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부품번호 | YMU757B 기능 |
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기능 | MA-1C | ||
제조업체 | YAMAHA CORPORATION | ||
로고 | |||
전체 43 페이지수
YMU757B
MA-1C
Outline
The YMU75B is a high quality melody LSI for cellular phone handsets, supporting the data format for various
applications including ringing and holding melody sounds. The built-in Yamaha's original FM synthesizer can create
various timbres, and its built-in sequencer can produce up to 4 different sounds with 4 different timbres simultaneously
without placing a load to the controller.
The serial port controller interface enables real time reproduction of the melody data via FIFO, without the limitation of
the data capacity.
With a built-in amplifier to drive the dynamic type speaker, it is possible to connect the speaker directly.
This LSI also has an analog-output terminal for the phone jack. In the stand-by mode, the power consumption
can be reduced to 1 µA or less while waiting.
Features
YAMAHA's original FM sound generator function
Built-in sequencer
Capable of producing up to 4 different sounds simultaneously (4 independent timbres available).
Built-in output 400mW speaker amplifier
Built-in circuit for sound quality correcting equalizer
Built-in serial interface
2.688, 8.4, 12.6, 14.4, 19.2, 19.68, 19.8 and 27.82 MHz serial clock inputs support
And support the mode which set to optional frequency from 2.685MHz to 27.853MHz at 55.93kHz intervals
Analog output for ear phone
Power down mode (Typ 1µA or less)
Power supply voltage (Digital and Analog): 3.0V±10 %
20-pin QFN
YAMAHA CORPORATION
YMU757B CATALOG
CATALOG No.:LSI-4MU757B2
2000.4
YMU757B
Block description
1) Serial interface
When the serial interface receives the serial data, it identifies the index data and transmits the control data to each
function block.
2) FIFO
The musical score data are stored temporarily in FIFO which can contain up to 32 musical score data. The musical
score data are processed are processed in the sequencer when they are generated as sounds and those that have been
processed are deleted one after another. When the remaining data amount in FIFO reaches the register setting (IRQ
point) or less, it outputs an interrupt signal to ask for the continuing musical score data to be fed.
3) Sequencer
When the sequencer receives the START command, it starts to read the musical score data which have been stored in
FIFO. The processed musical score data are deleted.
4) Timbre register (Index 10h~2Fh)
The timbre data are stored in this register which can contain up to 8 timbres. Settings for this register must be made
before sound generation. Though it is initialized by hardware resetting, contents of a register aren't cleared, and the
value which had light last time is held as for the following.
• Software reset (CLR bit of Index32h)
• After the inside of the power going down mode and a release.
5) FM synthesizer
The timbres are synthesized and generated according to settings. Four sounds can be generated at the same time.
6) D/A, volume and amplifier
The outputs from the synthesizer are D/A converted and volume processed. After that, they are output from the
speaker or the earphone out terminal.
-4-
4페이지 YMU757B
Block diagram
SCLK
SYNC
SDIN
/IRQ
/RST
Timing Generator
HPVOL
32step
Serial
I/F
Register
FIFO
16b x 32w
FM
Synthesizer
4Sound signals generated
simultaneously
DAC
FMVOL
32step
VREF
+-
VREF
SPVOL
32step
AMP
VREF
SPVSS
EQ1
EQ2
EQ3
SPOUT
SPOUT
Concerning AIN signal inputted into equalizer circuit
As this design presupposes the use of this LSI for the "hands-free", it is possible to process the FM sound and call sound by
analog mixing in the equalizer circuit and output the resulting sound through the speaker.
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7페이지 | |||
구 성 | 총 43 페이지수 | ||
다운로드 | [ YMU757B.PDF 데이터시트 ] |
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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
YMU757B | MA-1C | YAMAHA CORPORATION |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |