2.1.1 Platform
MT6228 is capable of running the ARM7EJ-Stm RISC processor at up to 104Mhz, thus
providing fast data processing capabilities. In addition to high clock frequency,
separate CODE and DATA caches are also added to further improve the overall system
efficiency.
For large amount of data transfer, high performance DMA (Direct Memory Access) with
hardware flow control is implemented, which greatly enhances the data movement
speed while reducing MCU processing load.
Targeted as a media-rich platform for mobile applications, MT6228 also provides
hardware security digital rights management for copyright protection. For future
safeguarding, and to protect manufacture’s development investment, hardware flash
content protection is also provided to prevent unauthorized porting of software load.
2.1.2 Memory
To provide the greatest capacity for expansion and maximum bandwidth for data
intensive applications such as multimedia features. MT6228 supports up to 4 external
state-of-the art devices through its 8/16-bit host interface.
High performance devices such as Mobile RAM, and Cellular RAM are supported for
maximum bandwidth.
Traditional devices such as burst/page mode Flash, page mode SRAM, and Pseudo
SRAM are also supported. For greatest compatibility, the memory interface can also be
used to connect to legacy devices such as Color/Parallel LCD, and multi-media
companion chip are all supported through this interface. To minimize power
consumption and ensure low noise, this interface is designed for flexible I/O voltage
and allows lowering of supply voltage down to 1.8V. The driving strength is
configurable for signal integrity adjustment. The date bus also employs retention
technology to prevent the bus from floating during turn over.
2.1.3 Multi-media
The MT6228 multi-media subsystem provides connection to CMOS image sensor and
supports resolution up to 3M pixels. With its advanced image signal and data
processing technology, MT6228 allows efficient processing of image and data. It also
has built-in JPEG CODEC and MPEG-4 CODEC, thus enabling real-time recording and
playback of high-quality images and video. Hardware MPEG4 accelerator supports
playback in VGA mode at 15fps, and encoding in CIF at 15fps. Videophone functionality
is also provided. Moreover, high quality de-blocking filter is provided to remove
blocking artifacts in video playback. GIF decoder and PNG decoder are implemented as
well for fast image decoding. MT6228 supports TV-OUT capability, thus allowing the
mobile handset to connect to TV screen via NTSC/PAL connections.
In addition to advanced image and video features, MT6228 also utilizes high resolution
DAC, digital audio, and audio synthesis technology to provide superior audio features
for all future multi-media needs.
Содержание SP-770
Страница 1: ...SP 770 AS Manual GSM GPRS Cellular Phone SKYSPRING VITELCOM...
Страница 6: ...SECTION1 SP 770 PRODUCT OVERVIEW...
Страница 27: ...Figure4 Battery Charger Flow chart...
Страница 36: ...SECTION2 SCHEMATIC LAYOUT 1 MAIN PART SCHEMATIC LAYOUT 1 1 BASEBAND PART...
Страница 37: ...1 2 MMI PART...
Страница 38: ...1 3 RF PART...
Страница 39: ...2 MAIN KEY PART SCHEMATIC LAYOUT...
Страница 40: ...3 LCD...
Страница 41: ...SECTION3 PCB LAYOUT 1 MAIN PCB 1 1 Location Map of Main PCB Top...
Страница 42: ...1 2 Location Map of Main PCB Bottom...
Страница 43: ...2 MAIN KEY PCB 2 1 Location Map of Main KEY PCB Top...
Страница 44: ...2 2 Location Map of Main KEY PCB Bottom...
Страница 45: ...3 LCD PCB...
Страница 46: ...SECTION4 MECHANICAL ASSEMBLY...
Страница 48: ...3 LOGIC PART TROUBLESHOOTING...
Страница 50: ...3 2 Troubleshooting 2 LCD Display Backlight error...
Страница 51: ...3 3 Troubleshooting 3 Key push error...
Страница 52: ...3 4 Troubleshooting 4 Vibrator error...
Страница 53: ...3 5 Troubleshooting 5 MP3 Play error...
Страница 54: ...3 6 Troubleshooting 6 Camera Preview error...
Страница 55: ...3 7 Troubleshooting 7 FM Radio Play error...
Страница 57: ...3 9 Troubleshooting 9 Bluetooth error...
Страница 58: ...4 RF PART TROUBLESHOOTING...
Страница 59: ...4 1 Troubleshooting 10 RX path check...
Страница 60: ...4 2 Troubleshooting 11 TX path check...
Страница 64: ...4 Settings 4 1 Flash Tool setting 1 Firstly Check values of the setting in an Options menu...
Страница 66: ...5 SW Downloading 1 Connect LT cable to the PC 2 Press the Download button...
Страница 67: ...3 Connect LT cable to the target mobile phone with power off 4 Completion of downloading...
Страница 74: ...5 4 Save back up NVRAM data as a file Save back up NVRAM data from target as a file...
Страница 77: ...6 4 Download to flash Click download to flash button and then updating parameters is complete...