ASX340AT_16 Datasheet, PDF (34/54 Pages) ON Semiconductor – 1/4‐inch Color CMOS NTSC/PAL Digital Image SOC

ASX340AT
Full Character Set for Overlay
Figure 28 shows all of the characters that can be generated
by the ASX340AT.
0x0 0x4 0x8 0xC
0x1 0x5 0x9 0xD
0x2 0x6 0xA 0xE
0x3 0x7 0xB 0xF
Figure 33. Full Character Set for Overlay
MODES AND TIMING
This section provides an overview of the typical usage
modes and related timing information for the ASX340AT.
Composite Video Output
The external pin DOUT_LSB0 can be used to configure the
device for default NTSC or PAL operation (auto-config
mode). This and other video configuration settings are
available as register settings accessible through the serial
interface.
NTSC
Both differential and single-ended connections of the full
NTSC format are supported. The differential connection
that uses two output lines is used for low noise or long
distance applications. The single-ended connection is used
for PCB tracks and screened cable where noise is not a
concern. The NTSC format has three black lines at the
bottom of each image for padding (which most LCDs do not
display).
PAL
The PAL format is supported with 576 active image rows.
Single-Ended and Differential Composite Output
The composite output can be operated in a single-ended or
differential mode by simply changing the external resistor
configuration. Refer to the Developer Guide for
configuration options.
Parallel Output (DOUT)
The DOUT[7:0] port supports both progressive and
Interlaced mode. Progressive mode (with FV and LV signal)
include raw bayer(8 or 10 bit), YCbCr, RGB. Interlaced
mode is CCIR656 compliant.
Figure 29 shows the data that is output on the parallel port
for CCIR656. Both NTSC and PAL formats are displayed.
The blue values in Figure 29 represent NTSC (525/60). The
red values represent PAL (625/50).
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