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DTVIIC(4)		 BSD Kernel Interfaces Manual		     DTVIIC(4)

NAME
     dtviic, au8522, cx24227, lg3303, mt2131, nxt2k, zl10353, tvpll, xc3028,
     xc5k — Inter IC (I2C) modules for DTV

DESCRIPTION
     The dtviic modules provide support for dtv(4) devices.  The dtviic module
     group includes tuners, demodulators, and analog video decoders.

     The usual hardware structure consists of a host controller (connected for
     instance via usb(4) or pci(4)) that provides the data moving facilities
     (for the analog or digital video streams) and an iic(4) bus over which
     the other chips can be configured.

     For example, a typical dtv(4) setup would look like this:

	   1.	Initialize transport stream (TS) port on the host controller.

	   2.	Configure the demodulator that “demodulates” the information
		from an intermediate frequency (IF) that is provided to it by
		the associated tuner.  This step typically includes setting
		the desired quadrature amplitude modulation (QAM) and band‐
		width, among other things.

	   3.	Configure the tuner.  Typically this step includes at least
		setting the frequency.

	   4.	Start TS transfer (using DMA transfers or USB high speed
		transfers).

     The supported demodulators include:

	   au8522      Auvitek AU8522 ATSC/QAM64/QAM256 demodulator

	   cx24227     Conexant CX24227 ATSC/QAM64/QAM256 demodulator

	   lg3303      LG LGDT3303 ATSC/QAM64/QAM256 demodulator

	   mt2131      MicroTune MT2131 ATSC demodulator

	   nxt2k       NxtWave Communications NXT2004 ATSC demodulator

	   zl10353     Zarlink ZL10353 (Intel CE623x) COFDM/DVB-T demodulator

     The supported tuners are:

	   tvpll       Generic PLL-based tuners

	   xc3028      XCeive XC3028 analog and digital tuner

	   xc5k	       Xceive XC5000 analog and digital tuner

FILES
	   ·   dvb-fe-nxt2004.fw needed by nxt2k

	   ·   xc3028-v27.fw or xc3028L-v36.fw (provided by
	       pkgsrc/sysutils/xc3028l-firmware) needed by xc3028

	   ·   dvb-fe-xc5000-1.6.114.fw needed by xc5k, provided by the
	       pkgsrc/sysutils/xc5k-firmware

SEE ALSO
     dtv(4), iic(4), module(7)

HISTORY
     The dtviic modules first appeared in NetBSD 6.0.

AUTHORS
     Authors include Jared D. McNeill ⟨jmcneill@NetBSD.org⟩, Jonathan A.
     Kollasch ⟨jakllsch@NetBSD.org⟩, and Jukka Ruohonen ⟨jruohonen@iki.fi⟩.

BSD				August 30, 2011				   BSD

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