YMU759B
MA-2
Mobile Audio 2
YAMAHA CORPORATION
YMU759 CATALOG
CATALOG No.:LSI-4MU759B2
2001.5
Outline
YMU759B is a synthesis LSI for portable telephone that is capable of playing high quality music by utilizing
FM Synthesizer and ADPCM decorder that are included in this device. As a synthesis, YMU759B is equipped
with Yamaha's original FM synthesizer, with which the device is capable of simultaneously generating up to
16 voices with different tones. Since the device is capable of generating ADPCM data simultaneously
synchronous with the play of the FM synthesizer, various sampled voices can be used as sound effects.
Since the play data of YMU759B are interpreted at anytime through FIFO, the length of the data (playing period)
is not limited, so the device can flexibly support applications such as incoming call melody distribution service.
The hardware sequencer built in this device allows playing of complex music without giving excessive load to
the CPU of the portable telephones. Moreover, the registers of the FM synthesizer can be operated directly for
real time sound generation, allowing, for example, utilization of various sound effects when using the game
software installed in the portable telephone.
YMU759B includes a speaker amplifier with low ripple whose maximum output is 550 mW
(SPVDD=3.6V). The device is also equipped with conventional functions including a vibrator and a circuit for
controlling LEDs synchronous with music.
For the headphone, it is provided with a stereophonic analog output terminal.
For the purpose of enabling YMU759B to demonstrate its full capabilities, Yamaha proposes to use "SMAF:
Synthetic music Mobile Application Format" as a data distribution format that is compatible with multimedia.
Since the SMAF takes a structure that sets importance on the synchronization between sound and images,
various contents can be written into it including incoming call melody with words that can be used for training
karaoke, and commercial channel that combines texts, images and sounds, and others. The hardware sequencer of
YMU759B directly interprets and plays blocks relevant to systhesis (playing music and reproducing ADPCM with
FM synthesizer) that are included in the data distributed in SMAF.
Features
FM synthesizer functions
Tones
FM synthesizer is capable of creating countless tones theoretically.
When synthesizing tones, it is necessary to designate the number of operators to be used for the synthesis.
Increasing the number of operators allows synthesis of tones that are more intricate and closer to those
generated by natural musical instruments.
YMU759B supports synthesis of tones of two types including 2-operator tones and 4-operator tones.
Because operator's wave shape can be chosen from eight kinds, the quality of sound improves more
remarkably than 2 operator sound of the MA-1 series. (A MA-1 series can choose operator wave shape from
two kinds.)
YMU759B
-2-
Number of voices simultaneously generated
YMU759B is equipped with 32 operators.
The number of voices simultaneously generated varies depending on how many 2-operator tones and
4-operator tones are used.
When only 2-operator tones are used: up to 16 voices can be generated simultaneously.
When only 4-operator tones are used: up to 8 voices can be generated simultaneously.
Compatible with stereophonic sound generation.
Volume control
Channel volume, master volume, expression, and pan pot control in individual channels
Sequencer is built in.
Can interpret Mobile Multimedia Format directly.
Equipped with four systems of 96 FIFOs for sequence data
Supports direct access that directly controls FM synthesizer.
Supports key control with half an octave higher and lower.
ADPCM reproduction function
Equipped with ADPCM decoder with 4 bits, 1 channel
Supports two kinds of sampling frequency, 4 kHz and 8 kHz.
Sequencer is built in.
Equipped with 348 byte FIFO for ADPCM data and 32 byte FIFO for sequence data
Supports direct access that directly controls ADPCM section.
Speaker amplifier and equalizer circuit
Output of speaker amplifier: 550 mW when SPVDD=3.6 V, or 400 mW when SPVDD=3.0 V
Balanced input speaker amplifier provides low ripple
Built-in equalizer circuit corrects the difference of frequency response among the speakers and forms of
bodies.
Interface
4 wire serial interface or 12 wire parallel interface can be selected.
Others
PLL is built-in to support master clock input in 2 MHz to 20 MHz range.
Provided with a circuit for controlling on/off of LEDs and vibrator. These can be operated synchronous with
the play data.
Provided with a stereophonic analog output terminal for headphone
16 bit stereophonic D/A converter is built in.
Supports power down mode. (Typical current: 1 A or less)
Power supply voltage
The power supply includes two power supply sub-systems, analog power supply devoted to speaker amplifier
and power supply for other sections.
The power supply for the speaker amplifier (SPVDD) supplies voltages in the range 2.7 V
~
4.5 V (Typ 3.6 V),
and other power supplies (VDD) voltages in the range 2.7 V
~
3.3 V (Typ 3.0 V).
32-pin plastic QFN. (YMU759B-Q)
YMU759B
-4-
Terminal functions
No. Name
I/O
Function
1 CLKI
Ish
Clock input (2
~
20MHz)
2
EXT1
O
External device control terminal 1 (*1)
3 /IRQ
O
Interruption output
4 /RST
Ish
Hardware reset input
5 IFSEL I
CPU I/F selection L: Serial I/F, H: Parallel I/F
6 PLLC
A
Connection of capacitor for built in PLL
Connect the 3.3k
resistance and the 1000pF capacitor between this terminal
and VSS (*) in series.
(*)Directly connect VSS used here and VSS of 8
th
pin.
7 VDD -
Digital power supply (Typically +3.0V)
Connect 0.1
F and 4.7
F capacitors between this terminal and VSS
8 VSS -
Ground
9 VREF
A
Analog reference voltage.
Connect 0.1
F capacitor between this terminal and VSS
10
HPOUT-L / MONO
A
Headphone L channel output: can be switched to mono through register setting
11 HPOUT-R A
Headphone R channel output
12 EQ1 A
Equalizer terminal 1
13 EQ2 A
Equalizer terminal 2
14 EQ3 A
Equalizer terminal 3
15
SPVDD
-
Analog power supply (Typically +3.6 V)
Connect 0.1
F and 4.7
F capacitors between this terminal and SPVSS
16 SPVSS -
Analog ground for speaker amplifier
17 SPOUT1 A
Speaker terminal 1
18 SPOUT2 A
Speaker terminal 2
19
EXT2
O
External device control terminal 2 (*1)
20
D7
I/O
Parallel I/F data bus 7 (*1)
21
D6
I/O
Parallel I/F data bus 6 (*1)
22
D5
I/O
Parallel I/F data bus 5 (*1)
23 D4
I/O
Parallel I/F data bus 4 (To be open when IFSEL=L)
24 D3
I/O
Parallel I/F data bus 3 (To be open when IFSEL=L)
25 D2
I/O
Parallel I/F data bus 2 (To be open when IFSEL=L)
26 D1
I/O
Parallel I/F data bus 1 (To be open when IFSEL=L)
27 D0
I/O Parallel I/F data bus 0 (To be open when IFSEL=L)
28 /WR
Ish
Parallel I/F write pulse (To be open when IFSEL=L)
29 SDIN
(/CS)
Ish
IFSEL= L Serial I/F data input
IFSEL= H Parallel I/F chip select input
30 SYNC
(A0)
Ish
IFSEL= L Serial I/F data decision signal
IFSEL= H Parallel I/F address signal
31 SCLK
(/RD)
Ish
IFSEL= L Serial I/F bit clock input
IFSEL= H Parallel I/F read pulse
32 SDOUT
OD
Serial I/F data output (Pull up resistance is necessary for the outside)
Comment: Ish= Schmitt input, OD= open drain terminal, A= Analog terminal
(*1) The function changes by setup of the register.
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