The logic part consists of internal CPU of MSM, RAM(MCP). The MSM6050 receives TCXO (=19.2MHz)
from F1301 and controls the phone in both CDMA and FM modes. The major components are as follows:
z
CPU
The ARM9TDMI 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.
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MCP
Flash ROM 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.
SRAM is used to store the internal flag information, call processing data, and timer data.
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KEYPAD
For key recognition, key matrix is setup using KYPD[1][3][5][7][9][11][13][15][17][19][21] signal from
MSM. 17 LEDs and backlight circuitry are included in the keypad for easy operation in the dark.
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LCD MODULE
LCD module contains a controller which will display the information onto the LCD by 16-bit data from the
MSM6050. It is also supplied stable 2.8.V_VMLED from U3201 for fine view angle and LCD reflects to
improve the display efficiency. 4 LEDs are used to display LCD backlight.
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Summary of Contents for LG- PX240
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