HMP8156
NTSC/PAL Encoder
August 1997
Features
Description
• (M) NTSC and (B, D, G, H, I, M, N, CN) PAL Operation
• ITU-R BT.601 and Square Pixel Operation
The HMP8156 NTSC and PAL encoder is designed for use
in systems requiring the generation of high-quality NTSC
and PAL video from digital image data.
• Digital Input Formats
- 4:2:2 YCbCr
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 5MHz 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.
- 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 Parallel ITU-R BT.656
- Seven Overlay Colors
The YCbCr data may also be converted to RGB data to drive
the DACs, allowing support for the European SCART con-
nector.
• Analog Output Formats
- Y/C + Two Composite
The DACs can drive doubly-terminated (37.5Ω) lines, and
run at a 2x oversampling rate to simplify the analog output
filter requirements.
- RGB + Composite (SCART)
• Flexible Video Timing Control
- Timing Master or Slave
Table of Contents
Page
- Selectable Polarity on Each Control Signal
- Programmable Blank Output Timing
- Field Output
Functional Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . 2
Functional Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pixel Data Input Formats . . . . . . . . . . . . . . . . . . . . . . . . . 3
Input Processing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pixel Input and Control Signal Timing. . . . . . . . . . . . . . . . 5
Video Timing Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Video Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Analog Outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Host Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Pin Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Applications Information . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Evaluation Kits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
• Closed Caption Encoding for NTSC and PAL
• 2x Upscaling of SIF Video
• Four 2x Oversampling, 10-Bit DACs
2
• I C Interface
• Verilog Models Available. . . . . . . . . . . . . . . . . . . . . . . . .
Applications
• Multimedia PCs
• Video Conferencing
• Video Editing
• Related Products
- NTSC/PAL Encoders: HMP8154
- NTSC/PAL Decoders: HMP8112A, HMP8115
Ordering Information
TEMP.
o
PART NUMBER RANGE ( C)
PACKAGE
PKG. NO.
HMP8156CN
0 to 70
64 PQFP
Q64.14x14
HMP8156EVAL1
HMP8156EVAL2
Daughter Card Evaluation Platform (Note)
Frame Grabber Evaluation Platform (Note)
NOTE: Described in the Applications Section
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
File Number 4269.3
http://www.intersil.com or 407-727-9207 | Copyright © Intersil Corporation 1999
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