BSP-15 Equator Technologies, BSP-15 Datasheet - Page 26

• Manufacturer Part Number: BSP-15
• Description: Broadband Signal Processor
• Manufacturer: Equator Technologies

14
2.7 I/O Interfaces
2.7.1 Audio Interfaces
2.7.1.1 IEC958 Audio Interface
2.7.1.2 IIS Interface
2.7.2 Video Interfaces
2.7.2.1 Transport Channel Interfaces
BSP-15 Processor Datasheet
The BSP-15 DSP has two modes of operation, digital RGB (dRGB) output mode and analog RGB
(aRGB) output mode. The analog RGB mode is the primary I/O mode for most applications. In addition
there is a second digital RGB video output mode used for driving LCD displays for use in PDA, video
conferencing or other LCD applications.
This interface supports a multitude of audio, video, data and control interfaces:
The BSP-15 DSP’s IEC958 interface can insert even or odd parity on each sub-frame of the output bit
stream.
The Inter-IC Sound (IIS) interface drives high quality audio D/A converters for home theater. The
BSP-15 DSP’s interface meets the requirements of the standard serial data protocol and provides
connection for up to three stereo DACs and one ADC. The interface supports 48 kHz, 44.1 kHz, and
32 kHz audio sample rates. Simultaneous input and output must be at the same sample rate. The BSP-15
DSP’s IIS supports both master and slave mode interface. In slave mode there is the choice of using
either external inputs or internally generated signals for the sample rate clock and serial bit clock.
The BSP-15 DSP provides two video input ports and one video output port. Each input port supports
either transport channel interface input or ITU-R BT.601/656 input. The output port supports an ITU-R
BT.601/656 compliant output.
In addition, the primary video input port and/or the output port can be used in a general purpose mode
for transferring data (general purpose data port) for input or output respectively.
The video input unit implements two DVB compliant transport channel interfaces which receive
demodulated channel data in transport layer format. The transport channel interface (TCI) accepts
MPEG-2 system transport packets in either byte parallel or, by default, bit serial form. Data rates up to
80 Mbps (serial) or 30 MBps (byte-wide parallel) are supported. By default, serial data is input on
tci_data[0] and parallel data is input on tci_data[7:0] with bit 7 the most significant. These
orientations can be reversed by PIO programming.
The TCI synchronizes packet data received in broadcast applications such as satellite or cable. The TCI
can detect inline sync bytes, which are the first byte of every transport header. Alternatively, the TCI can
utilize the external tci_sync signal. Once byte-sync has been detected, the TCI moves byte-aligned
data into the BSP-15 DSP’s memory using the DataStreamer DMA controller.
The number of bytes in each packet is programmable. At the end of every packet, the TCI appends an
eight-byte postscript that includes time stamps from the local clock counters. This information can be
• Sony/Philips Digital Interface (S/PDIF)
• Audio Engineering Society/European Broadcast Union (AES/EBU) interface
• TOSLINK interface (requires external IR devices)
HWR.BSP15.DS.REV.H
September 6, 2002