STG3000X-RIVA128 STMicroelectronics, STG3000X-RIVA128 Datasheet - Page 39

• Manufacturer Part Number: STG3000X-RIVA128
• Description: 128-BIT 3D MULTIMEDIA ACCELERATOR
• Manufacturer: STMicroelectronics

128-BIT 3D MULTIMEDIA ACCELERATOR
8
The RIVA 128 Multimedia Accelerator introduces
a multi-function Video Port that has been designed
to exploit the bus mastering functionality of the
RIVA 128. The Video Port is compliant with a sim-
plified ITU-R-656 video format with control of at-
tached video devices performed through the RIVA
128 serial interface. Video Port support includes:
Figure 37. Connections to multiple video modules
8.1
Windows 95 DirectMPEG API acceleration by
providing:
- Bus mastered compressed data transfer to
Single 8-bit bus multiplexing among four trans-
fer types: video, VBI, host and compressed
data
Synchronous 40MHz address/data multiplexed
bus
Hardware-based round-robin scheduler with
predictable performance for all transfer types
PCI/AGP
VIDEO PORT
attached DVD and MPEG-2 decoders
VIDEO INTERFACE PORT FEATURES
RIVA 128
SDA
SCL
MPCLK
MPAD[7:0]
MPFRAME#
MPDTACK#
MPSTOP#
- Local interrupt and pixel stream handling
- Hardware buffer management of com-
Supports popular video decoders including the
Philips SAA7111A, SAA7112, ITT 3225, and
Samsung KS0127. The Video Port initiates
transfers of video packets over the internal NV
bus to either on or off screen surfaces as de-
fined in the DirectDraw and DirectVideo APIs.
Supports filtered down-scaling or decimation
Allows additional devices to be added
Supports multiple video modules and one rib-
bon cable board on the same bus
ITU-R-656 Master Mode
Video Port
- Simplified ITU-R-656 Video Format -- sup-
- VBI data output from video decoder is cap-
Media Port
pressed data, decompressed video pixel
data and decompressed audio streams
ports HSYNC, VSYNC, ODD FIELD and
EVEN FIELD
tured as raw or sliced data
Controller
decoder
(MPC)
Video
ITU-R-656
VMI 1.4
TV tuner
Controller
S Video
DVD
RIVA 128
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