7220 datasheet(216/303 Pages) RENESAS

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APPLICATION

5.5 Example of I2C-BUS control by software (M37220M3-XXXSP/FP)

7220 Group User’s Manual

5-43

s SHARPNESS, CONTRAST, TINT, COLOR, BRIGHT

Data is set to change the picture data.

Some TVs have a picture mode function (such as the movie mode, standard mode), the fixed data

is set according to the mode. Accordingly, it is necessary to change the picture data when changing

the picture mode.

s DEFEAT

This switch turns DEFEAT off when AFT is on, and vice versa.

s TV/EXT

This selects either a TV’s signal or an external device’s signal. This bit should be set to “0” when

TV’s signal is selected and set to “1” when an external device’s signal is selected.

s AUTO

This determines whether the automatic determination of the color system is used or not. When

AUTO is “0,” manual determination is set; when “1,” determination is performed automatically.

s 3.58/NTSC/SECAM

When setting AUTO (bit 5 at sub-address 0616, write data) to “1,” these bits are automatically set

inside the M52340SP. When setting AUTO to “0,” it is necessary to set the data shown in Table

5.5.10, according to the color system.

s H PHASE

The picture’s horizontal position is adjusted. Data is given every 50 Hz or 60 Hz and the data is

set when frequency changes. For wide TVs etc., data is given for each screen size mode, and the

data is set when the screen size mode changes.

s DRIVE R, DRIVE B

Data is used to adjust the output amplitude ratio of R, G and B signals. Since G is the fixed data,

its ratio is adjusted by R and B.

s MUTE

This is the video mute ON/OFF switch.

s CUT OFF R, CUT OFF G, CUT OFF B

Data is used to adjust the output DC level of R, G and B signals.

s F TRAP

This register performes the fine adjustments to the trap frequency of TRAP for Y/C separation.

Color system

PAL

SECAM

NTSC3.58

NTSC4.43

NTSC

SECAM

Table 5.5.10 Setting of color system (at sub-address

0916, write data)

3.58

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