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Circuit Description
2-4
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, YMU769 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 two volt supply voltage, VREG_MSME and
VREG_MSMP 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.It has 22 bit address lines, A[1~22]. ROM_CS and RAM_CS signals is chip select.
2-2-5. Camera
The camera module consists of 1.3 Mega pixel. The Mega camera is a highly integrated CMOS color image
sensor implemented by Hynix CMOS sensor process realizing high sensitivity and wide dynamic range. Total
pixel array size is 1298H x 982V, and 1280H x 960V pixels are active.
2-2-6. IRDA
This system uses IRDA module, HSDL_3208, Agilent's. This has signals, "IRDA_EN"(enable signal),
"RXD0"(Input data) and "TXD0"(output data). These signals are connected to U302(MSN6250). It uses two
power signals. "VREG_MSMP" is used for circuit and "VBATT" is used for LED.
2-2-7. TransFlash Card (External Memory Card)
Memory Module has eight exposed contacts on one side. The host is connected to the module using a
dedicated eight-pin connector.
Measuring just 11mm by 15mm and 1mm thick, Two-thirds the size of a SIM
module, TransFlash is even smaller than many embedded memory devices.
