Model
MASS 2
Version
V_1.0
Prepared by
H/W
Date
22/01/2008
Subject Technical
Manual Page
25/59
Figure 19. RTC Circuit
Auxiliary ADC Unit
The auxiliary ADC unit is used to monitor the status of battery and charger, identify the plugged peripheral and perform
temperature measurement. There provides 7 input channels for diversified application in this unit.
In MASS 2, 6 ADC port are used as shown Figure 20.
Figure 20. AUXADC Circuit
1)
ADC0/1_I-/+ : Check the Battery and Charger voltage.
2)
ADC2_TBAT : Connected to battery ID Resistor. Check the Battery Temperature by NTC ID Resistor(10Kohm),
So, the voltage is about 0.6V in normal temperature.
3)
ADC3_VCHG : Check and detect the the charger. If charger is connected the Voltage is changed from 0V to 1V.
So, MT6228 can know the charger inserted.
4)
ADC4_USB : Check and detect the USB cable. If USB cable is inserted, voltage of ADC4_USB pin is changed
from 2.8V to 0V (2.8V
Æ
Pulse
Æ
0V). So, MT6228 can know the USB cable inserted.
5)
ADC5_HF_MIC : Check and Detect the Headset(Ear Microphone). If Ear microphone is inserted, the voltage of
ADC5_HF_MIC is changed from 2.8V to about 1.5V(1.2~1.8V. depending on CMIC resistance).
6)
ADC6_REMOTE : Check and operating the remote control headset(MP3 Remote Control Headset)
5.
Multi-Media Subsystem
MT6225 is specially designed to support multi-media terminals. It integrates several hardware based accelerators, like
advanced LCD display controller and hardware Image Resizer. Besides, MT6225 also incorporates NAND Flash, USB 1.1
Device and SD/MMC/MS/MS Pro Controllers for massive data transfers and storages. This chapter describes those
functional blocks in detail.
6.1
LCD Interface
MT6225 contains a versatile LCD controller, which is optimized for multimedia applications. This controller supports many
types of LCD modules and contains a rich feature set to enhance the functionality.
These features are:
-. Up to 320 x 240 resolution
-. The internal frame buffer supports 8bpp indexed colour, RGB 565 format.
-. Supports 8-bpp (RGB332), 12-bpp (RGB444), 16-bpp (RGB565), 18-bit (RGB666) and 24-bit (RGB888) LCD modules.
Содержание MASS2
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