L2330QC25 datasheet(4/14 Pages) LODEV

Part #	L2330QC25

Description	Coordinate Transformer

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Manufacturer	LODEV [LOGIC Devices Incorporated]

Direct Link	http://www.logicdevices.com

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DEVICES INCORPORATED

L2330

Coordinate Transformer

4

Special Arithmetic Functions

09/27/2001–LDS.2330-E

FIGURE 1B.OUTPUT FORMATS

15 14 13

2

1

0

NS 2

14 213

2

1

2

0

15 14 13

2

1

0

NS 2

14 213

2

1

2

0

Integer Signed Magnitude (RTP = 0, TCXY = 0)

15 14 13

2

1

0

–2

15 214 213

2

1

2

0

15 14 13

2

1

0

–2

15 214 213

2

1

2

0

Integer Two's Complement (RTP = 0, TCXY = 1)

15 14 13

2

1

0

2

15 214 213

2

1

2

0

15 14 13

2

1

0

*±2

0 2–1 2–2

2

–13 2–14 2–15

RXOUT

PYOUT

15 14 13

2

1

0

NS 2

–1 2–2

2

–13 2–14 2–15

15 14 13

2

1

0

NS 2

–1 2–2

2

–13 2–14 2–15

Fractional Signed Magnitude (RTP = 0, TCXY = 0)

15 14 13

2

1

0

–2

0 2–1 2–2

2

–13 2–14 2–15

15 14 13

2

1

0

–2

0 2–1 2–2

2

–13 2–14 2–15

Fractional Two's Complement (RTP = 0, TCXY = 1)

15 14 13

2

1

0

2

0

2

–1 2–2

2

–13 2–14 2–15

15 14 13

2

1

0

*±2

0 2–1 2–2

2

–13 2–14 2–15

*±2

0 denotes two's complement sign or highest magnitude bit. Since phase angles are modulo 2π

and phase accumulator is modulo 2

32, this bit may be regarded as ±π.

NS denotes negative sign. (i.e. '1' negates the number)

Fract. Unsigned Mag./Two's Comp.

Integer Unsigned Magnitude

(RTP = 1)

Fract. Unsigned Mag./Two's Comp.

Fractional Unsigned Magnitude

(RTP = 1)

OVF — Overflow Flag

OVF will go HIGH on the clock the

magnitude of either of the current

Cartesian coordinate outputs exceed

the maximum range. OVF will return

LOW on the clock that the Cartesian

output value(s) return within range.

An overflow condition can only occur

when RTP is LOW.

OERX — x-coordinate/Magnitude Data

Output Enable

When OERX is LOW, RXOUT15-0 is

enabled for output. When OERX is

HIGH, RXOUT15-0 is placed in a

high-impedance state.

OEPY — y-coordinate/Phase Angle Data

Output Enable

When OEPY is LOW, PYOUT15-0 is

enabled for output. When OEPY is

HIGH, PYOUT15-0 is placed in a

high-impedance state.

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