Pantech PG-1810 Service Manual

Pantech PG-1810 Service Manual Manual pdf 15 page image

PG-1810 Service ManualPANTECH R&D CONFIDENTIAL144.1.3 Memory PartMemory consists of COMBO (flash ROM & SRAM).1 Flash ROMFlash ROM has a capacity of 256Mbit(32MByte). The main programs of the terminal(call processing,user interface, and diagnostic task) and supplemental programs (NAM program and test program)are stored in the flash ROM. Even if the program version may be changed in the future, customerscan download the program.2 Static RAMSRAM has a capacity of 64Mbit(8MByte) and stores system parameters, data buffer, and stack ofeach task in it.3 Key Tone GenerationAll alert signals are generated by the DSP and output to the EVBC.These alert can be used for the earpiece.4.1.4 Notification PartThe notification of incoming call is given by melody, vibrator.1) Melody:This is a device sounding alert/melody tones.The melody datas are stored in flash memory (U203) And generated by Melody IC(U117).2) Vibrator:This is a device enabling vibration. The vibrator data is stored in flash memory(U203)And generated by AD6535(U202).4.1.5 Key Pad PartTo enable key operation to input information, the key matrix is configured using strobe signal ofKEYPADROW(0-4) and 5 input ports of KEYPADCOL(0-4). Also, to use the key even at light, thebacklight circuit is provided for LED 17s.4.1.6 LCD Module(Display Part)LCD module consists of LCD, controller, LED-Backlight, and LCD reflector.using dual LCDMain LCD: 1S/W Icon x 1 lines[(128x3)x160] can be displayed on the LCD panel. 6 icons could beprovided by S/W. Controller with English font built in has been used.Sub LCD: 1S/W Icon x 1 lines[(128x3)x160] can be displayed on the LCD panel. 6 icons areprovided. Controller with English font built in has been used.LED-backlight Using illuminates the LCD panel, and LCD reflector enhances LCD display effect.