Samsung SPH-A940 Service Manual page 7

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Keypad
For key recognition, key matrix is operated by using SCAN(0:7) and KEYSENCE(0:3) of the input ports
of MSM. 23 backlight LEDs and back-light circuitry are included in the keypad for easy operation in the
dark.
LCD Module
LCD is composed of a Transmissive with Micro Reflective(TMR) type Main TFT-LCD Panel, Transflective
type Sub TFT-LCD Panel, a driver circuit and a back-light unit.
The resolution of a 2.0" Main LCD(TMR) contains 176 * 220 pixels, the resolution of a 1.17" Sub
LCD(Transflective) contains 96 * 96 pixels.
Clock
CPU clock
: 19.2MHz. Clock signal from the TCXO
Sleep clock : 32.768KHz. Clock signal for sleep.
TCXO/N
: 19.2/N MHz. This clock source is used by various blocks of the MSM6500 device, such
as the ARM9CORE, UARTs, general-purpose PDMs and TCXO is also used by the
MSM6500 device to produce CHIPX8.
USB clock
: 48MHz. Clock signal for the USB interface
CAMERA
The camera module consists of 1/3 type 2 Mega (2140K) Pixels CCD sensor, Digital signal processor,
and MPU. The camera module provides Auto Focus, 2x Optical Zoom, Auto Exposure, and Auto White-
Balance functionality.
CCP (Camera Control Processor)
CCP can support sensors up to 2M pixels. CCP directly transmits and previews the RGB data to the
LCD graphic memory by processing the sensor output data according to the MSM's command and
provides hardware based real-time JPEG compression and decompression. CCP can save the raw RGB
data up to SVGA resolution into its image buffer and allows the host processor to download with
scalable sized compressed data. In addition, CCP can download the compressed image to either store
the original RGB data or transfer the image to the LCD.
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2-3
Circuit Description

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