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User’s Manual
ESM-2740/2743 User’s Manual
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1.6.6 Chrontel CH7011 TV Transmitter
The CH7011 is a Display controller device which accepts a digital graphics input signal, and
encodes and transmits data to a TV output (analog composite, s-video or RGB). The device
accepts data over one 12-bit wide variable voltage data port which supports five different
data formats including RGB and YCrCb.
The TV-Out processor will perform non-interlace to interlace conversion with scaling and
flicker filters, and encode the data into any of the NTSC or PAL video standards. The
scaling and flicker filter is adaptive and programmable to enable superior text display. Eight
graphics resolutions are supported up to 1024 by 768 with full vertical and horizontal
underscan capability in all modes. A high accuracy low jitter phase locked loop is integrated
to create outstanding video quality. Support is provided for Macrovision™ and RGB bypass
mode which enables driving a VGA CRT with the input data.
1.6.7 PCI Interface
The ICH4 PCI interface provides a 33 MHz, Rev. 2.2 compliant implementation. All PCI
signals are 5V tolerant, except PME#. The ICH2 integrates a PCI arbiter that supports up to
six external PCI bus masters in addition to the internal ICH4 requests.
1.6.8 USB 2.0
The ICH4 contains an Enhanced Host Controller Interface (EHCI) compliant host controller
that supports USB high-speed signaling. High-speed USB 2.0 allows data transfers up to
480Mb/s which is 40 times faster than full-speed USB. The ICH4 also contains three
Universal Host Controller Interface (UHCI) controllers that support USB full-speed and
low-speed signaling.
The ICH4 supports 6 USB 2.0 ports. All six USB ports are high-speed, full-speed, and
low-speed capable. ICH4’s port-routing logic determines whether a USB port is controlled
by one of the UHCI controllers or by the EHCI controller.