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SAMSUNG Proprietary-Contents may change without notice
SGH-N620E Circuit Description
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2-3
MIC.
YMU759, 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, YMU759 is equipped 16 voices with different tones.
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 YMU759 are interpreted at anytime through FIFO,
the length of the data(playing period) is not limited, so the device can flexibly support 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. YMU759 includes a speaker amplifier with high ripple removal rate
whose maximum output is 550mW (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 YMU759 to demonstrate its full capablities, Yamaha purpose 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 traning karaoke, and commercial
channel that combines texts, images and sounds, and others. The hardware sequencer of YMU759AE2 directly interprets
and plays blocks relevant to systhesis (playing music and reproducing ADPCM with FM synthesizer) that are included in
data distributed in SMAF.
8. Memory
Signals in the VP40578 enable two memories. They use only one volt supply voltage, VDD3. This system uses LRS1383.
It is consisted of 32M bits flash and 8M bits SRAM.. It has 16 bit data line, D[0~15] which is connected to VP40578. It
has 22 it address lines, HA[0~21]. FALSH1 and CSRAM signals is chip select.
9. VP40578
VP40578 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[0~23], address lines of ARM core and HD[0~15], data lines of
ARM core are connected to memory, YMU759.
External IRQ(Interrupt ReQuest) signals from each units, such as, PMU need the compatible process.
KBIO[0~7] receive the status from key
It has JTAG control pins(TDI/TDO/TCK) for ARM core and DSP core. It recieves 13MHz clock in CKI pin from
external TCXO. ADC(Analog to Digital Convertor) part receives the status of temperature, battery type and battery voltage.
10. VC-TCXO(13MHz)
This system uses the 13MHz , VC-TCXO. Toyocom. AFC control signal form VP40578 controls frequency from 13MHz
x-tal. It generates the clock frequency. This clock is connected to VP40578, YMU762.