pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 371

• Manufacturer Part Number: pnx1500
• Description: Pnx15xx Series Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
PNX15XX_SER_3
Product data sheet
Figure 5:
Current_Chroma_Key_0
Current_Chroma_Key_1
Current_Chroma_Key_2
Current_Chroma_Key_3
Previous_Chroma_Key_0
Previous_Chroma_Key_1
Previous_Chroma_Key_2
Previous_Chroma_Key_3
new_Pixel_Key1
new_Pixel_Key2
previous_Key
ColorKeyMaskP
Register
ColorKeyMask
Register
Mixer Block Diagram—Pixel Selection
PassColorKey0-3 register settings
00 pass zeros to the next mixer
01 pass current color key to next mixer
10 pass previous color key to next mixer
00 reserved
2.6.1 Key Generation
Previous_Chroma_Key_3:0
for next MIXER stage
&
1
&
0 0 0 0
Rev. 3 — 17 March 2006
1
1
PassColorKey0
PassColorKey1
PassColorKey2
PassColorKey3
Key2
Key0
Key1
Key3
Color
Depth
2bpp
8bpp
15bpp
16bpp
24bpp
32bpp
Note: The generation of the new_Pixel_Key
happens in the pixel formatter block, not in the
mixer.
KeyPass
AlphaPass
InvertROP
SelectROP
AlphaBlend
New_Pixel_
Key2
p[1]
0
p[15]
0
0
p[31:24] &&
Pixel
KeyAnd[31:24]
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
KEY
ROP
ALP
ROP
KEY
ROP
SEL
ROP
INV
ROP
PNX15xx Series
Select_ROP
Invert_ROP
Alpha_ROP
Alpha_Pass_ROP
Key_Pass_ROP=
NewPixelKey=
Previous_Key
Chapter 11: QVCP
New_Pixel_
Key1
p[0]
0
0
0
0
0
11-18