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LG Electronics Inc.
VX11000
2.3.4 Memory Part
MCP contents 4Gbits OneNAND FLASH memory and 2Gbits DDR-SDRAM. In the OneNAND Flash Memory
part of MCP are programs used for terminal operation. The programs can be changed through downloading after the
assembling of terminals. On the DDR-SDRAM data generated during the terminal operation are stored temporarily.
2.3.5 Power Supply Part
When the battery voltage (+4.0V) is fed and the PWR key of keypad is pressed, U6002(PMIC) is activated by the
PWR_ON_SW signal, and The PWRON signal is held high, Buck and LDO1,2,3 are turned on; when LDO1 reaches
87% of its final value a 60ms reset timer is started at after which RESET\ is asserted high. Now the BB Processor is
initialized and will assert PWRHOLD high. PWRHOLD maintains the power on.
The Buck1,2,3/LDO1,2,3 are generating the +1.25V_MSMC1, +1.2_MXMC2, +1.8V_MSME,+2.6V_MSMA,
+2.6V_MSMP and +2 .8V_LCD respectively.
The Rx part +2.1V_RX0, +2.1V_RX1 and Tx Part +2.1V_TX is operated by the I2C control signal from
MSM7500A.
The TCXO part TCXO_EN is operated by the control signal TCXO_EN from MSM7500A.
2.3.6 Logic Part
The logic part consists of internal CPU of MSM, RAM, MCP. The MSM7500A receives TCXO (=19.2MHz) from
the U1003 and controls the phone in CDMA modes. The major components are as follows:
CPU
The ARM926J-S microprocessor includes a 3 stage pipelined RISC architecture, both 32-bit ARM and 16-bit
THUMB instruction sets, a 32-bit address bus, and a 32-bit internal data bus. It has a high performance and low
power consumption.
MCP
OneNAND Flash is used to store the terminal’s program. Using the down-loading program, the program can be
changed even after the terminal is fully assembled.
DDR-SDRAM is used to store the internal flag information, call processing data, and timer data.
External KEYPAD
For external key recognition, key matrix is setup using KEY_SENSE[1][2], KEY_DRIVE[7][8] signal from
MSM7500A. 3 LEDs and backlight circuitry are included in the external keypad for easy operation in the dark.
KEYPAD
For key recognition, key matrix is setup using key encoder IC . 4 LEDs and backlight circuitry are included in the
keypad for easy operation in the dark.
TOUCH WINDOW
For key recognition, the Touch Controller, TSC2007 MSM7500A by using TOUCH_Y-, TOUCH_Y+,
TOUCH_X-,TOUCH_X+. Touch window also supports vibe-touch function when pressing is recognized.
LCD Controller(RGB Converter) and LCD MODULE
LCD Controller S1D13775 will display the information onto the LCD by 24-bit data from the MSM7500A.
LCD Module is supplied stable +2.8V_LCD by Out3 in U4001 for fine view angle and LCD reflects to
improve the display efficiency. 6 LEDs is used to display each LCD backlight.
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