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PDSP1601/PDSP1601A

ALU and Barrel Shifter

Supersedes version in December 1993 Digital Video & DSP IC Handbook, HB3923-1

DS3705 - 2.3 September 1996

PDSP1601/PDSP1601A

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.

PIN 1A INDEX MARK

ON TOP SURFACE

A

B

C

D

E

F

G

H

J

K

L

11 10 9

8 7

6

5

4

3

2

1

AC84

LC84

FEATURES

s

s

s

s

s

s

s

s

s

16-bit, 32 instruction 20MHz ALU

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

Independent ALU and Shifter Operation

4 x 16-bit On Chip Scratchpad Registers

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

Accumulate

Three Port Structure with Three Internal Feedback

Paths Eliminates I/O Bottlenecks

Block Floating Point Support

300mW Maximum Power Dissipation

84-pin Pin Grid Array or 84 Contact LCC Packages

or 100 pin Ceramic Quad Flat Pack

GG100

Fig.1 Pin connections - bottom view

APPLICATIONS

s

s

s

s

s

Digital Signal Processing

Array Processing

Graphics

Database Addressing

High Speed Arithmetic Processors

ASSOCIATED PRODUCTS

PDSP16112

PDSP16116

PDSP16318

PDSP16330

Complex Multiplier

16 x 16 Complex Multiplier

Complex Accumulator

Pythagoras Processor

1

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