Yamaha R-V702 R-V502 User Manual download pdf (Page 8)

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Circuit Description

2-4

YMU765MA5 is a 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, YMU765MA5 is equipped 32 FM voices and 32

Wave Table voices. Since the device is capable of simultaneously generating up to synchronous with the play of the FM

synthesizer, various sampled voices can be used as sound effects.

Since the play data of YMU765MA5 are interpreted at anytime through FIFO, the length of the data(playing period) is

not limited, so the device can flexiblysupport application such as incoming call melody music distribution service.

The hardware sequencer built in this device allows playing of the 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.

YMU765MA5 includes a speaker amplifier with high ripple removal rate whose maximum output is 580mW

(SPVDD=3.6V). The device is also equipped with conventional function including a vibartor and a circuit for controlling

LEDs synchornous with music.

For the headphone, it is provided with a stereophonic output terminal.

For the purpose of enabling YMU765MA5 to demonstarte its full capablities, Yamaha purpose to use "SMAF:Synthetic

music Mobile Application Format" as a data distribution format that is compatible wiht 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 traning karaoke, and commercial channel that combines

texts, images and sounds, and others. The hardware sequencer of YMU765MA5 directly interprets and plays blocks

relevant to systhesis (playing music and reproducing ADPCM with FM synthesizer) that are included in data distributed in

SMAF.

5. Memory

signals in the OM6357_7 enable two memories. They use only one volt supply voltage, VDD3 in the PCF50601. This

system uses Samsung's memory, KBB06B400M-F402. It is consisted of 128M bits flash NOR memory and 256M bits

flash NAND memory and 64M bits SCRAM. It has 16 bit data line, HD[0~15] which is connected to OM6357_7 and

MV317S. It has 26 bit address lines, HA[1~26]. CS_NAND and NCSRAM signals is chip select. Wrting process,

HWR_N is low and it enables writing process to flash memory and SRAM. During reading process, HRD_N is low and

it enables reading process to flash memory and SRAM. Each chip select signals in the OM6357_7 select memory among

2 flash memory and SCRAM. Reading or writing procedure is processed after HWR_N or HRD_N is enabled. Memories

use reset, which is VDD3 delay from PCF50601. HA[25] signal enables lower byte of SRAM and HA[26] signal enables

higher byte of SRAM.

6. OM6357_7

OM6357_7 is consisted of ARM core and DSP core. It has

8x1Kword on-chip program/data RAM, 55 Kwords

on-chip program ROM

in the DSP. It has 4K*32bits ROM and 2K*32bits RAM in the ARM core. DSP is consisted

of KBS, JTAG, EMI and UART. ARM core is consisted of EMI, PIC(Programmable Interrupt Controller),

reset/power/clock unit, DMA controller, TIC(Test Interface Controller), eripheral bridge, PPI, SSI(Synchronous Serial

Interface), ACC(Asynchronous communications controllers), timer, ADC, RTC(Real-Time Clock) and keyboard interface.

KBIO(0:7), address lines of DSP core and HD[0~15]. HA[1~26], address lines of ARM core and HD[0~15], data lines of

ARM core are connected to memory, YMU765. MV317S(Camera DSP Chip) controls the communication between ARM

core and DSP core.

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Yamaha R-V702 R-V502 User Manual Page 8

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