TDA9113 datasheet(35/50 Pages) STMICROELECTRONICS

35 / 50 page

TDA9113

35/50

Figure 13. EWOut output waveforms

9.6 - DYNAMIC CORRECTION

OUTPUTS SECTION

9.6.1 - Horizontal dynamic correction output

HDyCor

A parabolic waveform at horizontal frequency is

output on pin HDyCor. It can be adjusted in ampli-

tude and phase (

HDC-AMP and HDC-SYM I2C

bus controls). See also I2C BUS CONTROL REG-

ISTER MAP on page 22. The minimum value in

horizontal parabola amplitude I2C bus control

does not correspond to null horizontal amplitude.

Refer to Figure 14. The phase of the parabola can

roughly be adjusted via

HDyCorPh I2C bus bit to

coincide either with the beginning or the middle of

the H-flyback pulse. Moreover, its centre can be

offset via

HDC-SYM I

2C bus control. There is a flat

part of a quasi-constant length at the beginning of

the parabola. Refer to electrical specifications for

values.

The parabola tracks with value in

HSIZE control

and is horizontal breathing compensated if

HDy-

CorTr I2C bit is set to 1 (0 by default).

9.6.2 - Vertical dynamic correction output

VDyCor

A parabola at vertical deflection frequency is avail-

able on pin VDyCor. Its amplitude is adjustable via

VDC-AMP I2C bus control and polarity controlled

via VDyCorPol I2C bus bit. It tracks with real verti-

cal amplitude and position (including breathing

compensation). It is also affected by C- and S-cor-

rections.

The use of both correction waveforms is up to the

application (e.g. dynamic focus).

Keystone

PCC

Top

Bott om

Corners

Vertical sawtooth

alone

tVR

V(VCap)

TVR

V(EWOut)

alone

VEW-PCC

VEW-TCor

VEW-BCor

VEW-Key

VEW-DC

V(HEHT)

VRefO

VHEHT(min)

HSIZE (I2C)

min

med

ium

maxim

VEW(min)

VEW(max)

Vertical sawtooth

tVR

V(VCap)

TVR

VRefO

VHEHT(min)

Breathing

compensation

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