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HMP8154 PDF даташит

Спецификация HMP8154 изготовлена ​​​​«Intersil Corporation» и имеет функцию, называемую «NTSC/PAL Encoders».

Детали детали

Номер произв HMP8154
Описание NTSC/PAL Encoders
Производители Intersil Corporation
логотип Intersil Corporation логотип 

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HMP8154 Даташит, Описание, Даташиты
Data Sheet
HMP8154, HMP8156A
October 1998
File Number 4343.3
NTSC/PAL Encoders
The HMP8154 and HMP8156A NTSC and PAL encoders
are designed for use in systems requiring the generation of
high-quality NTSC and PAL video from digital image data.
YCbCr or RGB digital video data drive the P0-P23 inputs.
Overlay inputs are processed and the data is 2x upsampled.
The Y data is optionally lowpass filtered to 6MHz and drives
the Y analog output. Cb and Cr are each lowpass filtered to
1.3MHz, quadrature modulated, and summed. The result
drives the C analog output. The digital Y and C data are also
added together and drive the two composite analog outputs.
The YCbCr data may also be converted to RGB data to drive
the DACs, allowing support for analog component RGB and
the European SCART connector.
The DACs can drive doubly-terminated (37.5) lines, and
run at a 2x oversampling rate to simplify the analog output
filter requirements. Any unused DACs may be powered down
to reduce power consumption.
Ordering Information
TEMP.
PART NUMBER RANGE (oC) PACKAGE
PKG. NO.
HMP8154CN
0 to 70 64 Ld PQFP Q64.14x14
HMP8156ACN
0 to 70 64 Ld PQFP Q64.14x14
HMP8154EVAL1 Daughter/Stand-Alone Card Evaluation
HMP8156EVAL1 Platform (Note)
HMP8156EVAL2 Frame Grabber Evaluation Platform (Note)
NOTE: Described in the Applications Section
Features
• (M) NTSC and (B, D, G, H, I, M, N, CN) PAL Operation
• ITU-R BT.601 and Square Pixel Operation
• Digital Input Formats
- 4:2:2 YCbCr
- 8-Bit or 16-Bit
- 4:4:4 RGB
- 16-Bit (5, 6, 5) or 24-Bit (8, 8, 8)
- Linear or Gamma-Corrected
- 8-Bit BT.656
• Overlay Mixing
- 7 Colors
- Internal, External, or Hard Mixing Control
• Analog Output Formats
- Y/C + Two Composite
- RGB + Composite (SCART)
• Flexible Video Timing Control
- Timing Master or Slave
- Programmable Input Sync Timing
- Selectable Polarity on Each Control Signal
- Programmable Blank Output Timing
- Field Output
• Closed Caption Encoding for NTSC and PAL
• 2x Upscaling of SIF Video
• Three Line Vertical Flicker Filter
(HMP8154 only)
• Four 2x Oversampling, 10-Bit DACs with Power Down
• I2C Interface
• Verilog Models Available
Applications
• Multimedia PCs
• Video Conferencing
• Video Editing
• Related Products
- NTSC/PAL Encoders:
HMP8170-HMP8173
- HMP8190/91
- NTSC/PAL Decoders:
HMP8112A, HMP8115, HMP8116, HMP8130/31
1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999









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HMP8154 Даташит, Описание, Даташиты
Functional Block Diagram
P0 - P23
OPTIONAL
GAMMA
CORRECTION
COLOR
SPACE
CONVERSION
Y/Cb/Cr
4:4:4
(2:2:2 SIF)
4:2:2 TO
4:4:4 SAMPLE
CONVERSION
SA
SCL
SDA
RESET
HOST
INTERFACE
HSYNC
VSYNC
BLANK
CLK
CLK2
VIDEO
TIMING
CONTROL
FIELD
OVERLAY
PROCESSING
2X
UPSCALING
(SIF MODE)
FLICKER
FILTER
(HMP8154
ONLY)
CLOSED
CAPTIONING
PROCESSING
2X
UPSAMPLE
4:4:4
TO
8:8:8
Y
Cb/Cr
(OPTIONAL)
LP FILTER
LP FILTER
CHROMA
MODULATION
INTERNAL
1.225V
REFERENCE
DAC
DAC
DAC
DAC
VREF
FS
ADJUST
Y/G
NTSC/
PAL 1
NTSC/
PAL 2/
R
C/B









