L2330 datasheet(1/14 Pages) LODEV

Part #	L2330

Description	Coordinate Transformer

PDF	14 Pages

Scroll/Zoom	100%

Manufacturer	LODEV [LOGIC Devices Incorporated]

Direct Link	http://www.logicdevices.com

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DEVICES INCORPORATED

Special Arithmetic Functions

1

L2330

Coordinate Transformer

09/27/2001–LDS.2330-E

u

u Rectangular-to-Polar or Polar-to-

Rectangular at 50 MHz

u

u Performs Direct Digital Synthesis

(DDS) functions along with PM and

FM Modulation

u

u 24-Bit Polar Phase Angle Accuracy

u

u Replaces Fairchild TMC2330A

u

u 120-pin PQFP

FEATURES

DESCRIPTION

L2330

Coordinate Transformer

DEVICES INCORPORATED

L2330 BLOCK DIAGRAM

The L2330 is a coordinate transformer

that converts bidirectionally between

Rectangular and Polar coordinates.

When in Rectangular-to-Polar mode,

the L2330 is able to retrieve phase and

magnitude information or backward

map from a rectangular raster display

to a radial data set.

When in Polar-to-Rectangular mode,

the L2330 is able to execute direct

digital waveform synthesis and

modulation. Real-time image-space

conversions are achieved from radi-

ally-generated images, such as RADAR,

SONAR, and ultrasound to raster

display formats.

Functional Description

The L2330 converts bidirectionally

between Rectangular (Cartesian) and

Polar (Phase and Magnitude) coordi-

nates. The user selects the numeric

format. A valid transformed result is

seen at the output after 22 clock cycles

and will continue upon every clock

cycle thereafter.

When in Rectangular-to-Polar mode,

the user inputs a 16-bit Rectangular

coordinate and the output generates a

Polar transformation with 16-bit

magnitude and 16-bit phase. The user

may select the data format to be either

two’s complement or sign-and-

magnitude Cartesian data format.

Polar Magnitude data is always in

magnitude format only. Polar Phase

Angle data is modulo 2

π so it may be

regarded as either unsigned or two’s

complement format.

When in Polar-to-Rectangular mode,

the user inputs 16-bit Polar Magnitude

and 32-bit Phase data and the output

generates a 16-bit Rectangular coordi-

nate. The use may select the data

format to be either two’s complement

or sign-and-magnitude Cartesian data

format.

OVF

CLK

POLAR

16

OERX

PYOUT15-0

16

2

32

ENXR

XRIN15-0

ENYP1-0

YPIN31-0

ACC1-0

TCXY

RTP

RXOUT15-0

2

OEPY

16

RECTANGULAR

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L2330 Datasheet(PDF) 1 Page - LOGIC Devices Incorporated

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