MC44460

9

MOTOROLA ANALOG IC DEVICE DATA

PIN FUNCTION DESCRIPTION (continued)

Pin

Description

Equivalent Internal Circuit

49

4.8 k

49

75

Composite

Video

Video Out

The selected Video 1/2 input is available at the Video Out mixed with

the PIP overlay when selected. This signal is a nominal 2.0 V

peak–to–peak signal unterminated. This connection is intended to

drive an external series 75

Ω load into a 75 Ω termination to ground to

provide a 1.0 Vpp signal at the termination.

51

0.1

51

ADC Mid Reference

The mid–point of the A/D converter reference divider network is

brought out on this pin in order to add a filter capacitor to remove any

noise in the network.

54, 53, 52,

42, 41, 40

45

0.01

Encoder and Decoder YUV Caps

During the internal H rate clamping time the YUV reference levels are

set by the charge on the capacitors attached to these pins. The

nominal value of these capacitors should be 0.01

µF.

Pins 11 to 13, 16 to 27, 55 and 56 are test pins configured as outputs in a high impedance state. In an application, no connection should be made to these pins.

Figure 1. I2C Data Transfer

MSB

MSB

ACK

ACK

1

2

7

8

9

1

2

7

8

9

S

Slave Address

R/W

A

Data

A

Data

A

P

Data Transferred

(n Bytes + Acknowledge)

A = Acknowledge

S = Start

P = Stop

Start

Condition

Stop

Condition