P83C266BDR datasheet(52/92 Pages) PHILIPS

52 / 92 page

1999 Mar 10

Philips Semiconductors

Product speciﬁcation

Microcontrollers for PAL/SECAM TV

with OSD and VST

P8xCx66 family

17.3.4

OSD HORIZONTAL START REGISTER (OSORGH)

Table 56 OSD Horizontal Start Register (SFR address C3H)

Table 57 Description of OSORGH bits

76543210

−

HP6

HP5

HP4

HP3

HP2

HP1

HP0

BIT

SYMBOL

DESCRIPTION

−

This bit is not used.

HP6

Horizontal starting position selection. These 7 bits select the horizontal starting

position of the OSD. 1 from 110 starting positions may be selected.The reference point

of the horizontal starting position is the leading edge of HSYNC. The horizontal starting

position (HP) is calculated as follows:

Where (HP6

→ HP0) is the decimal value of the contents of OSORGH and

(HP6

→ HP0) ≥ 12H.

Note that the period of the horizontal starting position plus characters display cannot be

more than one HSYNC period (for example 64

µs).

HP5

HP4

HP3

HP2

HP1

HP0

HP6

HP0

→

() OSD clock

Fig.32 OSD starting position reference points.

handbook, full pagewidth

MGL285

VPx

HPx

Personal preferrance

Sound

Picture

Tuning

Leading edge of HSYNCP is the reference point of HPx

Leading edge of VSYNCP is the reference point of VPx

HSYNCP

VSYNCP

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