Toshiba D-VR3SU, Service Manual

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Circuit Operating Descriptions
7-6
3) Bitstream/Storage interface
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ATAPI Controller
ATAPI is an asynchronous, 120ns, 16-bit word interface commonly used to connect devices such as hard
disks, CD/DVD ROMs, and DVD RAMs. All operations are initiated by reading/writing a set of ATAPI
device registers through programmed input/output(PIO) data transfer. ATAPI has DMA commands for
transferring long data. The ATAPI register address is defined by the output pins CS0, CS1, DA[2:0].
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The IEEE1394 interface can receive MPEG-2 transport stream or DV stream data contained in isochronous
packets (IPs). The DMN-8602 device filters the packets by matching channel IDs. In the case of MPEG-2
transport streams, the DMN-8602 device performs descrambling on the data that is scrambled with 5C
encryption. Software is responsible for transport section processing and demultiplexing.
4) Video Interface
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Video Input channel
The video input channel captures ITU-R BT.656-compliant 10-bit digital YUV component video stream from
Video decoder chip(TIC1)
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Video Digital Encoder (DENC)
The NTSC/PAL digital video encoder (DENC) module converts a digital video data stream into NTSC or
PAL composite or component video output.
The DMN-8602 DENC output can be in one of the following formats:
•Baseband composite NTSC (M) or PAL (B,D,G,H,I) analog video.
•Separate analog luma(Y) and chroma(C) output to support S-Video.
•Separate analog component video RGB or SMPTE YPbPr output.
5) Audio Interface
The serial audio input port receives uncompressed 16- to 24-bit serial digital audio data from external audio
ADC(AIC9). An internally generated clock provides bit serial clocking of the data coming from external ADC
The serial audio output port sends uncompressed 16- to 24-bit serial digital audio data to external audio
DAC(AIC1). An internally generated clock provides bit serial clocking of the data coming from external ADC
6) Serial I/O interface
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SPI interface
The SPI(Serial Peripheral Interface) port provides a bus for a serial interface with front panel micom(FIC1)
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IDC interface
The IDC bus is a simple, two-wire, bidirectional communication bus. The two signals, clock and data, are com
mon to every device connected to the bus.
In this system, IDC bus is connected to EEPROM(DIC8) and Video Decoder(TIC1)