DTVIIC(4) | Device Drivers 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 bandwidth, 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⟩.

August 30, 2011 | NetBSD 10.0