MC13081X View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

Manufacturer

MC13081X

Multimode Color Monitor Horizontal, Vertical, and Video Combination Processor

Motorola => Freescale 

Pin

Name

48

Vertical Ramp

Output

49, 50 N/C

51

Vertical Ramp

Capacitor

52

Vertical Size

Control

MC13081X

PIN FUNCTION DESCRIPTION (continued)

Equivalent Internal Circuit

Description

Vertical

Oscillator

2.0 V, 5.0 V

Trip Pts

Vertical

Ramp Generator

VCC

10 k

48

This ramp signal drives the external vertical output

devices.

Voltage ramps from 2.0 V to less than 5.0 V,

To Vertical

Deflection

depending on frequency and components at Pins 51

Circuit

and 52.

Loading on this pin must be > 30 kΩ to avoid

distorting or clipping the ramp.

I VCC

I

5.7

2

Ramp Output

Buffer

1.0 k

Switching

Control

200

Vertical

Oscillator

52

51

C51

These two pins are internally connected to each other,

and nothing else.

The slope of the output ramp is determined by the

components at Pins 51 and 52.

The resistor at Pin 52 sets the charging current of the

capacitor, and therfore the vertical height of the

picture.

The linearity of the ramp can be modified by external

feedback.

53

Vertical Sync

Polarity

Detector

5.0 V

The output goes low when the vertical sync input

polarity is positive. It goes high when the vertical sync

input polarity is negative.

54

Horizontal

Sync Polarity

Detector

53, 54

The output goes low when the horizontal sync input

polarity is positive. It goes high when the horizontal

sync input polarity is negative.

55

Horizontal

Position

Control

56

Timebase

VCC2

5.0 V

55

R55

5.0 V

15 k

25 k

10 k

Ramp 1

Varying the voltage at this pin will change the

horizontal position of the picture.

Input impedance is ≈ 31 kΩ.

Connected to a 8.0 V, ±5%, dc supply. Decoupling is

required at this pin.

10

MOTOROLA ANALOG IC DEVICE DATA

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