPU.
The device also has a built-in circuit for controlling vibrators and LEDs synchronizing with play of music.
Features
MA-3 has features as described below.
■ Simultaneous generation of up to 40 tones: FM + Wave Table stereophonic hybrid synthesizer.
■ Polyphonic synthesizer specification.
■ Has built-in default voices for FM and Wave Table synthesizers in the ROM, and the voices can be downloaded to
RAM.
■ Fundamental waveforms for FM and algorithm are improved compared with YMU759 (MA-2), and voice
parameters of detune etc. are added.
■ Stream replay with ADPCM / PCM (shared use of Wave Table section).
■ Software interrupt mechanism for external synchronization.
■ Equipped with 8 bit parallel I/F for control from CPU.
■ Equipped with speaker amplifier and equalizer circuit.
■ Equipped with vibration control circuit, and LED lighting control circuit.
■ Has built-in PLL to support inputting of master clock up to 20 MHz.
■ 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
The contents of this booklet are target specifications and they are subject to change without
a prior notice. Please check the finalized specifications before actually using this LSI.
YAMAHA CORPORATION
YMU762 CATALOG
CATALOG No.:LSI-4MU762A3
2002.9
1 page  
YMU762
Outline of blocks
This section outlines functions of blocks contained in this device and flow of signals.
Register
FIFO
Instantaneous write path
FIFO
Sequencer
Delayed write path
Buffer
Instantaneous read path
Voice ROM
Headphone
Output
FM +WaveTable
Synthesizer
DAC
EQ
amp.
SRAM
Speaker
amp.
CPU interface
CPU interface is an 8-bit parallel type.
- ”Instantaneous write path” that enables Write command immediately (equipped with 64byte FIFO),
- ”Delayed write path” that enables Write command after elapse of specified time, and
- Instantaneous read path
are available.
Hardware sequencer and FIFO
The sequencer is a block that controls time and register access.
The structure of sequence data includes “time information data + MA-3 register control data”, for which 512 byte FIFO
is provided. The sequence data is written into delayed write path.
FM+Wave Table synthesizer
This device contains a Polyphonic synthesizer that adopts FM +Wave Table stereophonic hybrid system that generates
up to 40 tones.
The FM synthesizer has two operation modes; “16-Voice 4 operation mode” and “32-Voice 2 operation mode” which
can be changed to each other freely (except during tone generation).
Since waveform for FM operation can be set arbitrarily, the device is able to create voices that are more complex than
by conventional devices.
Wave Table synthesizers is able to generate eight voices simultaneously, and supports 8 bit PCM and 4 bit ADPCM
data format. The sampling frequency is 48 kHz. Stream replaying is also available, realizing interchangeability with
ADPCM replay capability of MA-2.
Voice ROM and SRAM
This device stores voice parameters (GM 128 voices + DRUM 40 voices) for FM and waveform data for Wave Table in
the ROM. SRAM is used when downloading arbitrary FM voice parameter and waveform data for Wave Table. It is
also used as waveform data buffer at stream replay with PCM/ADPCM.
DAC
Converts digital signal from a synthesizer into analog signal. The data length is 16 bit.
IRQ and TIMER
This device supports FIFO, two hardware TIMERs, and interrupt output with software interrupt.
5
5 Page 
YMU762
Analog characteristics
Conditions of TOP=25°C, VDD, IOVDD=3.0V and SPVDD=3.6V apply to all items.
SP amplifier
Item
Gain setting (fixed)
Min. load resistance (RL)
Max. output voltage amplitude (RL=8Ω)
Max. output power (RL=8Ω, THD+N≤1.0%)
THD + N (RL=8Ω, f=1 kHz, output = 400mW)
Noise at no signal (A-filter: weighting filter)
PSRR (f=1 kHz)
Amplitude center potential (VSEL2, VSEL1 =0, 0)
(VSEL2, VSEL1 =0, 1)
(VSEL2, VSEL1 =1, 0)
Differential Output Voltage
Min. Typical Max.
±2
8
6.0
580
0.025
-90
90
0.6×VDD
0.5×VDD
0.67×VDD
10
50
Unit
times
Ω
Vp-p
mW
%
dBV
dB
V
V
V
mV
EQ amplifier
Item
Gain settable range
Max. output voltage amplitude
THD + N (f=1 kHz)
Noise at no signal (A-filter)
Input impedance
Feedback resistance between EQ2 and EQ3
Min. Typical Max.
30
2.7
0.05
-90
10
20
Unit
dB
Vp-p
%
dBV
MΩ
kΩ
SP Volume
Volume setting range
Volume step width
THD + N (f=1 kHz)
Item
Min. Typical Max.
-30 0
1
0.05
Unit
dB
dB
%
EQ Volume
Item
Volume setting range
Volume step width
Noise at no signal (A-filter)
Max. output current
Max. output voltage amplitude
Output impedance
Min. Typical Max.
-30 0
1
-90
120
1.5
300 600
Unit
dB
dB
dBV
µA
Vp-p
Ω
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet YMU762.PDF ] | |
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