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TVP4010 and TVP4020 Differences
TVP4020
Programmers Reference Manual
296
F3.3
Host Out DMA engine
A DMA engine has been added to the PCI interface to allow high speed
transfers from the graphics core output FIFO to system memory.
F3.4
Extra Interrupts
The following interrupts have been added to TVP4020.
•
Invalid texture
•
Bypass DMA complete
•
Video stream A interrupt
•
Video stream B interrupt
•
Video streams external interrupt
•
DDC interrupt
F4
Video Unit Differences
F4.1
FIFO Threshold Control
Programmable high and low watermarks have been added to the video
FIFO to allow optimum bursting of video data for different screen
resolutions.
F4.2
Stereo Control
Support has been added for left and right eye screens that are displayed
alternately. An external pin signals which eye is being displayed and
may be used to drive LCD shutter glasses.
F4.3
Frameblank Control
TVP4020 has additional control over behavior at frameblank. It
continues to support automatic synchronization to frameblank where the
new base address for the screen is only accepted during the vertical
blank interval. In addition, it supports a free running mode where the
base address is updated immediately without waiting for the blanking
period.
TVP4020 also supports a sync to frame rate mode which only allows the
base address to be updated in frameblank while the frame rate keeps up
with the monitor refresh rate. If the frame rate drops below the refresh
rate the base address is updated immediately.
F5
Core Differences
F5.1
Maximum Screen Size
The maximum screen size has been increased to 2048x2048.
Summary of Contents for TVP4020 PERMEDIA 2
Page 1: ...Texas Instruments TVP4020 PERMEDIA 2 Programmer s Reference Manual Issue 4 ...
Page 284: ...TVP4020 Programmers Reference Manual A Gouraud Shaded Triangle 275 ...
Page 292: ...TVP4020 Programmers Reference Manual Register Tables 283 ...
Page 314: ...TVP4020 Programmers Reference Manual Index 305 ...
Page 315: ...Index TVP4020 Programmers Reference Manual 306 Index ...
Page 323: ...Index TVP4020 Programmers Reference Manual 314 ...