YMU762

MA-3

Mobile Audio 3

YAMAHA CORPORATION

YMU762 CATALOG

CATALOG No.:LSI-4MU762A3

2002.9

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

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.

YMU762

Functions of pins

No.

Pin name

I/O

Power supply

Function

CLKI

Ish

IOVDD

Clock input ( 2 MHz to 20 MHz)

LED

IOVDD

External LED control (Drive Capability = 4 mA)

/IRQ

IOVDD

Interrupt output (Drive Capability = 1 mA)

/RST

Ish

IOVDD

Hardware reset input

5 N.C

No Connection (during regular operations)

6 PLLC A VDD

Connection of capacitor for built-in PLL
Connect a series connection of 1000 pF capacitor and 3.3 k resistor
between this pin and VSS(*).
(*)Directly connect VSS used here and VSS of 8

pin.

7 VDD

Power supply (Typ +3.0V)
Connect 0.1 �F and 4.7 �F capacitors between this pin and VSS.

8 VSS

Ground

9 VREF A VDD

Analog reference voltage
Connect 0.1 �F capacitor between this pin and VSS.

HPOUT-L /

MONO

VDD

Headphone output Lch (Can be used as MONO output)

HPOUT-R

VDD

Headphone output Rch

12 EQ1 A VDD Equalizer

EQ2

VDD

Equalizer pin 2

EQ3

VDD

Equalizer pin 3

15 SPVDD

Speaker amplifier analog power supply (Typ +3.6V)
Connect 0.1 �F and 4.7 �F capacitors between this pin and SPVSS.

16 SPVSS

Speaker amplifier analog ground

17 SPOUT1

SPVDD

Speaker connection pin 1

SPOUT2

SPVDD

Speaker connection pin 2

MTR

IOVDD

External motor control pin (Drive Capability = 4 mA)

I/O

IOVDD

CPU I/F data bus 7 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 6 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 5 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 4 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 3 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 2 (Drive Capability = 1 mA)

26 D1

I/O

IOVDD

CPU I/F data bus 1 (Drive Capability = 1 mA)

I/O

IOVDD

CPU I/F data bus 0 (Drive Capability = 1 mA)

/WR

IOVDD

CPU I/F write enable

/CS

IOVDD

CPU I/F chip select

IOVDD

CPU I/F address signal

/RD

IOVDD

CPU I/F read enable

32 IOVDD

Pin power supply (Typ +3.0V)
Be sure to apply potential equivalent to 7

pin (directly connect on the

board).

A : Analog pin Ish : Schmitt input

YMU762

Block diagram

HPOUT-L

/MONO

HPOUT-R

1
6-

bit

DAC

CLKI

VDD

VSS

PLLC

e
r

Down

ont

r
o
l

i
ming G

e
ner

a
tor

PLL

LED

contr

o
l

Vibr

ator

ont

r
o
l

TIM

/WR

D0 -

SPVDD

SPVSS

VRE

Vol

P
OUT

Analog power
Supply dedicated
To speaker amp

ono

8k-

byt

Voice

Vol

IOVDD

g
i
st

e
r

Sequencer

5
1
2byte

I
n
s
t
ant

a
ne

ous

64byte

Select

u
ffe

l
R

n
e
ou

s
w

r
ite

a
th

l
a
y
e
d wr

i
t
e

t
h

s
t
an

n
e
o
u
s rea

t
h

f
t
wa

r
e

+
W

a
v
etable

ynthes

i
z
e
r

(
F

s
=

48kHz)

/ADPCM

l
ay

a
ck

l
L

YMU762

Outline of blocks

This section outlines functions of blocks contained in this device and flow of signals.

rfa
c
e

FIFO

Sequencer

SE
L

FM +WaveTable

Synthesizer

Voice ROM

SRAM

Buffer

DAC

amp.

Speaker

amp.

Headphone

Output

Instantaneous write path

Delayed write path

Instantaneous read path

FIFO

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.

Электронный компонент: YMU762C-QZ