Vox Technologies EMB-9670 series, User Manual, Page: 20 / 101

EMB-9670/9673 Series
20 EMB-9670/9673 Series User’s Manual
1.6.6 Chrontel CH7009 TV/DVI Transmitter
The Chrontel CH7009 is a display controller device which accepts a digital graphics input
signal, and encodes and transmits data through a DVI (DFP can also be supported) or 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 DVI processor includes a low jitter PLL for generation of the high frequency serialized
clock, and all circuitries are required to encode, serialize and transmit data. The CH7009
comes in versions able to drive a DVI display at a pixel rate of up to 165MHz, supporting
UXGA resolution displays. No scaling of input data is performed on the data output to the
DVI device.
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 IDE Interface (Bus Master Capability and Synchronous DMA Mode )
The fast IDE interface supports up to four IDE devices providing an interface for IDE hard
disks and ATAPI devices. Each IDE device can have independent timings. The IDE
interface supports PIO IDE transfers up to 16 Mbytes/sec and Ultra ATA transfers up 100
Mbytes/sec. It does not consume any ISA DMA resources. The IDE interface integrates
16x32-bit buffers for optimal transfers.
The ICH4’s IDE system contains two independent IDE signal channels. They can be
electrically isolated independently. They can be configured to the standard primary and
secondary channels (four devices). There are integrated series resistors on the data and
control lines.
Access to these controllers is provided by two standard IDC 40-pin connectors.
1.6.9 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.