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Circuit Description
2-4
2-4. IF connetor
It is 20-pin connector. They are designed to use VBATT, UART1_TX, UART1_RX, EARMIC_P/N, EAR_R/L,
EAR_SW, JACK_INT, ADC_BOOTSW, JIG_ON, USB_D+/-. They connected to power supply IC, microprocessor
and signal processor IC.
3. Audio
EAR1O_P and EAR1O_N from UCP100 are connected to the main speaker. AUXO_P and AUXO_N are
connected to the Digital AMP. MIC1_P and MIC1_N are connected to the main MIC. And MIC2_P and MIC2_N
are connected to the Earphone.
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.
4. Memory (UME300)
The signals in the MSM6250 enable two memories. They use VREG_MSME_1.8V and VREG_MSMP_2.6V from
the PM6650. This system uses SEC's memory, KBE00S005M-D411. It is consisted of 2G 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]. SDRAM_CS and NANDFLASH_CS signals is chip select.
5. Camera
The camera module consists of 1.3 Mega pixel and VGA pixel. The 1.3 Mega camera is a highly integrated
CMOS color image sensor implemented by Micron COMS sensor process realizing high sensitivity and wide
dynamic range.
Total active pixel is 1280H x 1024V. The VGA camera is a highly integrated CMOS color image
sensor implemented by Micron COMS sensor process realizing high sensitivity and wide dynamic range. Total
active pixel is 656H x 488V.