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Circuit Description
2-4
2-2-3. Audio
YMU765 has a built-in 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 32 FM voices and 32 Wave
Table voices. Furthermore, YMU765 has a built-in hardware sequencer that helps to realize complex play without
heavily loading the host CPU. And this device also has a built-in circuit for controlling vibrators and LEDs
synchronizing with play of music. The consumed electric current can be stopped to the minimum by power down
mode when not operating.
The hardware sequence 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.
2-2-4. Memory
The signals in the MSM6250 enable two memories. They use volt supply voltage, VREG_MSMP, VREG_MSME
from the PM6650. This system uses SEC's memory, KBE00F005M-F411. It is consisted of 1G bits flash NAND
memory and 512M bits SDRAM memory. It has 16 bit data line, D1[0~15] which is connected to MSM6250.
2-2-5. Camera
The camera module consists of VGA pixel of system LSI(Samsung Techwin), 1/5.8" VGA CMOS image sensor with
an embedded image signal processor. Pixel size is 4.0 um and effective resolution is 640(H) x 480(V).
2-2-6. Irda
This system uses IRDA module, HSDL_32085, Agilent's. It uses two power signals, "VREG_MSMP" for circuit and
"VBATT" for LED.
2-2-7. Bluetooth
This system uses Bluetooth module, LBDA245AN0, Murata's. Chip solution is of Broadcom, BCM2004. It uses a
power signal, "VREG_BT". This system uses Blue-Q interface in that module has RF circuit and base band bluetooth
part is in MSM6250.
