PNX1702EH/G,557 NXP Semiconductors, PNX1702EH/G,557 Datasheet - Page 376
![no-image](/images/manufacturer_photos/0/4/487/nxp_semiconductors_sml.jpg)
PNX1702EH/G,557
Manufacturer Part Number
PNX1702EH/G,557
Description
IC MEDIA PROC 500MHZ 456-BGA
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1702EHG557.pdf
(832 pages)
Specifications of PNX1702EH/G,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Ram Size
208K x 8
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.33 V ~ 1.47 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-HBGA
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Lead Free Status / Rohs Status
Compliant
Other names
935281647557
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
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Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
Figure 6:
Current Pixel Extracted Alpha
Pixel Formatter Block
Previous Alpha
Previous Pixel
Mixer Block Diagram—Pixel Processing
New Pixel
Alpha_REG
2.6.2 Alpha Blending
2.7 Output Pipeline Structure
Alpha
Blending allows video and graphics to be combined with varying levels of
transparency. Blending is possible only when both current and previous Layer pixels
are valid. Either 16 or 256 levels of blend from one layer to another and vice versa are
available. The blend value may come from a layer’s alpha register or from the upper 4
or 8 bits of an incoming pixel or is a multiplication of both.
The blending is done according to the following equation:
Pixel_result = alpha x Pixel_current + (1-alpha) x Pixel_previous
Pre-multiplied pixel formats are supported. The Premult bit is set, which means the
incoming pixel stream is already pre-multiplied with the per-pixel alpha value. The
resulting alpha blend equation is as follows:
Pixel_result = Pixel_current + (1-alpha) x Pixel_previous
An additional per-component pre-multiply with a constant can be achieved by proper
programming of the color space matrix. Fading of alpha values is controlled by the
alpha_mix bit. If it is set, the pixel alpha gets multiplied by the fixed alpha value/256.
Remark: Alpha=255 has the effect, in hardware, of making alpha equal to 1 in the
above equations.
The input to the output pipeline comes from the mixers. The output pipeline houses
the formatter (FRMT) that produces the final output stream in the required output
format.
Invert_ROP
Rev. 1 — 17 March 2006
premult
Alpha_Use_REG
Alpha
Blend
Alpha_Pass_ROP
Alpha_ROP
Select_ROP
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Valid Pixel?
PNX17xx Series
next MIXER Stage
Previous Alpha for
Chapter 11: QVCP
New Mixed Pixel
11-19
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