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HMP8154 Даташит, Описание, Даташиты
HMP8154, HMP8156A
Functional Operation
The HMP8154 and HMP8156A are fully integrated digital
encoders. Either accepts digital video input data and
generates four analog video output signals. The input data
format is selectable and includes YCbCr, RGB, and overlay
data. The outputs are configurable to be either two
composite video signals and Y/C (S-Video) or one
composite and component RGB video.
The HMP8154/HMP8156A accepts pixel data in one of
several formats and transforms it into 4:4:4 sampled
luminance and chrominance (YCbCr) data. If enabled, the
encoder also mixes overlay data with the input data. The
encoder then interpolates the YCbCr data to twice the pixel
rate and low pass filters it to match the bandwidth of the
video output format. If enabled, the encoder also adds
Closed Captioning information to the Y data. At the same
time, the encoder modulates the chrominance data with a
digitally synthesized subcarrier. Finally, the encoder outputs
luminance, chrominance, and their sum as analog signals
using 10-bit D/A converters.
The HMP8154/HMP8156A provides operating modes to
support all versions of the NTSC and PAL standards and
accepts full and SIF size input data with rectangular (ITU-R
BT.601) and square pixel aspect ratios. It operates from a
single clock at twice the pixel clock rate determined by the
operating mode.
The HMP8154/HMP8156A’s video timing control is flexible. It
may operate as the master generating the system’s video
timing control signals or it may accept external timing
controls. The polarity of the timing controls and the number
of active pixels and lines are programmable.
The HMP8154 provides optional vertical flicker reduction.
When enabled, the encoder passes the pixel data after
overlay processing through a three line flicker filter.
Pixel Data Input Formats
The HMP8154 accepts pixel data via the P0-P23 input pins.
The definition of each pixel input pin is determined by the
input format selected in the input format register. The
definition for each mode is shown in Table 1.
YCbCr Pixel Data
The HMP8154/HMP8156A accepts 4:2:2 sampled YCbCr
input data. The luminance and color difference signals are
each 8 bits, scaled 0 to 255. The nominal range for Y is 16
(black) to 235 (white). Y values less than 16 are clamped to
16; values greater than 235 are processed normally. The
nominal range for Cb and Cr is 16 to 240 with 128
representing zero. Cb and Cr values outside their nominal
range are processed normally. Note that when converted to
the analog outputs, some combinations of YCbCr outside
their nominal ranges would generate a composite video signal
larger than the analog output limit. The composite signal will
be clipped but the S-video outputs (Y and C) will not be.
The color difference signals are time multiplexed into one
8-bit bus beginning with a Cb sample. The Y and CbCr
busses may be input in parallel (16-bit mode) or may be time
multiplexed and input as a single bus (8-bit mode). The
single bus may also contain SAV and EAV video timing
reference codes (BT.656 mode).
RGB Data
The HMP8154/HMP8156A accepts 4:4:4 sampled RGB
component video input data. The color signals may be
(8,8,8) for 24-bit mode or (5,6,5) for 16-bit mode. In 24-bit
mode, they are scaled 0 to 255, black to white. In 16-bit
mode, the encoder left shifts the input so that it has the same
scale as 24-bit input. The RGB data may be linear or gamma
corrected; if enabled, the encoder will gamma correct the
input data.
Overlay Data
The HMP8154/HMP8156A accepts 5 bits of pixel overlay
input data and combines it with the input pixel data. The data
specifies an overlay color and the fractions of the new and
original colors to be summed.
Blue Screen Generation
In blue screen mode, the HMP8154/HMP8156A ignores the
pixel input data and generates a solid, blue screen. The
overlay inputs may be used to place information over the
blue screen.
Input Processing
Color Space Conversion
For linear RGB input formats, the encoder applies gamma-
correction using a selectable gamma value of 1/2.2 or 1/2.8.
The gamma-corrected RGB data from either the correction
function in linear mode or the input port otherwise is
converted to 4:4:4 sampled YCbCr data.
For the YCbCr input formats, the encoder converts the 4:2:2
sampled data to 4:4:4 sampled data. The conversion is done
by 2x upsampling the Cb and Cr data. The upsampling
function uses linear interpolation.
Overlay Processing
The HMP8154/HMP8156A accepts overlay data via the
OL0-OL2, M0, and M1 pins. Overlay mixing is done using
the 4:4:4 YCbCr pixel data from the color space converter.
The YCbCr data following overlay processing is used as
input data by the video processing functions.
The OL0-OL2 inputs select the color to be mixed with the
pixel data. Overlay colors 1-7 are standard color bar colors.
Overlay color 0 is special and disables mixing on a pixel-by-
pixel basis. The overlay color palette is shown in Table 2.
3










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Номер в каталогеОписаниеПроизводители
HMP8154NTSC/PAL EncodersIntersil Corporation
Intersil Corporation
HMP8154CNNTSC/PAL EncodersIntersil Corporation
Intersil Corporation
HMP8154EVAL1NTSC/PAL EncodersIntersil Corporation
Intersil Corporation
HMP8156NTSC/PAL EncoderIntersil Corporation
Intersil Corporation

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