HSP48212 Datasheet, PDF (1/9 Pages) Intersil Corporation – Digital Video Mixer

Data Sheet
HSP48212
May 1999 File Number 3627.2
Digital Video Mixer
The Intersil HSP48212 is a 68 pin Digital Video Mixer IC
intended for use in multimedia and medical imaging
applications.
The HSP48212 allows the user to mix two video sources
based on a programmable weighting factor. After weighting
the input data signals, the Video Mixer simply adds the two
weighted signals mathematically. This results in the mixed
output, which is a weighted sum of the two sources.
The input and output interfaces are synchronous with respect
to the input clock, simplifying the user interface requirements.
Input Data (DINA, DINB), Mix Factor (M) and control signals
(RND, TCB) may be delayed relative to each other in order to
compensate for any misalignment that may have occurred
prior to entering the HSP48212. Each input’s delay may be
independently programmed up to seven clock cycles.
The output data may be rounded to 8, 10, 12, or 13-bits. The
enabling of data onto the output data bus is under the user’s
control via an output enable signal (OE).
Ordering Information
PART NUMBER
HSP48212VC-40
HSP48212JC-40
TEMP.
RANGE (^oC)
PACKAGE
0 to 70 64 Ld MQFP
0 to 70 68 Ld PLCC
PKG. NO.
Q64.14x14
N68.95
Block Diagram
Features
• 12-Bit Pixel Data
• Two’s Complement or Unsigned Data
• 12-Bit Mix Factor
• 13-Bit Signed or Unsigned Three State Output
• Overflow Detection and Output Saturation
• Rounding to 8, 10, 12, or 13-Bits
• Input and Output Pixel Data Synchronous to Clock
• Programmable Pipeline Delay of up to 7 Clock Cycles for
Control of Misaligned Input Data
• TTL Compatible Inputs/Outputs
• DC to 40MHz Clock Rate
Applications
• Video Summing (Frame Addition)
• Video Mixing
• Fade In/Out
• Video Switching
• High Speed Multiplying
TCB
DELAY
0-7
DINB0-11
12
DELAY
0-7
1-M
M
12
DELAY
0-7
RND0-1
2
DELAY
0-7
SHIFT
Σ
LEFT
DOUT0-12
13
DINA0-11
12
DELAY
0-7
OE
DOUT = 2 x [DINA x M + DINB x (1-M)]
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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