Major Ic Informations - Sharp LC-26D4U Service Manual

● IC8101 (RH-IXB145WJQZQ)
An LSI of a MPEG-2 system decoder that performs back-end processing for digital broadcasting. This is
equipped with a CPU (processor core: AM33-3), descrambler (DES), transport stream demultiplexer, video
decoder (MPEG-2 MP@HL compatible), graphic processor, audio decoder (AC3 compatible), and an NTSC
video encoder.
After receiving transport stream from the tuner, the LSI decrypts pay-TV broadcasts with the descrambler. Then
using the demultiplexer, it separates and decodes the compressed audio and video data to send the signals. In
the visual system, the graphic processor makes it possible to overlap subtitles and perform scaling. Digital
video signals (Y, Pb and Pr, or 480I/P, 720P and 1081I) and downconverted NTSC signals (Y/C and composite,
or 480I) can be sent simultaneously. As for the audio system, decoded AC3 audio can be overlapped with
sound effects.
The LSI also contains various interfaces (I2C x 2, UART x 3, an SD Memory Card interface, a CableCARD
interface, etc.) and a GPIO. Using these interfaces, the CPU controls peripheral circuits of the tuner, SD
Memory Cards, CableCARDs, etc. One of the UARTs is used by the CPU to establish communications with the
monitor microcomputer in the unit, where remote control information or other data is exchanged. Another UART
is used for RS-232C serial communications to connect the unit to a PC.

MAJOR IC INFORMATIONS

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LC-26D4U
LC-32D4U
LC-37D4U