Pantech PG-1400, Руководство по обслуживанию

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PG-1400 Service Manual
SRAM has a capacity of 32Mbit(4MByte) 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 ABB audio output.
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 (U509) And generated by Melody IC(U301).
2) Vibrator:
This is a device enabling vibration. The vibrator data is stored in flash memory(U509)
And generated by K18(GPIO_3)pin.
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 output 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, Indicator and Vibrator Driver IC.
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.
LED-backlight Using illuminates the LCD panel, and LCD reflector enhances LCD display effect.
4.1.7 CAMERA Module
Camera Module is activated by keypad sw125.
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