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OMAP35x Evaluation Module
2.1.2 Audio Interface
The Audio section consists of one stereo Line IN and stereo Headset OUT through
the audio codec on the TPS65950 device. The audio codec on the TPS65950 is
controlled by internal registers that can be accessed through I2C interface (I2C1).
The McBSP2 interface of the OMAP3530 is connected to the TDM interface of the
TPS65950 device to send and receive audio data (8-kHz up to a 48-kHz sampling
rate) with 4 channels per frame and 16 or 32 bits per sample. The supported
frequencies are 8, 11.025, 12, 16, 22.05, 24, 32, 44.1, and 48 kHz.
The McBSP2 and McBSP3 are multiplexed between the Power module and the
expansion connector. The McBSP2 (McBSP2_SEL) and McBSP3 (McBSP3_SEL)
interface Multiplexers are controlled through SW1 switch on the Processor Module.
2.1.3 Video outputs
The EVM supports both Composite TV (CVBS) output and S-Video output on the
main board. Either CVBS or S-Video is available from OMAP at a given point of
time as both CVBS & S-Video are multiplexed on the same balls.
The digital output of the display controller is always a 24-bit RGB value based on
a pixel request from the video encoder. The video encoder converts RGB video
signals to conform to the NTSC/PAL standard analog video. The video encoder
includes an integrated synchronization signal generator and a 2-channel video
DAC
with
Macrovision™ insertion, modulator, and a control interface. The video encoder
also provides the synchronization signals to the display controller: VSYNC, Active
Video (AVID), and Field ID (FID).
2.1.4 Video Inputs
The OMP35x EVM has multiple video inputs options available on-board as well as
from Expansion connector. The camera interface signals are routed by default to
expansion connector. And the On board Video input options are gated through few
GPIOs (from OMAP & TPS65950).
Though the EVM has multiple video input options, at a given point of time any one
of the Video Input channels can be used. The OMP35x EVM has the below listed
video input options:
•
Video decoder (TVP5146PFP):
o
video
amplifiers,
The
TVP5146PFP
component RGB, composite video and S-Video into YCbCr. OMAP
35X EVM ISP processes this data and displays on the LCD
data
manager,
video
decoder
luma
stage,
supports
A/D
conversion
chroma
stage,
of
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