Part - Pantech PG-1810 Service Manual

PG-1810 Service Manual
4.1.3 Memory Part
Memory consists of COMBO (flash ROM & SRAM).
1 Flash ROM
Flash 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, customers
can download the program.
2 Static RAM
SRAM has a capacity of 64Mbit(8MByte) and stores system parameters, data buffer, and stack of
each task in it.
3 Key Tone Generation
All alert signals are generated by the DSP and output to the EVBC.
These alert can be used for the earpiece.
4.1.4 Notification Part
The 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 Part
To enable key operation to input information, the key matrix is configured using strobe signal of
KEYPADROW(0-4) and 5 input ports of KEYPADCOL(0-4). Also, to use the key even at light, the
backlight 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 LCD
Main LCD: 1S/W Icon x 1 lines[(128x3)x160] can be displayed on the LCD panel. 6 icons could be
provided 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 are
provided. Controller with English font built in has been used.
LED-backlight Using illuminates the LCD panel, and LCD reflector enhances LCD display effect.
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PANTECH R&D CONFIDENTIAL