1997 Mar 03

4

Philips Semiconductors

Objective specification

Stand-alone OSD for monitor applications

PCB8517

PINNING

SYMBOL

PIN

DESCRIPTION

1

analog ground

VCO

2

DC control voltage input/output to regulate the internal PLL oscillator frequency; a low-pass filter

circuit is connected to this pin

BIAS

3

bias input/output to regulate the bias current of internal current control oscillator to resonate at a

specific dot frequency

4

analog power supply

HFLB

5

horizontal sync input signal from flyback circuit with negative polarity

EN

6

active LOW input to enable serial interface

SDI

7

data input of serial interface

SCK

8

clock input of serial interface

9

digital power supply

VFLB

10

vertical sync input signal from flyback circuit with negative polarity

HTONE

11

half tone control which outputs a logic 1 during windowing except characters are displayed; it is

used to lower the external RED, GREEN and BLUE amplifier gain to achieve a transparent

windowing effect

FB

12

fast blanking output of OSD; active HIGH and high impedance when OSD is disabled

BLUE

13

blue colour output of OSD; active HIGH and high impedance when OSD is disabled

GREEN

14

green colour output of OSD; active HIGH and high impedance when OSD is disabled

RED

15

red colour output of OSD; active HIGH and high impedance when OSD is disabled

16

digital ground

Fig.2 Pin configuration.

handbook, halfpage

PCB8517

MGD760

1

2

3

4

5

6

7

8

VSSA

VCO

BIAS

VDDA

HFLB

EN

SDI

SCK

VSSD

RED

GREEN

BLUE

FB

HTONE

VFLB

VDDD

16

15

14

13

12

11

10

9