PDSP1601/PDSP1601A

1

The PDSP1601 is a high performance 16-bit arithmetic

logic unit with an independent on-chip 16-bit barrel shifter.

The PDSP1601A has two operating modes giving 20MHz or

10MHz register-to-register transfer rates.

The PDSP1601 supports Multicycle multiprecision

operation. This allows a single device to operate at 20MHz for

16-bit fields, 10MHz for 32-bit fields and 5MHz for 64-bit fields.

The PDSP1601 can also be cascaded to produce wider words

at the 20MHz rate using the Carry Out and Carry In pins. The

Barrel Shifter is also capable of extension, for example the

PDSP1601 can used to select a 16-bit field from a 32-bit input

in 100ns.

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L

K

J

H

G

F

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D

C

B

A

PIN 1A INDEX MARK

ON TOP SURFACE

AC84

APPLICATIONS

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Digital Signal Processing

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Array Processing

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Graphics

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Database Addressing

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High Speed Arithmetic Processors

FEATURES

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16-bit, 32 instruction 20MHz ALU

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16-bit, 20MHz Logical, Arithmetic or Barrel Shifter

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Independent ALU and Shifter Operation

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4 x 16-bit On Chip Scratchpad Registers

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Multiprecision Operation; e.g. 200ns 64-bit

Accumulate

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Three Port Structure with Three Internal Feedback

Paths Eliminates I/O Bottlenecks

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Block Floating Point Support

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300mW Maximum Power Dissipation

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84-pin Pin Grid Array or 84 Contact LCC Packages

or 100 pin Ceramic Quad Flat Pack

ASSOCIATED PRODUCTS

PDSP16112 Complex Multiplier

PDSP16116 16 x 16 Complex Multiplier

PDSP16318 Complex Accumulator

PDSP16330 Pythagoras Processor

Fig.1 Pin connections - bottom view

GC100

ORDERING INFORMATION

PDSP1601 MC GGCR

10MHz MIL883 Screened -

QFP package

PDSP1601A BO AC

20MHz Industrial - PGA

package

N.B

Further details of the Military grade part are

available in a separate datasheet (DS3763)

PDSP1601/PDSP1601A

ALU and Barrel Shifter

DS3705

ISSUE 3.0

November 1998