Product Brief
SiI9251
PinnaClear
™
Input Processor
First input processor with Silicon Image’s patent-pending InstaPort™
instantaneous port switching technology
The PinnaClear SiI9251 input processor gives manufacturers the flexibility to add new
features to their HDTV platforms quickly and cost-effectively. In addition to managing all
the input interfaces into the DTV, input processors offer innovations in legacy analog
video inputs with high-quality 12-bit state-of-the-art ADCs and AVI interfaces, new MHL™
interfaces for HD mobile devices and InstaPort technology for faster port switching.
The highly integrated PinnaClear™ SiI9251
video input processor is the first multi-port
input processor for the high-end and mid-range
HDTV market. The SiI9251 features four HDMI
1.3 inputs that deliver Deep Color with 12 bits
of video at 1080p resolution and 60Hz. The
SiI9251 also includes four analog high-definition
component video inputs that support YCbCr
and RGB formats and a 5-input composite and
4-input S-Video switch capable of selecting three
composite outputs or two Y/C outputs.
The four HDMI input ports on the SiI9251 sup-
port MHL, a low pin-count, low power interface
designed for mobile CE devices. MHL technol-
ogy enabled mobile devices can be connected
directly to an SiI9251-equipped DTV without a
dock or dongle, with auto discovery of HDMI
or MHL source devices in the hardware.
The SiI9251 supports multiple audio formats
and all common audio sample rates up to
192kHz. Audio is available for output on an
S/PDIF port or an I
2
S port.
The SiI9251 analog video interface consists of
triple-channel 12-bit analog-to-digital converters
(ADCs) for capturing RGB and YPbPr inputs.
With conversion rates ranging from 12.5 MSPS
to 170 MSPS, the Analog Video Interface (AVI)
inputs capture 480i/576i to 720p/1080i/1080p
TV formats and PC graphic formats up to 1600
x 1200 (UXGA). An additional 12-bit ADC is
integrated for SCART compatibility to overlay
RGB data over CVBS. This fully integrated AVI
includes an internal voltage reference and an
anti-alias filter with selectable cutoff frequencies.
The SiI9251 processor also integrates a data
slicer/decoder to capture VBI data services.
In support of the processor’s HDMI functional-
ity, the the SiI9251 input processor comes pre-
programmed with HDCP keys to simplify
manufacturing and provide the highest level of
HDCP key security. The chip includes a 256-
byte Extended Display Identification Data
(EDID) RAM block and support for Consumer
Electronics Control (CEC) over a single wire
bus. SiI9251 supports extremely low standby
power with power islands enabling CEC and
EDID operations when the device is in shut-
down mode consuming less than 35mW.
Applications
• LCD, plasma and
projection DTVs
Key Features
• Patent-pending
InstaPort technology
• Four HDMI 1.3 input
ports support MHL
• Four component or
RGB inputs
• 12-bit ADC for Deep
Color analog video
• Four S-Video and
five CVBS inputs
• Full SCART support
• 2-channel digital
audio up to 192KHz
• Integrated CEC
• Four integrated
EDIDs with NVRAM
for each HDMI port
SiI9251 System Diagram
Game console
with HDMI
HD
Camcorder
Blu-ray DVD
Portable
Media Player
Up to 4 HDMI or MHL Sources
Set
Top
Box
PC
DV
D
Game console
with Component
SiI9251
Input
Processor
Standard
DVD
Up to 4 Component, S-Video or Composite Sources
SILICONIMAGE [ Silicon image ]
