ST92185B datasheet(125/178 Pages) STMICROELECTRONICS

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ST92185B - ON SCREEN DISPLAY (OSD)

ON SCREEN DISPLAY (Cont’d)

CURSOR HORIZONTAL POSITION REGISTER

(CHPOSR)

R246 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7 = Reserved.

Bit 6:0 = CHP[6:0]:

Cursor Horizontal Position.

The cursor is positioned by character.

CHP= 0 points to the first character

CHP= 39d points to the end of the row (single

page display)

CHP= 79d points to the last character in the row

(double page display)

CURSOR

VERTICAL

POSITION

(CVPOSR)

R247 - Read/Write

Reset Value: 0000 0000 (00h)

Bit 7 = FON:

"Flash On" flag bit.

The FON bit remains at "0" during 32 consecutive

TV fields followed by a "1" state during the 16 next

TV fields. This flag provides a 1Hz time reference

for an easy software control of all flashing effects

(assuming a 50 Hz TV signal, the FON total period

will be 0.96 seconds).

This bit is READ ONLY. Trying to write any value

will have no effect.

Bit 6:5 = CM[1:0]:

Cursor Mode control bits.

Bit 4:0 = CVP[4:0]:

Cursor Vertical Position.

The cursor is positioned by row. The cursor is al-

ways single size.

CVP= 0 locates the cursor on the Header row

CVP= 25d locates the cursor on the last Status

row.

CHP6

CHP5

CHP4

CHP3

CHP2

CHP1

CHP0

FON

CM1

CM0

CVP4

CVP3

CVP2

CVP1

CVP0

CM1 CM0

Cursor Mode

Cursor Disable

Static Cursor (inverted foreground & invert-

ed background colours)

Flash Cursor (flash from current to inverted

colours & vice versa)

Cursor done with Underline (use of current

foreground color)

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