Architecture

STM7710

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2.11

Main display output stage

The display composition from MIX1 can be output on any of the main display output

interfaces (Figure 5). These are:

●

the main analog output,

●

the DVI/HDMI output.

The main analog output interface supports YPbPr or RGB analog output with or without

embedded syncs. High current HD DACs are used to minimize external component count.

Programming flexibility is provided to support different display timings and resolutions.

These include support for:

●

SMPTE,

●

BS4 SD and HD formats,

●

standard formats supported:

–

480i (full scanning 525i) / 576i (full scanning 625i),

–

480p (full scanning 525p) / 576p (full scanning 625p),

–

720p (full scanning 750p),

–

1080i (full scanning 1125i),

●

panel displays with a pixel clock up to 74.25 MHz.

Timings and levels can be programmed to comply with EIA770.x (x = 1, 2, 3) requirements.

The main analog output can also have Macrovision™ encoding for 480i and 480p and

CGMS encoding.

The HDMI output provides DVI-HDCP or HDMI compliant copy protected digital output of

the main display composition.

2.12

Auxiliary display output stage

The display composition from MIX2 is output on the auxiliary display output interface

(Figure 5).

This interface uses a digital encoder that encodes the output from the auxiliary mixer into a

standard analog baseband PAL/NTSC signal and into YPbPr components.

The digital encoder performs closed-caption, CGMS, WSS, teletext and VPS encoding and

allows Macrovision 7.01/ 6.1 copy protection.

An integrated tri-DAC provides three analog TV outputs, on which it is possible to output

either (S-VHS(Y/C) + CVBS), YPbPr or RGB.