SAA4995WP データシートの表示（PDF） - Philips Electronics

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SAA4995WP

PANorama-IC (PAN-IC)

Philips Electronics 

Philips Semiconductors

PANorama-IC (PAN-IC)

Preliminary specification

SAA4995WP

FEATURES

• Horizontal sample rate conversion in both zoom and

compress direction, with a sample rate conversion factor

between 0.5 and 2 (in 384 steps)

• Dynamic sample rate conversion for panorama mode

display e.g. 4 : 3 material on a 16 : 9 display

• Dynamic sample rate conversion for amaronap mode

display of e.g. 16 : 9 material on a 4 : 3 display

• Operates with 1fh and 2fh

• Programmable via microcontroller SNERT

(Synchronous No parity Eight bit Receive Transmit) bus.

GENERAL DESCRIPTION

The PAN-IC is an add-on IC to be used, for example,

between analog-to-digital conversion and a serial (field)

memory. The device performs the following tasks:

• Linear horizontal sample rate conversion in both zoom

and compress direction, with a sample rate conversion

factor between 0.5 and 2

• Dynamic sample rate conversion for panorama mode

display of e.g. 4 : 3 material on a 16 : 9 display

• Dynamic sample rate conversion for amaronap mode

display of e.g. 16 : 9 material on a 4 : 3 display.

The PAN-IC has the ability to increase the data rate from

the ADC to a maximum of twice the data rate at the output.

To achieve this a clock rate at twice the normal output

clock rate is needed to write data to the memory.

All actions to generate a lower data rate, produces disable

cycles in Write Enable (WE).

QUICK REFERENCE DATA

SYMBOL

VDD

IDD

fCLK

Tamb

PARAMETER

supply voltage

supply current

operating clock frequency

operating ambient temperature

MIN.

4.5

−

−

0

TYP.

5

110

−

−

MAX.

5.5

−

33

70

UNIT

V

mA

MHz

°C

ORDERING INFORMATION

TYPE NUMBER

SAA4995WP

PACKAGE

NAME

DESCRIPTION

PLCC44 plastic leaded chip carrier; 44 leads

VERSION

SOT187-2

1997 Jun 10

2

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