ASX340AT datasheet(34/54 Pages) ONSEMI

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ASX340AT

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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

0x2

0x3

0x6

0x7

0xA

0xB

0xD

0xE

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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