19
The Logic part consists of internal CPU of MSM6100, MCP(SRAM& FLASH MEMORY) .
The MSM6100 receives TCXO (=19.2MHz) and controls the phone in both CDMA and FM modes.
The major components are as follows:
CPU : ARM926EEJ-S microprocessor core
MEMORY :
•
FLASH SRAM : 1G bits(Flash) + 512M bits(SRAM)
CPU
ARM926EEJ-S 32-bit microprocessor is used and CPU controls all the circuitry. Some of the features
of the ARM microprocessor include a 3 stage pipelined RISC architecture, both 32-bit ARM and 16bit
THUMB instruction setsm, a 32-bit address bus, and a 32-bit internal data bus.
FLASH Memory
Flash Memory is used to store the program of the mobile station. Using the down-loading program, the
program can be changed even after the mobile station is fully assembled.
SRAM
SRAM is used to store the internal flag information, call processing data, and timer data.
KEYPAD
For key recognition, key matrix is setup using GPIO46,47,50,51,52,53,62,63 of output ports of MSM.
Backlight circuitry are included in the keypad for easy operation in the dark.
LCD MODULE
LCD module contains a controller which will display the information onto the LCD by 16-bit data from
the MSM6100
It is also supplied 2.6V_MSMP by PMIC(MAX1827) for fine view angle and LCD reflects to
improve the display efficiency. White LEDs are used to display LCD backlight.
Z3X-BOX.COM
Summary of Contents for LG-UD90c
Page 1: ...CDMA PORTABLE CELLULAR PHONE LG UD90c SERVICE MANUAL Z 3 X B O X C O M ...
Page 23: ...LG KG90C 23 Waveform TCXO TCXO_OUTPUT X1100 Z 3 X B O X C O M ...
Page 27: ...LG KG90C 27 Test Point Circuit Diagram CON3100 X3100 X3100 pin3 Z 3 X B O X C O M ...
Page 29: ...LG KG90C 29 Test Point Circuit Diagram Mic R211 Mic bias resistor MSM6100 Z 3 X B O X C O M ...
Page 30: ...LG KG90C 30 5 When Receiver Earpiece isn t heard Checking Flow Z 3 X B O X C O M ...
Page 31: ...LG KG90C 31 Test Point Circuit Diagram R3000 R3001 U1409 Z 3 X B O X C O M ...
Page 33: ...LG KG90C 33 Test Point Circuit Diagram MOTOR_EN TP3001 Motor pad Z 3 X B O X C O M ...
Page 35: ...LG KG90C 35 Test Point Circuit Diagram U2001 Z 3 X B O X C O M ...
Page 37: ...LG KG90C 37 Test Point Circuit Diagram CON2000 Z 3 X B O X C O M ...
Page 39: ...LG KG90C 39 Test Point Circuit Diagram Blue Tooth ANT U2000 Z 3 X B O X C O M ...
Page 41: ...LG KG90C 41 Test Point Circuit Diagram U1409 U1403 CON 1401 U1401 Z 3 X B O X C O M ...
Page 42: ...LG KG90C 42 11 When Tx power isn t good enough Checking Flow Test Point Z 3 X B O X C O M ...
Page 43: ...LG KG90C 43 Circuit Diagram U1107 U1106 X1100 U1101 Z 3 X B O X C O M ...
Page 44: ...LG KG90C 44 Waveform Z 3 X B O X C O M ...
Page 46: ...LG KG90C 46 Test Point Circuit Diagram U1107 U1101 X1100 Z 3 X B O X C O M ...
Page 67: ...Z 3 X B O X C O M ...
Page 68: ...Z 3 X B O X C O M R1335 R1336 47K 10k변경 5 1 일 R1356 R1357 DNI 560k R1317 DNI 200K 변경 5 1일 ...
Page 70: ...Z 3 X B O X C O M C1510 100n 0 1uF 변경 5 1일 ...
Page 71: ...Z 3 X B O X C O M ...
Page 72: ...Z 3 X B O X C O M ...
Page 73: ...Z 3 X B O X C O M C2010 10n 6 8n 5 1일 변경 ...
Page 74: ...Z 3 X B O X C O M ...
Page 77: ...Z 3 X B O X C O M U3100 Charge pump Not LCD backlight on ...
Page 79: ...Z 3 X B O X C O M M2001 Microphone MIC not work ...
Page 81: ...Z 3 X B O X C O M U4009 Touch sensor Touch key not work ...
Page 82: ...Z 3 X B O X C O M ...